Problem with remap_page_range on IA32 with more than 4GB RAM

Problem with remap_page_range on IA32 with more than 4GB RAM

[John Fusco]

I have a problem and I would like some comments on how to fix it.

I have a custom PCI-X device installed in an IA32 system.  The device 
expects to see a flat contiguous address space on the host, from which 
it reads and sends its data.  The technique I used is right out of the 
O'Reilly Device Drivers book, which is to hide memory from the kernel 
with the 'mem=YYY' boot parameter.  I then provide a mmap method to map 
the contiguous (hidden) memory into user space via a call to 
'remap_page_range'.

Everything worked great until we decided that we needed to install 6GB 
in this system.  The problem is that remap_page_range() uses an unsigned 
long as the parameter for a physical address.  On IA32, an unsigned long 
is 32-bits, but the IA32 is capable of addressing well over 4GB of RAM.  
So physical addresses on IA32 must be larger than 32 bits.

I chose to work around this by patching the kernel.  I changed the 
unsigned long parameters used for physical address in mm/memory.c to 
'dma64_addr_t'.  This seems to work and I don't see any holes in the 
approach, but I would appreciate any comments (or better solutions).

I can post the patch here if anyone would like to see it.  It seems that 
Linux could use a unique typedef for a physical address.  Right now I 
think dma64_addr_t fits the bill.

Thanks,
John
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Re: Problem with remap_page_range on IA32 with more than 4GB RAM

[William Lee Irwin III]

On Thu, Sep 23, 2004 at 06:22:22PM -0500, John Fusco wrote:
> I have a problem and I would like some comments on how to fix it.
> I have a custom PCI-X device installed in an IA32 system.  The device 
> expects to see a flat contiguous address space on the host, from which 
> it reads and sends its data.  The technique I used is right out of the 
> O'Reilly Device Drivers book, which is to hide memory from the kernel 
> with the 'mem=YYY' boot parameter.  I then provide a mmap method to map 
> the contiguous (hidden) memory into user space via a call to 
> 'remap_page_range'.
> Everything worked great until we decided that we needed to install 6GB 
> in this system.  The problem is that remap_page_range() uses an unsigned 
> long as the parameter for a physical address.  On IA32, an unsigned long 
> is 32-bits, but the IA32 is capable of addressing well over 4GB of RAM.  
> So physical addresses on IA32 must be larger than 32 bits.
> I chose to work around this by patching the kernel.  I changed the 
> unsigned long parameters used for physical address in mm/memory.c to 
> 'dma64_addr_t'.  This seems to work and I don't see any holes in the 
> approach, but I would appreciate any comments (or better solutions).
> I can post the patch here if anyone would like to see it.  It seems that 
> Linux could use a unique typedef for a physical address.  Right now I 
> think dma64_addr_t fits the bill.

I wrote a patch that made it take a pfn at some point. I suppose I
could respin that while renaming the function to remap_pfn_range() or
otherwise fiddle with whatever whoever complained about.


-- wli
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[vm 0/4] replace remap_page_range() with remap_pfn_range()

[William Lee Irwin III]

On Thu, Sep 23, 2004 at 06:22:22PM -0500, John Fusco wrote:
> I have a problem and I would like some comments on how to fix it.
> I have a custom PCI-X device installed in an IA32 system.  The device 
> expects to see a flat contiguous address space on the host, from which 
> it reads and sends its data.  The technique I used is right out of the 
> O'Reilly Device Drivers book, which is to hide memory from the kernel 
> with the 'mem=YYY' boot parameter.  I then provide a mmap method to map 
> the contiguous (hidden) memory into user space via a call to 
> 'remap_page_range'.
> Everything worked great until we decided that we needed to install 6GB 
> in this system.  The problem is that remap_page_range() uses an unsigned 
> long as the parameter for a physical address.  On IA32, an unsigned long 
> is 32-bits, but the IA32 is capable of addressing well over 4GB of RAM.  
> So physical addresses on IA32 must be larger than 32 bits.

Do these patches work for you? Compiletested on sparc64.


-- wli

[vm 1/4] convert remap_page_range() to remap_pfn_range()

[William Lee Irwin III]

On Thu, Sep 23, 2004 at 07:17:35PM -0700, William Lee Irwin III wrote:
> Do these patches work for you? Compiletested on sparc64.

Convert remap_page_range() to remap_pfn_range(), with a temporary
remap_page_range() wrapper inline (to be eliminated in the sequel).

Index: mm2-2.6.9-rc2/mm/memory.c
===================================================================
--- mm2-2.6.9-rc2.orig/mm/memory.c	2004-09-22 21:32:52.000000000 -0700
+++ mm2-2.6.9-rc2/mm/memory.c	2004-09-23 17:03:21.296806522 -0700
@@ -945,16 +945,14 @@
  * in null mappings (currently treated as "copy-on-access")
  */
 static inline void remap_pte_range(pte_t * pte, unsigned long address, unsigned long size,
-	unsigned long phys_addr, pgprot_t prot)
+	unsigned long pfn, pgprot_t prot)
 {
 	unsigned long end;
-	unsigned long pfn;
 
 	address &= ~PMD_MASK;
 	end = address + size;
 	if (end > PMD_SIZE)
 		end = PMD_SIZE;
-	pfn = phys_addr >> PAGE_SHIFT;
 	do {
 		BUG_ON(!pte_none(*pte));
 		if (!pfn_valid(pfn) || PageReserved(pfn_to_page(pfn)))
@@ -966,7 +964,7 @@
 }
 
 static inline int remap_pmd_range(struct mm_struct *mm, pmd_t * pmd, unsigned long address, unsigned long size,
-	unsigned long phys_addr, pgprot_t prot)
+	unsigned long pfn, pgprot_t prot)
 {
 	unsigned long base, end;
 
@@ -975,12 +973,12 @@
 	end = address + size;
 	if (end > PGDIR_SIZE)
 		end = PGDIR_SIZE;
-	phys_addr -= address;
+	pfn -= address >> PAGE_SHIFT;
 	do {
 		pte_t * pte = pte_alloc_map(mm, pmd, base + address);
 		if (!pte)
 			return -ENOMEM;
-		remap_pte_range(pte, base + address, end - address, address + phys_addr, prot);
+		remap_pte_range(pte, base + address, end - address, pfn + (address >> PAGE_SHIFT), prot);
 		pte_unmap(pte);
 		address = (address + PMD_SIZE) & PMD_MASK;
 		pmd++;
@@ -989,7 +987,7 @@
 }
 
 /*  Note: this is only safe if the mm semaphore is held when called. */
-int remap_page_range(struct vm_area_struct *vma, unsigned long from, unsigned long phys_addr, unsigned long size, pgprot_t prot)
+int remap_pfn_range(struct vm_area_struct *vma, unsigned long from, unsigned long pfn, unsigned long size, pgprot_t prot)
 {
 	int error = 0;
 	pgd_t * dir;
@@ -997,7 +995,7 @@
 	unsigned long end = from + size;
 	struct mm_struct *mm = vma->vm_mm;
 
-	phys_addr -= from;
+	pfn -= from >> PAGE_SHIFT;
 	dir = pgd_offset(mm, from);
 	flush_cache_range(vma, beg, end);
 	if (from >= end)
@@ -1009,7 +1007,7 @@
 		error = -ENOMEM;
 		if (!pmd)
 			break;
-		error = remap_pmd_range(mm, pmd, from, end - from, phys_addr + from, prot);
+		error = remap_pmd_range(mm, pmd, from, end - from, pfn + (from >> PAGE_SHIFT), prot);
 		if (error)
 			break;
 		from = (from + PGDIR_SIZE) & PGDIR_MASK;
@@ -1022,8 +1020,7 @@
 	spin_unlock(&mm->page_table_lock);
 	return error;
 }
-
-EXPORT_SYMBOL(remap_page_range);
+EXPORT_SYMBOL(remap_pfn_range);
 
 /*
  * Do pte_mkwrite, but only if the vma says VM_WRITE.  We do this when
Index: mm2-2.6.9-rc2/include/linux/mm.h
===================================================================
--- mm2-2.6.9-rc2.orig/include/linux/mm.h	2004-09-22 21:32:18.000000000 -0700
+++ mm2-2.6.9-rc2/include/linux/mm.h	2004-09-23 16:35:12.546535586 -0700
@@ -764,8 +764,16 @@
 extern struct page * vmalloc_to_page(void *addr);
 extern struct page * follow_page(struct mm_struct *mm, unsigned long address,
 		int write);
-extern int remap_page_range(struct vm_area_struct *vma, unsigned long from,
-		unsigned long to, unsigned long size, pgprot_t prot);
+int remap_pfn_range(struct vm_area_struct *vma, unsigned long uvaddr,
+		unsigned long pfn, unsigned long size, pgprot_t prot);
+
+static inline int remap_page_range(struct vm_area_struct *vma,
+					unsigned long uvaddr,
+					unsigned long paddr,
+					unsigned long size, pgprot_t prot)
+{
+	return remap_pfn_range(vma, uvaddr, paddr >> PAGE_SHIFT, size, prot);
+}
 
 #ifdef CONFIG_PROC_FS
 void __vm_stat_account(struct mm_struct *, unsigned long, struct file *, long);
Index: mm2-2.6.9-rc2/mm/nommu.c
===================================================================
--- mm2-2.6.9-rc2.orig/mm/nommu.c	2004-09-22 21:31:17.000000000 -0700
+++ mm2-2.6.9-rc2/mm/nommu.c	2004-09-23 16:38:50.608385146 -0700
@@ -560,8 +560,8 @@
 	return NULL;
 }
 
-int remap_page_range(struct vm_area_struct *vma, unsigned long from,
-		unsigned long to, unsigned long size, pgprot_t prot)
+int remap_pfn_range(struct vm_area_struct *vma, unsigned long from,
+		unsigned long pfn, unsigned long size, pgprot_t prot)
 {
 	return -EPERM;
 }
Index: mm2-2.6.9-rc2/Documentation/IO-mapping.txt
===================================================================
--- mm2-2.6.9-rc2.orig/Documentation/IO-mapping.txt	2004-09-12 22:32:00.000000000 -0700
+++ mm2-2.6.9-rc2/Documentation/IO-mapping.txt	2004-09-23 16:40:43.150276178 -0700
@@ -119,9 +119,10 @@
 So why do we care about the physical address at all? We do need the physical
 address in some cases, it's just not very often in normal code.  The physical
 address is needed if you use memory mappings, for example, because the
-"remap_page_range()" mm function wants the physical address of the memory to
-be remapped (the memory management layer doesn't know about devices outside
-the CPU, so it shouldn't need to know about "bus addresses" etc). 
+"remap_pfn_range()" mm function wants the physical address of the memory to
+be remapped, as measured in units of pages, a.k.a. the pfn (the memory
+management layer doesn't know about devices outside the CPU, so it
+shouldn't need to know about "bus addresses" etc). 
 
 NOTE NOTE NOTE! The above is only one part of the whole equation. The above
 only talks about "real memory", that is, CPU memory (RAM). 

[vm 2/4] convert io_remap_page_range() to call remap_pfn_range()

[William Lee Irwin III]

On Thu, Sep 23, 2004 at 07:19:54PM -0700, William Lee Irwin III wrote:
> Convert remap_page_range() to remap_pfn_range(), with a temporary
> remap_page_range() wrapper inline (to be eliminated in the sequel).

Eliminate callers of remap_page_range() via io_remap_page_range().

Index: mm2-2.6.9-rc2/include/asm-ia64/pgtable.h
===================================================================
--- mm2-2.6.9-rc2.orig/include/asm-ia64/pgtable.h	2004-09-12 22:32:00.000000000 -0700
+++ mm2-2.6.9-rc2/include/asm-ia64/pgtable.h	2004-09-23 17:03:29.491560730 -0700
@@ -452,7 +452,9 @@
 #define pte_to_pgoff(pte)		((pte_val(pte) << 1) >> 3)
 #define pgoff_to_pte(off)		((pte_t) { ((off) << 2) | _PAGE_FILE })
 
-#define io_remap_page_range remap_page_range	/* XXX is this right? */
+/* XXX is this right? */
+#define io_remap_page_range(vma, vaddr, paddr, size, prot)		\
+		remap_pfn_range(vma, vaddr, (paddr) >> PAGE_SHIFT, size, prot)
 
 /*
  * ZERO_PAGE is a global shared page that is always zero: used
Index: mm2-2.6.9-rc2/include/asm-arm/pgtable.h
===================================================================
--- mm2-2.6.9-rc2.orig/include/asm-arm/pgtable.h	2004-09-12 22:31:58.000000000 -0700
+++ mm2-2.6.9-rc2/include/asm-arm/pgtable.h	2004-09-23 17:03:29.494560274 -0700
@@ -412,7 +412,7 @@
  * into virtual address `from'
  */
 #define io_remap_page_range(vma,from,phys,size,prot) \
-		remap_page_range(vma,from,phys,size,prot)
+		remap_pfn_range(vma, from, (phys) >> PAGE_SHIFT, size, prot)
 
 #define pgtable_cache_init() do { } while (0)
 
Index: mm2-2.6.9-rc2/include/asm-x86_64/pgtable.h
===================================================================
--- mm2-2.6.9-rc2.orig/include/asm-x86_64/pgtable.h	2004-09-12 22:33:11.000000000 -0700
+++ mm2-2.6.9-rc2/include/asm-x86_64/pgtable.h	2004-09-23 17:03:29.496559970 -0700
@@ -421,7 +421,8 @@
 
 extern int kern_addr_valid(unsigned long addr); 
 
-#define io_remap_page_range remap_page_range
+#define io_remap_page_range(vma, vaddr, paddr, size, prot)		\
+		remap_pfn_range(vma, vaddr, (paddr) >> PAGE_SHIFT, size, prot)
 
 #define HAVE_ARCH_UNMAPPED_AREA
 
Index: mm2-2.6.9-rc2/include/asm-ppc64/pgtable.h
===================================================================
--- mm2-2.6.9-rc2.orig/include/asm-ppc64/pgtable.h	2004-09-22 21:31:14.000000000 -0700
+++ mm2-2.6.9-rc2/include/asm-ppc64/pgtable.h	2004-09-23 17:03:29.500559362 -0700
@@ -492,7 +492,8 @@
  */
 #define kern_addr_valid(addr)	(1)
 
-#define io_remap_page_range remap_page_range 
+#define io_remap_page_range(vma, vaddr, paddr, size, prot)		\
+		remap_pfn_range(vma, vaddr, (paddr) >> PAGE_SHIFT, size, prot)
 
 void pgtable_cache_init(void);
 
Index: mm2-2.6.9-rc2/include/asm-parisc/pgtable.h
===================================================================
--- mm2-2.6.9-rc2.orig/include/asm-parisc/pgtable.h	2004-09-12 22:33:23.000000000 -0700
+++ mm2-2.6.9-rc2/include/asm-parisc/pgtable.h	2004-09-23 17:03:29.503558906 -0700
@@ -505,7 +505,8 @@
 
 #endif /* !__ASSEMBLY__ */
 
-#define io_remap_page_range remap_page_range
+#define io_remap_page_range(vma, vaddr, paddr, size, prot)		\
+		remap_pfn_range(vma, vaddr, (paddr) >> PAGE_SHIFT, size, prot)
 
 /* We provide our own get_unmapped_area to provide cache coherency */
 
Index: mm2-2.6.9-rc2/include/asm-sh/pgtable.h
===================================================================
--- mm2-2.6.9-rc2.orig/include/asm-sh/pgtable.h	2004-09-12 22:33:39.000000000 -0700
+++ mm2-2.6.9-rc2/include/asm-sh/pgtable.h	2004-09-23 17:03:29.505558602 -0700
@@ -274,7 +274,8 @@
 
 #define kern_addr_valid(addr)	(1)
 
-#define io_remap_page_range remap_page_range
+#define io_remap_page_range(vma, vaddr, paddr, size, prot)		\
+	remap_pfn_range(vma, vaddr, (paddr) >> PAGE_SHIFT, size, prot)
 
 /*
  * No page table caches to initialise
Index: mm2-2.6.9-rc2/include/asm-h8300/pgtable.h
===================================================================
--- mm2-2.6.9-rc2.orig/include/asm-h8300/pgtable.h	2004-09-12 22:32:26.000000000 -0700
+++ mm2-2.6.9-rc2/include/asm-h8300/pgtable.h	2004-09-23 17:03:29.507558298 -0700
@@ -50,7 +50,8 @@
  * No page table caches to initialise
  */
 #define pgtable_cache_init()   do { } while (0)
-#define io_remap_page_range	remap_page_range
+#define io_remap_page_range(vma, vaddr, paddr, size, prot)		\
+		remap_pfn_range(vma, vaddr, (paddr) >> PAGE_SHIFT, size, prot)
 
 /*
  * All 32bit addresses are effectively valid for vmalloc...
Index: mm2-2.6.9-rc2/include/asm-i386/pgtable.h
===================================================================
--- mm2-2.6.9-rc2.orig/include/asm-i386/pgtable.h	2004-09-12 22:33:11.000000000 -0700
+++ mm2-2.6.9-rc2/include/asm-i386/pgtable.h	2004-09-23 17:03:29.510557842 -0700
@@ -404,7 +404,8 @@
 #define kern_addr_valid(addr)	(1)
 #endif /* !CONFIG_DISCONTIGMEM */
 
-#define io_remap_page_range remap_page_range
+#define io_remap_page_range(vma, vaddr, paddr, size, prot)		\
+		remap_pfn_range(vma, vaddr, (paddr) >> PAGE_SHIFT, size, prot)
 
 #define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_YOUNG
 #define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_DIRTY
Index: mm2-2.6.9-rc2/include/asm-mips/pgtable.h
===================================================================
--- mm2-2.6.9-rc2.orig/include/asm-mips/pgtable.h	2004-09-12 22:31:59.000000000 -0700
+++ mm2-2.6.9-rc2/include/asm-mips/pgtable.h	2004-09-23 17:03:29.512557538 -0700
@@ -245,7 +245,8 @@
  */
 #define HAVE_ARCH_UNMAPPED_AREA
 
-#define io_remap_page_range remap_page_range
+#define io_remap_page_range(vma, vaddr, paddr, size, prot)		\
+		remap_pfn_range(vma, vaddr, (paddr) >> PAGE_SHIFT, size, prot)
 
 /*
  * No page table caches to initialise
Index: mm2-2.6.9-rc2/include/asm-arm26/pgtable.h
===================================================================
--- mm2-2.6.9-rc2.orig/include/asm-arm26/pgtable.h	2004-09-12 22:31:31.000000000 -0700
+++ mm2-2.6.9-rc2/include/asm-arm26/pgtable.h	2004-09-23 17:03:29.515557082 -0700
@@ -288,7 +288,7 @@
  * into virtual address `from'
  */
 #define io_remap_page_range(vma,from,phys,size,prot) \
-		remap_page_range(vma,from,phys,size,prot)
+		remap_pfn_range(vma, from, (phys) >> PAGE_SHIFT, size, prot)
 
 #endif /* !__ASSEMBLY__ */
 
Index: mm2-2.6.9-rc2/include/asm-ppc/pgtable.h
===================================================================
--- mm2-2.6.9-rc2.orig/include/asm-ppc/pgtable.h	2004-09-12 22:31:57.000000000 -0700
+++ mm2-2.6.9-rc2/include/asm-ppc/pgtable.h	2004-09-23 17:03:29.518556626 -0700
@@ -714,7 +714,8 @@
 /* Needs to be defined here and not in linux/mm.h, as it is arch dependent */
 #define kern_addr_valid(addr)	(1)
 
-#define io_remap_page_range remap_page_range
+#define io_remap_page_range(vma, vaddr, paddr, size, prot)		\
+		remap_pfn_range(vma, vaddr, (paddr) >> PAGE_SHIFT, size, prot)
 
 /*
  * No page table caches to initialise
Index: mm2-2.6.9-rc2/include/asm-m32r/pgtable.h
===================================================================
--- mm2-2.6.9-rc2.orig/include/asm-m32r/pgtable.h	2004-09-22 21:31:14.000000000 -0700
+++ mm2-2.6.9-rc2/include/asm-m32r/pgtable.h	2004-09-23 17:03:29.530554802 -0700
@@ -408,7 +408,8 @@
 /* Needs to be defined here and not in linux/mm.h, as it is arch dependent */
 #define kern_addr_valid(addr)	(1)
 
-#define io_remap_page_range	remap_page_range
+#define io_remap_page_range(vma, vaddr, paddr, size, prot)		\
+		remap_pfn_range(vma, vaddr, (paddr) >> PAGE_SHIFT, size, prot)
 
 #define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_YOUNG
 #define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_DIRTY
Index: mm2-2.6.9-rc2/include/asm-sh64/pgtable.h
===================================================================
--- mm2-2.6.9-rc2.orig/include/asm-sh64/pgtable.h	2004-09-12 22:33:11.000000000 -0700
+++ mm2-2.6.9-rc2/include/asm-sh64/pgtable.h	2004-09-23 17:03:29.533554346 -0700
@@ -479,7 +479,8 @@
 #define PageSkip(page)		(0)
 #define kern_addr_valid(addr)	(1)
 
-#define io_remap_page_range remap_page_range
+#define io_remap_page_range(vma, vaddr, paddr, size, prot)		\
+		remap_pfn_range(vma, vaddr, (paddr) >> PAGE_SHIFT, size, prot)
 #endif /* !__ASSEMBLY__ */
 
 /*
Index: mm2-2.6.9-rc2/include/asm-m68knommu/pgtable.h
===================================================================
--- mm2-2.6.9-rc2.orig/include/asm-m68knommu/pgtable.h	2004-09-12 22:32:54.000000000 -0700
+++ mm2-2.6.9-rc2/include/asm-m68knommu/pgtable.h	2004-09-23 17:03:29.535554042 -0700
@@ -54,7 +54,8 @@
  * No page table caches to initialise.
  */
 #define pgtable_cache_init()	do { } while (0)
-#define io_remap_page_range	remap_page_range
+#define io_remap_page_range(vma, vaddr, paddr, size, prot)		\
+		remap_pfn_range(vma, vaddr, (paddr) >> PAGE_SHIFT, size, prot)
 
 /*
  * All 32bit addresses are effectively valid for vmalloc...
Index: mm2-2.6.9-rc2/include/asm-m68k/pgtable.h
===================================================================
--- mm2-2.6.9-rc2.orig/include/asm-m68k/pgtable.h	2004-09-12 22:33:23.000000000 -0700
+++ mm2-2.6.9-rc2/include/asm-m68k/pgtable.h	2004-09-23 17:03:29.537553738 -0700
@@ -138,7 +138,8 @@
 
 #define kern_addr_valid(addr)	(1)
 
-#define io_remap_page_range remap_page_range
+#define io_remap_page_range(vma, vaddr, paddr, size, prot)		\
+		remap_pfn_range(vma, vaddr, (paddr) >> PAGE_SHIFT, size, prot)
 
 /* MMU-specific headers */
 
Index: mm2-2.6.9-rc2/include/asm-alpha/pgtable.h
===================================================================
--- mm2-2.6.9-rc2.orig/include/asm-alpha/pgtable.h	2004-09-12 22:31:59.000000000 -0700
+++ mm2-2.6.9-rc2/include/asm-alpha/pgtable.h	2004-09-23 17:03:29.540553282 -0700
@@ -328,7 +328,7 @@
 #endif
 
 #define io_remap_page_range(vma, start, busaddr, size, prot) \
-    remap_page_range(vma, start, virt_to_phys((void *)__ioremap(busaddr, size)), size, prot)
+    remap_pfn_range(vma, start, virt_to_phys((void *)__ioremap(busaddr, size)) >> PAGE_SHIFT, size, prot)
 
 #define pte_ERROR(e) \
 	printk("%s:%d: bad pte %016lx.\n", __FILE__, __LINE__, pte_val(e))

[vm 3/4] convert direct callers of remap_page_range()

[William Lee Irwin III]

On Thu, Sep 23, 2004 at 07:21:23PM -0700, William Lee Irwin III wrote:
> Eliminate callers of remap_page_range() via io_remap_page_range().

Eliminate direct callers of remap_page_range().

Index: mm2-2.6.9-rc2/drivers/media/video/zr36120.c
===================================================================
--- mm2-2.6.9-rc2.orig/drivers/media/video/zr36120.c	2004-09-12 22:32:43.000000000 -0700
+++ mm2-2.6.9-rc2/drivers/media/video/zr36120.c	2004-09-23 17:16:04.781739170 -0700
@@ -1475,8 +1475,8 @@
 	/* start mapping the whole shabang to user memory */
 	pos = (unsigned long)ztv->fbuffer;
 	while (size>0) {
-		unsigned long page = virt_to_phys((void*)pos);
-		if (remap_page_range(vma, start, page, PAGE_SIZE, PAGE_SHARED))
+		unsigned long pfn = virt_to_phys((void*)pos) >> PAGE_SHIFT;
+		if (remap_pfn_range(vma, start, pfn, PAGE_SIZE, PAGE_SHARED))
 			return -EAGAIN;
 		start += PAGE_SIZE;
 		pos += PAGE_SIZE;
Index: mm2-2.6.9-rc2/drivers/video/igafb.c
===================================================================
--- mm2-2.6.9-rc2.orig/drivers/video/igafb.c	2004-09-22 21:32:44.000000000 -0700
+++ mm2-2.6.9-rc2/drivers/video/igafb.c	2004-09-23 17:14:23.788092538 -0700
@@ -262,8 +262,8 @@
 		pgprot_val(vma->vm_page_prot) &= ~(par->mmap_map[i].prot_mask);
 		pgprot_val(vma->vm_page_prot) |= par->mmap_map[i].prot_flag;
 
-		if (remap_page_range(vma, vma->vm_start + page, map_offset,
-				     map_size, vma->vm_page_prot))
+		if (remap_pfn_range(vma, vma->vm_start + page,
+			map_offset >> PAGE_SHIFT, map_size, vma->vm_page_prot))
 			return -EAGAIN;
 
 		page += map_size;
Index: mm2-2.6.9-rc2/drivers/video/sgivwfb.c
===================================================================
--- mm2-2.6.9-rc2.orig/drivers/video/sgivwfb.c	2004-09-22 21:31:18.000000000 -0700
+++ mm2-2.6.9-rc2/drivers/video/sgivwfb.c	2004-09-23 17:13:49.395321034 -0700
@@ -719,8 +719,8 @@
 	pgprot_val(vma->vm_page_prot) =
 	    pgprot_val(vma->vm_page_prot) | _PAGE_PCD;
 	vma->vm_flags |= VM_IO;
-	if (remap_page_range
-	    (vma, vma->vm_start, offset, size, vma->vm_page_prot))
+	if (remap_pfn_range(vma, vma->vm_start, offset >> PAGE_SHIFT,
+						size, vma->vm_page_prot))
 		return -EAGAIN;
 	vma->vm_file = file;
 	printk(KERN_DEBUG "sgivwfb: mmap framebuffer P(%lx)->V(%lx)\n",
Index: mm2-2.6.9-rc2/drivers/video/aty/atyfb_base.c
===================================================================
--- mm2-2.6.9-rc2.orig/drivers/video/aty/atyfb_base.c	2004-09-22 21:32:44.000000000 -0700
+++ mm2-2.6.9-rc2/drivers/video/aty/atyfb_base.c	2004-09-23 17:12:40.124851746 -0700
@@ -1174,8 +1174,8 @@
 		    ~(par->mmap_map[i].prot_mask);
 		pgprot_val(vma->vm_page_prot) |= par->mmap_map[i].prot_flag;
 
-		if (remap_page_range(vma, vma->vm_start + page, map_offset,
-				     map_size, vma->vm_page_prot))
+		if (remap_pfn_range(vma, vma->vm_start + page,
+			map_offset >> PAGE_SHIFT, map_size, vma->vm_page_prot))
 			return -EAGAIN;
 
 		page += map_size;
Index: mm2-2.6.9-rc2/drivers/video/gbefb.c
===================================================================
--- mm2-2.6.9-rc2.orig/drivers/video/gbefb.c	2004-09-22 21:31:18.000000000 -0700
+++ mm2-2.6.9-rc2/drivers/video/gbefb.c	2004-09-23 17:13:23.384275314 -0700
@@ -1018,8 +1018,8 @@
 		else
 			phys_size = TILE_SIZE - offset;
 
-		if (remap_page_range
-		    (vma, addr, phys_addr, phys_size, vma->vm_page_prot))
+		if (remap_pfn_range(vma, addr, phys_addr >> PAGE_SHIFT,
+						phys_size, vma->vm_page_prot))
 			return -EAGAIN;
 
 		offset = 0;
Index: mm2-2.6.9-rc2/drivers/media/video/cpia.c
===================================================================
--- mm2-2.6.9-rc2.orig/drivers/media/video/cpia.c	2004-09-12 22:32:56.000000000 -0700
+++ mm2-2.6.9-rc2/drivers/media/video/cpia.c	2004-09-23 18:22:48.372100922 -0700
@@ -215,20 +215,6 @@
  * Memory management
  *
  **********************************************************************/
-
-/* Here we want the physical address of the memory.
- * This is used when initializing the contents of the area.
- */
-static inline unsigned long kvirt_to_pa(unsigned long adr)
-{
-	unsigned long kva, ret;
-
-	kva = (unsigned long) page_address(vmalloc_to_page((void *)adr));
-	kva |= adr & (PAGE_SIZE-1); /* restore the offset */
-	ret = __pa(kva);
-	return ret;
-}
-
 static void *rvmalloc(unsigned long size)
 {
 	void *mem;
@@ -3800,8 +3786,8 @@
 
 	pos = (unsigned long)(cam->frame_buf);
 	while (size > 0) {
-		page = kvirt_to_pa(pos);
-		if (remap_page_range(vma, start, page, PAGE_SIZE, PAGE_SHARED)) {
+		page = page_to_pfn(vmalloc_to_page(pos));
+		if (remap_pfn_range(vma, start, page, PAGE_SIZE, PAGE_SHARED)) {
 			up(&cam->busy_lock);
 			return -EAGAIN;
 		}
Index: mm2-2.6.9-rc2/drivers/media/video/meye.c
===================================================================
--- mm2-2.6.9-rc2.orig/drivers/media/video/meye.c	2004-09-12 22:32:54.000000000 -0700
+++ mm2-2.6.9-rc2/drivers/media/video/meye.c	2004-09-23 18:21:10.792935210 -0700
@@ -115,19 +115,6 @@
 /****************************************************************************/
 /* Memory allocation routines (stolen from bttv-driver.c)                   */
 /****************************************************************************/
-
-/* Here we want the physical address of the memory.
- * This is used when initializing the contents of the area.
- */
-static inline unsigned long kvirt_to_pa(unsigned long adr) {
-        unsigned long kva, ret;
-
-        kva = (unsigned long) page_address(vmalloc_to_page((void *)adr));
-	kva |= adr & (PAGE_SIZE-1); /* restore the offset */
-	ret = __pa(kva);
-        return ret;
-}
-
 static void *rvmalloc(unsigned long size) {
 	void *mem;
 	unsigned long adr;
@@ -1201,8 +1188,8 @@
 	pos = (unsigned long)meye.grab_fbuffer;
 
 	while (size > 0) {
-		page = kvirt_to_pa(pos);
-		if (remap_page_range(vma, start, page, PAGE_SIZE, PAGE_SHARED)) {
+		page = page_to_pfn(vmalloc_to_page(pos));
+		if (remap_pfn_range(vma, start, page, PAGE_SIZE, PAGE_SHARED)) {
 			up(&meye.lock);
 			return -EAGAIN;
 		}
Index: mm2-2.6.9-rc2/drivers/media/video/zoran_driver.c
===================================================================
--- mm2-2.6.9-rc2.orig/drivers/media/video/zoran_driver.c	2004-09-12 22:33:11.000000000 -0700
+++ mm2-2.6.9-rc2/drivers/media/video/zoran_driver.c	2004-09-23 18:26:07.463834378 -0700
@@ -4450,12 +4450,6 @@
 	.close = zoran_vm_close,
 };
 
-#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
-#define zr_remap_page_range(a,b,c,d,e) remap_page_range(b,c,d,e)
-#else
-#define zr_remap_page_range(a,b,c,d,e) remap_page_range(a,b,c,d,e)
-#endif
-
 static int
 zoran_mmap (struct file           *file,
 	    struct vm_area_struct *vma)
@@ -4555,12 +4549,13 @@
 				pos =
 				    (unsigned long) fh->jpg_buffers.
 				    buffer[i].frag_tab[2 * j];
-				page = virt_to_phys(bus_to_virt(pos));	/* should just be pos on i386 */
-				if (zr_remap_page_range
-				    (vma, start, page, todo, PAGE_SHARED)) {
+				/* should just be pos >> PAGE_SHIFT on i386 */
+				page = virt_to_phys(bus_to_virt(pos));
+				page >>= PAGE_SHIFT;
+				if (remap_pfn_range(vma, start, page, todo, PAGE_SHARED)) {
 					dprintk(1,
 						KERN_ERR
-						"%s: zoran_mmap(V4L) - remap_page_range failed\n",
+						"%s: zoran_mmap(V4L) - remap_pfn_range failed\n",
 						ZR_DEVNAME(zr));
 					res = -EAGAIN;
 					goto jpg_mmap_unlock_and_return;
@@ -4641,11 +4636,11 @@
 			if (todo > fh->v4l_buffers.buffer_size)
 				todo = fh->v4l_buffers.buffer_size;
 			page = fh->v4l_buffers.buffer[i].fbuffer_phys;
-			if (zr_remap_page_range
-			    (vma, start, page, todo, PAGE_SHARED)) {
+			page >>= PAGE_SHIFT
+			if (remap_pfn_range(vma, start, page, todo, PAGE_SHARED)) {
 				dprintk(1,
 					KERN_ERR
-					"%s: zoran_mmap(V4L)i - remap_page_range failed\n",
+					"%s: zoran_mmap(V4L)i - remap_pfn_range failed\n",
 					ZR_DEVNAME(zr));
 				res = -EAGAIN;
 				goto v4l_mmap_unlock_and_return;
Index: mm2-2.6.9-rc2/drivers/char/mem.c
===================================================================
--- mm2-2.6.9-rc2.orig/drivers/char/mem.c	2004-09-22 21:32:14.000000000 -0700
+++ mm2-2.6.9-rc2/drivers/char/mem.c	2004-09-23 18:42:29.540536026 -0700
@@ -227,8 +227,8 @@
 	 */
 	vma->vm_flags |= VM_RESERVED|VM_IO;
 
-	if (remap_page_range(vma, vma->vm_start, offset,
-			vma->vm_end-vma->vm_start, vma->vm_page_prot))
+	if (remap_pfn_range(vma, vma->vm_start, offset >> PAGE_SHIFT,
+				vma->vm_end-vma->vm_start, vma->vm_page_prot))
 		return -EAGAIN;
 	return 0;
 }
Index: mm2-2.6.9-rc2/drivers/char/ftape/lowlevel/ftape-ctl.c
===================================================================
--- mm2-2.6.9-rc2.orig/drivers/char/ftape/lowlevel/ftape-ctl.c	2004-09-12 22:33:37.000000000 -0700
+++ mm2-2.6.9-rc2/drivers/char/ftape/lowlevel/ftape-ctl.c	2004-09-23 18:27:51.194064986 -0700
@@ -726,9 +726,9 @@
 		ftape_reset_buffer();
 	}
 	for (i = 0; i < num_buffers; i++) {
-		TRACE_CATCH(remap_page_range(vma, vma->vm_start +
+		TRACE_CATCH(remap_pfn_range(vma, vma->vm_start +
 					     i * FT_BUFF_SIZE,
-					     virt_to_phys(ft_buffer[i]->address),
+					     virt_to_phys(ft_buffer[i]->address) >> PAGE_SHIFT,
 					     FT_BUFF_SIZE,
 					     vma->vm_page_prot),
 			    _res = -EAGAIN);
Index: mm2-2.6.9-rc2/drivers/media/video/planb.c
===================================================================
--- mm2-2.6.9-rc2.orig/drivers/media/video/planb.c	2004-09-12 22:33:11.000000000 -0700
+++ mm2-2.6.9-rc2/drivers/media/video/planb.c	2004-09-23 18:27:05.632991322 -0700
@@ -1996,7 +1996,8 @@
 			return err;
 	}
 	for (i = 0; i < pb->rawbuf_size; i++) {
-		if (remap_page_range(vma, start, virt_to_phys((void *)pb->rawbuf[i]),
+		if (remap_pfn_range(vma, start,
+			virt_to_phys((void *)pb->rawbuf[i]) >> PAGE_SHIFT,
 						PAGE_SIZE, PAGE_SHARED))
 			return -EAGAIN;
 		start += PAGE_SIZE;
Index: mm2-2.6.9-rc2/drivers/char/drm/i830_dma.c
===================================================================
--- mm2-2.6.9-rc2.orig/drivers/char/drm/i830_dma.c	2004-09-22 21:31:13.000000000 -0700
+++ mm2-2.6.9-rc2/drivers/char/drm/i830_dma.c	2004-09-23 18:43:08.769572306 -0700
@@ -139,8 +139,8 @@
    	buf_priv->currently_mapped = I830_BUF_MAPPED;
 	unlock_kernel();
 
-	if (remap_page_range(DRM_RPR_ARG(vma) vma->vm_start,
-			     VM_OFFSET(vma),
+	if (remap_pfn_range(DRM_RPR_ARG(vma) vma->vm_start,
+			     VM_OFFSET(vma) >> PAGE_SHIFT,
 			     vma->vm_end - vma->vm_start,
 			     vma->vm_page_prot)) return -EAGAIN;
 	return 0;
Index: mm2-2.6.9-rc2/drivers/char/hpet.c
===================================================================
--- mm2-2.6.9-rc2.orig/drivers/char/hpet.c	2004-09-12 22:32:54.000000000 -0700
+++ mm2-2.6.9-rc2/drivers/char/hpet.c	2004-09-23 18:32:04.475560346 -0700
@@ -271,11 +271,11 @@
 
 	vma->vm_flags |= VM_IO;
 	vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
-	addr = __pa(addr);
+	addr = __pa(addr) >> PAGE_SHIFT;
 
-	if (remap_page_range
-	    (vma, vma->vm_start, addr, PAGE_SIZE, vma->vm_page_prot)) {
-		printk(KERN_ERR "remap_page_range failed in hpet.c\n");
+	if (remap_pfn_range(vma, vma->vm_start, addr, PAGE_SIZE,
+							vma->vm_page_prot)) {
+		printk(KERN_ERR "remap_pfn_range failed in hpet.c\n");
 		return -EAGAIN;
 	}
 
Index: mm2-2.6.9-rc2/drivers/char/agp/frontend.c
===================================================================
--- mm2-2.6.9-rc2.orig/drivers/char/agp/frontend.c	2004-09-12 22:31:44.000000000 -0700
+++ mm2-2.6.9-rc2/drivers/char/agp/frontend.c	2004-09-23 18:30:18.515668698 -0700
@@ -627,8 +627,8 @@
 		DBG("client vm_ops=%p", kerninfo.vm_ops);
 		if (kerninfo.vm_ops) {
 			vma->vm_ops = kerninfo.vm_ops;
-		} else if (remap_page_range(vma, vma->vm_start, 
-					    (kerninfo.aper_base + offset),
+		} else if (remap_pfn_range(vma, vma->vm_start, 
+				(kerninfo.aper_base + offset) >> PAGE_SHIFT,
 					    size, vma->vm_page_prot)) {
 			goto out_again;
 		}
@@ -643,8 +643,8 @@
 		DBG("controller vm_ops=%p", kerninfo.vm_ops);
 		if (kerninfo.vm_ops) {
 			vma->vm_ops = kerninfo.vm_ops;
-		} else if (remap_page_range(vma, vma->vm_start, 
-					    kerninfo.aper_base,
+		} else if (remap_pfn_range(vma, vma->vm_start, 
+					    kerninfo.aper_base >> PAGE_SHIFT,
 					    size, vma->vm_page_prot)) {
 			goto out_again;
 		}
Index: mm2-2.6.9-rc2/drivers/char/drm/i810_dma.c
===================================================================
--- mm2-2.6.9-rc2.orig/drivers/char/drm/i810_dma.c	2004-09-22 21:31:13.000000000 -0700
+++ mm2-2.6.9-rc2/drivers/char/drm/i810_dma.c	2004-09-23 18:43:26.510875218 -0700
@@ -138,8 +138,8 @@
    	buf_priv->currently_mapped = I810_BUF_MAPPED;
 	unlock_kernel();
 
-	if (remap_page_range(DRM_RPR_ARG(vma) vma->vm_start,
-			     VM_OFFSET(vma),
+	if (remap_pfn_range(DRM_RPR_ARG(vma) vma->vm_start,
+			     VM_OFFSET(vma) >> PAGE_SHIFT,
 			     vma->vm_end - vma->vm_start,
 			     vma->vm_page_prot)) return -EAGAIN;
 	return 0;
Index: mm2-2.6.9-rc2/drivers/char/drm/drm_vm.h
===================================================================
--- mm2-2.6.9-rc2.orig/drivers/char/drm/drm_vm.h	2004-09-12 22:33:39.000000000 -0700
+++ mm2-2.6.9-rc2/drivers/char/drm/drm_vm.h	2004-09-23 18:43:53.647749786 -0700
@@ -620,8 +620,8 @@
 					vma->vm_end - vma->vm_start,
 					vma->vm_page_prot, 0))
 #else
-		if (remap_page_range(DRM_RPR_ARG(vma) vma->vm_start,
-				     VM_OFFSET(vma) + offset,
+		if (remap_pfn_range(DRM_RPR_ARG(vma) vma->vm_start,
+				     (VM_OFFSET(vma) + offset) >> PAGE_SHIFT,
 				     vma->vm_end - vma->vm_start,
 				     vma->vm_page_prot))
 #endif
Index: mm2-2.6.9-rc2/drivers/perfctr/virtual.c
===================================================================
--- mm2-2.6.9-rc2.orig/drivers/perfctr/virtual.c	2004-09-22 21:31:46.000000000 -0700
+++ mm2-2.6.9-rc2/drivers/perfctr/virtual.c	2004-09-23 18:40:42.781765826 -0700
@@ -720,7 +720,8 @@
 	perfctr = filp->private_data;
 	if (!perfctr)
 		return -EPERM;
-	return remap_page_range(vma, vma->vm_start, virt_to_phys(perfctr),
+	return remap_pfn_range(vma, vma->vm_start,
+				virt_to_phys(perfctr) >> PAGE_SHIFT,
 				PAGE_SIZE, vma->vm_page_prot);
 }
 
Index: mm2-2.6.9-rc2/drivers/sbus/char/flash.c
===================================================================
--- mm2-2.6.9-rc2.orig/drivers/sbus/char/flash.c	2004-09-22 21:31:13.000000000 -0700
+++ mm2-2.6.9-rc2/drivers/sbus/char/flash.c	2004-09-23 18:40:15.670887306 -0700
@@ -75,7 +75,8 @@
 	pgprot_val(vma->vm_page_prot) |= _PAGE_E;
 	vma->vm_flags |= (VM_SHM | VM_LOCKED);
 
-	if (remap_page_range(vma, vma->vm_start, addr, size, vma->vm_page_prot))
+	if (remap_pfn_range(vma, vma->vm_start, addr >> PAGE_SHIFT,
+						size, vma->vm_page_prot))
 		return -EAGAIN;
 		
 	return 0;
Index: mm2-2.6.9-rc2/drivers/usb/media/ov511.c
===================================================================
--- mm2-2.6.9-rc2.orig/drivers/usb/media/ov511.c	2004-09-22 21:31:31.000000000 -0700
+++ mm2-2.6.9-rc2/drivers/usb/media/ov511.c	2004-09-23 18:35:48.885444858 -0700
@@ -4771,9 +4771,8 @@
 
 	pos = (unsigned long)ov->fbuf;
 	while (size > 0) {
-		page = kvirt_to_pa(pos);
-		if (remap_page_range(vma, start, page, PAGE_SIZE,
-				     PAGE_SHARED)) {
+		page = page_to_pfn(vmalloc_to_page(pos));
+		if (remap_pfn_range(vma, start, page, PAGE_SIZE, PAGE_SHARED)) {
 			up(&ov->lock);
 			return -EAGAIN;
 		}
Index: mm2-2.6.9-rc2/drivers/usb/media/se401.c
===================================================================
--- mm2-2.6.9-rc2.orig/drivers/usb/media/se401.c	2004-09-22 21:31:31.000000000 -0700
+++ mm2-2.6.9-rc2/drivers/usb/media/se401.c	2004-09-23 18:35:23.295335146 -0700
@@ -65,20 +65,6 @@
  * Memory management
  *
  **********************************************************************/
-
-/* Here we want the physical address of the memory.
- * This is used when initializing the contents of the area.
- */
-static inline unsigned long kvirt_to_pa(unsigned long adr)
-{
-	unsigned long kva, ret;
-
-	kva = (unsigned long) page_address(vmalloc_to_page((void *)adr));
-	kva |= adr & (PAGE_SIZE-1); /* restore the offset */
-	ret = __pa(kva);
-	return ret;
-}
-
 static void *rvmalloc(unsigned long size)
 {
 	void *mem;
@@ -1182,8 +1168,8 @@
 	}
 	pos = (unsigned long)se401->fbuf;
 	while (size > 0) {
-		page = kvirt_to_pa(pos);
-		if (remap_page_range(vma, start, page, PAGE_SIZE, PAGE_SHARED)) {
+		page = page_to_pfn(vmalloc_to_page(pos));
+		if (remap_pfn_range(vma, start, page, PAGE_SIZE, PAGE_SHARED)) {
 			up(&se401->lock);
 			return -EAGAIN;
 		}
Index: mm2-2.6.9-rc2/arch/ppc/kernel/pci.c
===================================================================
--- mm2-2.6.9-rc2.orig/arch/ppc/kernel/pci.c	2004-09-22 21:32:58.000000000 -0700
+++ mm2-2.6.9-rc2/arch/ppc/kernel/pci.c	2004-09-23 18:41:46.463084794 -0700
@@ -1595,7 +1595,7 @@
 	__pci_mmap_set_flags(dev, vma, mmap_state);
 	__pci_mmap_set_pgprot(dev, vma, mmap_state, write_combine);
 
-	ret = remap_page_range(vma, vma->vm_start, vma->vm_pgoff << PAGE_SHIFT,
+	ret = remap_pfn_range(vma, vma->vm_start, vma->vm_pgoff,
 			       vma->vm_end - vma->vm_start, vma->vm_page_prot);
 
 	return ret;
Index: mm2-2.6.9-rc2/drivers/usb/media/sn9c102_core.c
===================================================================
--- mm2-2.6.9-rc2.orig/drivers/usb/media/sn9c102_core.c	2004-09-22 21:31:31.000000000 -0700
+++ mm2-2.6.9-rc2/drivers/usb/media/sn9c102_core.c	2004-09-23 18:34:50.744283658 -0700
@@ -101,18 +101,6 @@
 };
 
 /*****************************************************************************/
-
-static inline unsigned long kvirt_to_pa(unsigned long adr)
-{
-	unsigned long kva, ret;
-
-	kva = (unsigned long)page_address(vmalloc_to_page((void *)adr));
-	kva |= adr & (PAGE_SIZE-1);
-	ret = __pa(kva);
-	return ret;
-}
-
-
 static void* rvmalloc(size_t size)
 {
 	void* mem;
@@ -1568,8 +1556,8 @@
 
 	pos = (unsigned long)cam->frame[i].bufmem;
 	while (size > 0) { /* size is page-aligned */
-		page = kvirt_to_pa(pos);
-		if (remap_page_range(vma, start, page, PAGE_SIZE, 
+		page = page_to_pfn(vmalloc_to_page(pos));
+		if (remap_pfn_range(vma, start, page, PAGE_SIZE, 
 		                     vma->vm_page_prot)) {
 			up(&cam->fileop_sem);
 			return -EAGAIN;
Index: mm2-2.6.9-rc2/drivers/usb/class/audio.c
===================================================================
--- mm2-2.6.9-rc2.orig/drivers/usb/class/audio.c	2004-09-22 21:31:30.000000000 -0700
+++ mm2-2.6.9-rc2/drivers/usb/class/audio.c	2004-09-23 18:38:32.261607906 -0700
@@ -509,7 +509,7 @@
 			return -EINVAL;
 	db->mapped = 1;
 	for(nr = 0; nr < size; nr++) {
-		if (remap_page_range(vma, start, virt_to_phys(db->sgbuf[nr]), PAGE_SIZE, prot))
+		if (remap_pfn_range(vma, start, virt_to_phys(db->sgbuf[nr]) >> PAGE_SHIFT, PAGE_SIZE, prot))
 			return -EAGAIN;
 		start += PAGE_SIZE;
 	}
Index: mm2-2.6.9-rc2/drivers/usb/media/w9968cf.c
===================================================================
--- mm2-2.6.9-rc2.orig/drivers/usb/media/w9968cf.c	2004-09-12 22:33:11.000000000 -0700
+++ mm2-2.6.9-rc2/drivers/usb/media/w9968cf.c	2004-09-23 18:38:05.856622074 -0700
@@ -457,7 +457,6 @@
                                unsigned long arg);
 
 /* Memory management */
-static inline unsigned long kvirt_to_pa(unsigned long adr);
 static void* rvmalloc(unsigned long size);
 static void rvfree(void *mem, unsigned long size);
 static void w9968cf_deallocate_memory(struct w9968cf_device*);
@@ -611,20 +610,6 @@
 /****************************************************************************
  * Memory management functions                                              *
  ****************************************************************************/
-
-/* Here we want the physical address of the memory.
-   This is used when initializing the contents of the area. */
-static inline unsigned long kvirt_to_pa(unsigned long adr)
-{
-	unsigned long kva, ret;
-
-	kva = (unsigned long) page_address(vmalloc_to_page((void *)adr));
-	kva |= adr & (PAGE_SIZE-1); /* restore the offset */
-	ret = __pa(kva);
-	return ret;
-}
-
-
 static void* rvmalloc(unsigned long size)
 {
 	void* mem;
@@ -2919,8 +2904,8 @@
 		return -EINVAL;
 
 	while (vsize > 0) {
-		page = kvirt_to_pa(pos) + vma->vm_pgoff;
-		if (remap_page_range(vma, start, page, PAGE_SIZE, 
+		page = page_to_pfn(vmalloc_to_page(pos)) + vma->vm_pgoff;
+		if (remap_pfn_range(vma, start, page, PAGE_SIZE, 
 		                     vma->vm_page_prot))
 			return -EAGAIN;
 		start += PAGE_SIZE;
Index: mm2-2.6.9-rc2/drivers/ieee1394/video1394.c
===================================================================
--- mm2-2.6.9-rc2.orig/drivers/ieee1394/video1394.c	2004-09-12 22:31:44.000000000 -0700
+++ mm2-2.6.9-rc2/drivers/ieee1394/video1394.c	2004-09-23 18:39:11.813595090 -0700
@@ -1157,7 +1157,7 @@
  *
  *  FIXME:
  *  - PAGE_READONLY should suffice!?
- *  - remap_page_range is kind of inefficient for page by page remapping.
+ *  - remap_pfn_range is kind of inefficient for page by page remapping.
  *    But e.g. pte_alloc() does not work in modules ... :-(
  */
 
Index: mm2-2.6.9-rc2/net/packet/af_packet.c
===================================================================
--- mm2-2.6.9-rc2.orig/net/packet/af_packet.c	2004-09-12 22:32:55.000000000 -0700
+++ mm2-2.6.9-rc2/net/packet/af_packet.c	2004-09-23 18:41:11.100460730 -0700
@@ -1729,7 +1729,8 @@
 	start = vma->vm_start;
 	err = -EAGAIN;
 	for (i=0; i<po->pg_vec_len; i++) {
-		if (remap_page_range(vma, start, __pa(po->pg_vec[i]),
+		if (remap_pfn_range(vma, start,
+				     __pa(po->pg_vec[i]) >> PAGE_SHIFT,
 				     po->pg_vec_pages*PAGE_SIZE,
 				     vma->vm_page_prot))
 			goto out;
Index: mm2-2.6.9-rc2/drivers/usb/media/vicam.c
===================================================================
--- mm2-2.6.9-rc2.orig/drivers/usb/media/vicam.c	2004-09-12 22:32:00.000000000 -0700
+++ mm2-2.6.9-rc2/drivers/usb/media/vicam.c	2004-09-23 18:36:41.779403754 -0700
@@ -351,16 +351,6 @@
 	0x46, 0x05, 0x6C, 0x05, 0x00, 0x00
 };
 
-static unsigned long kvirt_to_pa(unsigned long adr)
-{
-	unsigned long kva, ret;
-
-	kva = (unsigned long) page_address(vmalloc_to_page((void *)adr));
-	kva |= adr & (PAGE_SIZE-1); /* restore the offset */
-	ret = __pa(kva);
-	return ret;
-}
-
 /* rvmalloc / rvfree copied from usbvideo.c
  *
  * Not sure why these are not yet non-statics which I can reference through
@@ -1055,8 +1045,8 @@
 
 	pos = (unsigned long)cam->framebuf;
 	while (size > 0) {
-		page = kvirt_to_pa(pos);
-		if (remap_page_range(vma, start, page, PAGE_SIZE, PAGE_SHARED))
+		page = page_to_pfn(vmalloc_to_page(pos));
+		if (remap_pfn_range(vma, start, page, PAGE_SIZE, PAGE_SHARED))
 			return -EAGAIN;
 
 		start += PAGE_SIZE;
Index: mm2-2.6.9-rc2/drivers/char/mmtimer.c
===================================================================
--- mm2-2.6.9-rc2.orig/drivers/char/mmtimer.c	2004-09-22 21:31:16.000000000 -0700
+++ mm2-2.6.9-rc2/drivers/char/mmtimer.c	2004-09-23 18:33:49.800548514 -0700
@@ -139,7 +139,7 @@
  * @file: file structure for the device
  * @vma: VMA to map the registers into
  *
- * Calls remap_page_range() to map the clock's registers into
+ * Calls remap_pfn_range() to map the clock's registers into
  * the calling process' address space.
  */
 static int mmtimer_mmap(struct file *file, struct vm_area_struct *vma)
@@ -162,9 +162,9 @@
 	mmtimer_addr &= ~(PAGE_SIZE - 1);
 	mmtimer_addr &= 0xfffffffffffffffUL;
 
-	if (remap_page_range(vma, vma->vm_start, mmtimer_addr, PAGE_SIZE,
-			     vma->vm_page_prot)) {
-		printk(KERN_ERR "remap_page_range failed in mmtimer.c\n");
+	if (remap_pfn_range(vma, vma->vm_start, mmtimer_addr >> PAGE_SHIFT,
+					PAGE_SIZE, vma->vm_page_prot)) {
+		printk(KERN_ERR "remap_pfn_range failed in mmtimer.c\n");
 		return -EAGAIN;
 	}
 
Index: mm2-2.6.9-rc2/drivers/usb/media/stv680.c
===================================================================
--- mm2-2.6.9-rc2.orig/drivers/usb/media/stv680.c	2004-09-22 21:31:31.000000000 -0700
+++ mm2-2.6.9-rc2/drivers/usb/media/stv680.c	2004-09-23 18:37:21.838313874 -0700
@@ -118,20 +118,6 @@
  *
  * And the STV0680 driver - Kevin
  ********************************************************************/
-
-/* Here we want the physical address of the memory.
- * This is used when initializing the contents of the area.
- */
-static inline unsigned long kvirt_to_pa (unsigned long adr)
-{
-	unsigned long kva, ret;
-
-	kva = (unsigned long) page_address(vmalloc_to_page((void *)adr));
-	kva |= adr & (PAGE_SIZE-1); /* restore the offset */
-	ret = __pa(kva);
-	return ret;
-}
-
 static void *rvmalloc (unsigned long size)
 {
 	void *mem;
@@ -1291,8 +1277,8 @@
 	}
 	pos = (unsigned long) stv680->fbuf;
 	while (size > 0) {
-		page = kvirt_to_pa (pos);
-		if (remap_page_range (vma, start, page, PAGE_SIZE, PAGE_SHARED)) {
+		page = page_to_pfn(vmalloc_to_page(pos));
+		if (remap_pfn_range (vma, start, page, PAGE_SIZE, PAGE_SHARED)) {
 			up (&stv680->lock);
 			return -EAGAIN;
 		}
Index: mm2-2.6.9-rc2/drivers/sbus/char/jsflash.c
===================================================================
--- mm2-2.6.9-rc2.orig/drivers/sbus/char/jsflash.c	2004-09-12 22:32:26.000000000 -0700
+++ mm2-2.6.9-rc2/drivers/sbus/char/jsflash.c	2004-09-23 18:39:32.934384242 -0700
@@ -21,7 +21,7 @@
  * as a silly safeguard.
  *
  * XXX The flash.c manipulates page caching characteristics in a certain
- * dubious way; also it assumes that remap_page_range() can remap
+ * dubious way; also it assumes that remap_pfn_range() can remap
  * PCI bus locations, which may be false. ioremap() must be used
  * instead. We should discuss this.
  */
Index: mm2-2.6.9-rc2/arch/sparc/mm/generic.c
===================================================================
--- mm2-2.6.9-rc2.orig/arch/sparc/mm/generic.c	2004-09-12 22:33:23.000000000 -0700
+++ mm2-2.6.9-rc2/arch/sparc/mm/generic.c	2004-09-23 18:52:35.038486346 -0700
@@ -41,7 +41,7 @@
 #endif
 }
 
-/* Remap IO memory, the same way as remap_page_range(), but use
+/* Remap IO memory, the same way as remap_pfn_range(), but use
  * the obio memory space.
  *
  * They use a pgprot that sets PAGE_IO and does not check the
Index: mm2-2.6.9-rc2/sound/oss/es1371.c
===================================================================
--- mm2-2.6.9-rc2.orig/sound/oss/es1371.c	2004-09-12 22:33:11.000000000 -0700
+++ mm2-2.6.9-rc2/sound/oss/es1371.c	2004-09-23 19:04:22.976863354 -0700
@@ -910,7 +910,7 @@
 		if (!db->rawbuf)
 			return -ENOMEM;
 		db->buforder = order;
-		/* now mark the pages as reserved; otherwise remap_page_range doesn't do what we want */
+		/* now mark the pages as reserved; otherwise remap_pfn_range doesn't do what we want */
 		pend = virt_to_page(db->rawbuf + (PAGE_SIZE << db->buforder) - 1);
 		for (page = virt_to_page(db->rawbuf); page <= pend; page++)
 			SetPageReserved(page);
@@ -1555,7 +1555,9 @@
 		ret = -EINVAL;
 		goto out;
 	}
-	if (remap_page_range(vma, vma->vm_start, virt_to_phys(db->rawbuf), size, vma->vm_page_prot)) {
+	if (remap_pfn_range(vma, vma->vm_start,
+				virt_to_phys(db->rawbuf) >> PAGE_SHIFT,
+				size, vma->vm_page_prot)) {
 		ret = -EAGAIN;
 		goto out;
 	}
@@ -2128,7 +2130,9 @@
 	if (size > (PAGE_SIZE << s->dma_dac1.buforder))
 		goto out;
 	ret = -EAGAIN;
-	if (remap_page_range(vma, vma->vm_start, virt_to_phys(s->dma_dac1.rawbuf), size, vma->vm_page_prot))
+	if (remap_pfn_range(vma, vma->vm_start,
+				virt_to_phys(s->dma_dac1.rawbuf) >> PAGE_SHIFT,
+				size, vma->vm_page_prot))
 		goto out;
 	s->dma_dac1.mapped = 1;
 	ret = 0;
Index: mm2-2.6.9-rc2/sound/oss/forte.c
===================================================================
--- mm2-2.6.9-rc2.orig/sound/oss/forte.c	2004-09-12 22:32:16.000000000 -0700
+++ mm2-2.6.9-rc2/sound/oss/forte.c	2004-09-23 19:00:28.927444274 -0700
@@ -1409,7 +1409,8 @@
                 goto out;
 	}
 
-        if (remap_page_range (vma, vma->vm_start, virt_to_phys (channel->buf),
+        if (remap_pfn_range(vma, vma->vm_start,
+			      virt_to_phys(channel->buf) >> PAGE_SHIFT,
 			      size, vma->vm_page_prot)) {
 		DPRINTK ("%s: remap el a no worko\n", __FUNCTION__);
 		ret = -EAGAIN;
Index: mm2-2.6.9-rc2/sound/oss/cs4281/cs4281m.c
===================================================================
--- mm2-2.6.9-rc2.orig/sound/oss/cs4281/cs4281m.c	2004-09-12 22:33:38.000000000 -0700
+++ mm2-2.6.9-rc2/sound/oss/cs4281/cs4281m.c	2004-09-23 18:58:56.406509594 -0700
@@ -1755,7 +1755,7 @@
 		}
 		db->buforder = order;
 		// Now mark the pages as reserved; otherwise the 
-		// remap_page_range() in cs4281_mmap doesn't work.
+		// remap_pfn_range() in cs4281_mmap doesn't work.
 		// 1. get index to last page in mem_map array for rawbuf.
 		mapend = virt_to_page(db->rawbuf + 
 			(PAGE_SIZE << db->buforder) - 1);
@@ -1778,7 +1778,7 @@
 		}
 		s->buforder_tmpbuff = order;
 		// Now mark the pages as reserved; otherwise the 
-		// remap_page_range() in cs4281_mmap doesn't work.
+		// remap_pfn_range() in cs4281_mmap doesn't work.
 		// 1. get index to last page in mem_map array for rawbuf.
 		mapend = virt_to_page(s->tmpbuff + 
 				(PAGE_SIZE << s->buforder_tmpbuff) - 1);
@@ -3135,9 +3135,10 @@
 	size = vma->vm_end - vma->vm_start;
 	if (size > (PAGE_SIZE << db->buforder))
 		return -EINVAL;
-	if (remap_page_range
-	    (vma, vma->vm_start, virt_to_phys(db->rawbuf), size,
-	     vma->vm_page_prot)) return -EAGAIN;
+	if (remap_pfn_range(vma, vma->vm_start,
+				virt_to_phys(db->rawbuf) >> PAGE_SHIFT,
+				size, vma->vm_page_prot))
+		return -EAGAIN;
 	db->mapped = 1;
 
 	CS_DBGOUT(CS_FUNCTION | CS_PARMS | CS_OPEN, 4,
Index: mm2-2.6.9-rc2/arch/ia64/pci/pci.c
===================================================================
--- mm2-2.6.9-rc2.orig/arch/ia64/pci/pci.c	2004-09-22 21:32:58.000000000 -0700
+++ mm2-2.6.9-rc2/arch/ia64/pci/pci.c	2004-09-23 18:56:00.210295490 -0700
@@ -498,7 +498,7 @@
 	else
 		vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
 
-	if (remap_page_range(vma, vma->vm_start, vma->vm_pgoff << PAGE_SHIFT,
+	if (remap_pfn_range(vma, vma->vm_start, vma->vm_pgoff,
 			     vma->vm_end - vma->vm_start, vma->vm_page_prot))
 		return -EAGAIN;
 
Index: mm2-2.6.9-rc2/sound/oss/au1000.c
===================================================================
--- mm2-2.6.9-rc2.orig/sound/oss/au1000.c	2004-09-12 22:32:55.000000000 -0700
+++ mm2-2.6.9-rc2/sound/oss/au1000.c	2004-09-23 19:03:18.190712346 -0700
@@ -629,7 +629,7 @@
 			return -ENOMEM;
 		db->buforder = order;
 		/* now mark the pages as reserved;
-		   otherwise remap_page_range doesn't do what we want */
+		   otherwise remap_pfn_range doesn't do what we want */
 		pend = virt_to_page(db->rawbuf +
 				    (PAGE_SIZE << db->buforder) - 1);
 		for (page = virt_to_page(db->rawbuf); page <= pend; page++)
@@ -1338,7 +1338,8 @@
 		ret = -EINVAL;
 		goto out;
 	}
-	if (remap_page_range(vma->vm_start, virt_to_phys(db->rawbuf),
+	if (remap_pfn_range(vma->vm_start,
+			     virt_to_phys(db->rawbuf) >> PAGE_SHIFT,
 			     size, vma->vm_page_prot)) {
 		ret = -EAGAIN;
 		goto out;
Index: mm2-2.6.9-rc2/sound/oss/cs46xx.c
===================================================================
--- mm2-2.6.9-rc2.orig/sound/oss/cs46xx.c	2004-09-12 22:31:26.000000000 -0700
+++ mm2-2.6.9-rc2/sound/oss/cs46xx.c	2004-09-23 18:57:27.361046562 -0700
@@ -1190,7 +1190,7 @@
 	dmabuf->buforder = order;
 	dmabuf->rawbuf = rawbuf;
 	// Now mark the pages as reserved; otherwise the 
-	// remap_page_range() in cs46xx_mmap doesn't work.
+	// remap_pfn_range() in cs46xx_mmap doesn't work.
 	// 1. get index to last page in mem_map array for rawbuf.
 	mapend = virt_to_page(dmabuf->rawbuf + 
 		(PAGE_SIZE << dmabuf->buforder) - 1);
@@ -1227,7 +1227,7 @@
 	dmabuf->buforder_tmpbuff = order;
 	
 	// Now mark the pages as reserved; otherwise the 
-	// remap_page_range() in cs46xx_mmap doesn't work.
+	// remap_pfn_range() in cs46xx_mmap doesn't work.
 	// 1. get index to last page in mem_map array for rawbuf.
 	mapend = virt_to_page(dmabuf->tmpbuff + 
 		(PAGE_SIZE << dmabuf->buforder_tmpbuff) - 1);
@@ -2452,7 +2452,8 @@
 		ret = -EINVAL;
 		goto out;
 	}
-	if (remap_page_range(vma, vma->vm_start, virt_to_phys(dmabuf->rawbuf),
+	if (remap_pfn_range(vma, vma->vm_start,
+			     virt_to_phys(dmabuf->rawbuf) >> PAGE_SHIFT,
 			     size, vma->vm_page_prot))
 	{
 		ret = -EAGAIN;
Index: mm2-2.6.9-rc2/sound/oss/esssolo1.c
===================================================================
--- mm2-2.6.9-rc2.orig/sound/oss/esssolo1.c	2004-09-12 22:31:43.000000000 -0700
+++ mm2-2.6.9-rc2/sound/oss/esssolo1.c	2004-09-23 18:59:24.483241282 -0700
@@ -445,7 +445,7 @@
 		if (!db->rawbuf)
 			return -ENOMEM;
 		db->buforder = order;
-		/* now mark the pages as reserved; otherwise remap_page_range doesn't do what we want */
+		/* now mark the pages as reserved; otherwise remap_pfn_range doesn't do what we want */
 		pend = virt_to_page(db->rawbuf + (PAGE_SIZE << db->buforder) - 1);
 		for (page = virt_to_page(db->rawbuf); page <= pend; page++)
 			SetPageReserved(page);
@@ -1242,7 +1242,7 @@
 	if (size > (PAGE_SIZE << db->buforder))
 		goto out;
 	ret = -EAGAIN;
-	if (remap_page_range(vma, vma->vm_start, virt_to_phys(db->rawbuf), size, vma->vm_page_prot))
+	if (remap_pfn_range(vma, vma->vm_start, virt_to_phys(db->rawbuf) >> PAGE_SHIFT, size, vma->vm_page_prot))
 		goto out;
 	db->mapped = 1;
 	ret = 0;
Index: mm2-2.6.9-rc2/arch/ppc/kernel/machine_kexec.c
===================================================================
--- mm2-2.6.9-rc2.orig/arch/ppc/kernel/machine_kexec.c	2004-09-22 21:32:12.000000000 -0700
+++ mm2-2.6.9-rc2/arch/ppc/kernel/machine_kexec.c	2004-09-23 18:52:16.553296522 -0700
@@ -56,8 +56,10 @@
 	vma->vm_private_data = NULL;
 	insert_vm_struct(mm, vma);
 
-	error = remap_page_range(vma, vma->vm_start, vma->vm_start,
-		vma->vm_end - vma->vm_start, vma->vm_page_prot);
+	error = remap_pfn_range(vma,
+				vma->vm_start,
+				vma->vm_start >> PAGE_SHIFT,
+				vma->vm_end - vma->vm_start, vma->vm_page_prot);
 	if (error) {
 		goto out;
 	}
Index: mm2-2.6.9-rc2/arch/um/drivers/mmapper_kern.c
===================================================================
--- mm2-2.6.9-rc2.orig/arch/um/drivers/mmapper_kern.c	2004-09-12 22:31:43.000000000 -0700
+++ mm2-2.6.9-rc2/arch/um/drivers/mmapper_kern.c	2004-09-23 18:53:49.572155506 -0700
@@ -81,10 +81,10 @@
 	size = vma->vm_end - vma->vm_start;
 	if(size > mmapper_size) return(-EFAULT);
 
-	/* XXX A comment above remap_page_range says it should only be
+	/* XXX A comment above remap_pfn_range says it should only be
 	 * called when the mm semaphore is held
 	 */
-	if (remap_page_range(vma, vma->vm_start, p_buf, size, 
+	if (remap_pfn_range(vma, vma->vm_start, p_buf >> PAGE_SHIFT, size, 
 			     vma->vm_page_prot))
 		goto out;
 	ret = 0;
Index: mm2-2.6.9-rc2/arch/ppc64/kernel/proc_ppc64.c
===================================================================
--- mm2-2.6.9-rc2.orig/arch/ppc64/kernel/proc_ppc64.c	2004-09-12 22:33:11.000000000 -0700
+++ mm2-2.6.9-rc2/arch/ppc64/kernel/proc_ppc64.c	2004-09-23 18:56:34.533077634 -0700
@@ -176,7 +176,8 @@
 	if ((vma->vm_end - vma->vm_start) > dp->size)
 		return -EINVAL;
 
-	remap_page_range( vma, vma->vm_start, __pa(dp->data), dp->size, vma->vm_page_prot );
+	remap_pfn_range(vma, vma->vm_start, __pa(dp->data) >> PAGE_SHIFT,
+						dp->size, vma->vm_page_prot);
 	return 0;
 }
 
Index: mm2-2.6.9-rc2/sound/oss/ymfpci.c
===================================================================
--- mm2-2.6.9-rc2.orig/sound/oss/ymfpci.c	2004-09-12 22:32:54.000000000 -0700
+++ mm2-2.6.9-rc2/sound/oss/ymfpci.c	2004-09-23 19:02:44.629814378 -0700
@@ -334,7 +334,7 @@
 	dmabuf->dma_addr = dma_addr;
 	dmabuf->buforder = order;
 
-	/* now mark the pages as reserved; otherwise remap_page_range doesn't do what we want */
+	/* now mark the pages as reserved; otherwise remap_pfn_range doesn't do what we want */
 	mapend = virt_to_page(rawbuf + (PAGE_SIZE << order) - 1);
 	for (map = virt_to_page(rawbuf); map <= mapend; map++)
 		set_bit(PG_reserved, &map->flags);
@@ -1545,7 +1545,8 @@
 	size = vma->vm_end - vma->vm_start;
 	if (size > (PAGE_SIZE << dmabuf->buforder))
 		return -EINVAL;
-	if (remap_page_range(vma, vma->vm_start, virt_to_phys(dmabuf->rawbuf),
+	if (remap_pfn_range(vma, vma->vm_start,
+			     virt_to_phys(dmabuf->rawbuf) >> PAGE_SHIFT,
 			     size, vma->vm_page_prot))
 		return -EAGAIN;
 	dmabuf->mapped = 1;
Index: mm2-2.6.9-rc2/sound/oss/sonicvibes.c
===================================================================
--- mm2-2.6.9-rc2.orig/sound/oss/sonicvibes.c	2004-09-12 22:32:26.000000000 -0700
+++ mm2-2.6.9-rc2/sound/oss/sonicvibes.c	2004-09-23 19:01:33.553619602 -0700
@@ -756,7 +756,7 @@
 		if ((virt_to_bus(db->rawbuf) + (PAGE_SIZE << db->buforder) - 1) & ~0xffffff)
 			printk(KERN_DEBUG "sv: DMA buffer beyond 16MB: busaddr 0x%lx  size %ld\n", 
 			       virt_to_bus(db->rawbuf), PAGE_SIZE << db->buforder);
-		/* now mark the pages as reserved; otherwise remap_page_range doesn't do what we want */
+		/* now mark the pages as reserved; otherwise remap_pfn_range doesn't do what we want */
 		pend = virt_to_page(db->rawbuf + (PAGE_SIZE << db->buforder) - 1);
 		for (page = virt_to_page(db->rawbuf); page <= pend; page++)
 			SetPageReserved(page);
@@ -1549,7 +1549,7 @@
 	if (size > (PAGE_SIZE << db->buforder))
 		goto out;
 	ret = -EAGAIN;
-	if (remap_page_range(vma, vma->vm_start, virt_to_phys(db->rawbuf), size, vma->vm_page_prot))
+	if (remap_pfn_range(vma, vma->vm_start, virt_to_phys(db->rawbuf) >> PAGE_SHIFT, size, vma->vm_page_prot))
 		goto out;
 	db->mapped = 1;
 	ret = 0;
Index: mm2-2.6.9-rc2/sound/oss/ite8172.c
===================================================================
--- mm2-2.6.9-rc2.orig/sound/oss/ite8172.c	2004-09-12 22:31:57.000000000 -0700
+++ mm2-2.6.9-rc2/sound/oss/ite8172.c	2004-09-23 18:59:58.405084378 -0700
@@ -693,7 +693,7 @@
 			return -ENOMEM;
 		db->buforder = order;
 		/* now mark the pages as reserved;
-		   otherwise remap_page_range doesn't do what we want */
+		   otherwise remap_pfn_range doesn't do what we want */
 		pend = virt_to_page(db->rawbuf +
 				    (PAGE_SIZE << db->buforder) - 1);
 		for (page = virt_to_page(db->rawbuf); page <= pend; page++)
@@ -1311,7 +1311,8 @@
 		unlock_kernel();
 		return -EINVAL;
 	}
-	if (remap_page_range(vma, vma->vm_start, virt_to_phys(db->rawbuf),
+	if (remap_pfn_range(vma, vma->vm_start,
+			     virt_to_phys(db->rawbuf) >> PAGE_SHIFT,
 			     size, vma->vm_page_prot)) {
 		unlock_kernel();
 		return -EAGAIN;
Index: mm2-2.6.9-rc2/arch/i386/pci/i386.c
===================================================================
--- mm2-2.6.9-rc2.orig/arch/i386/pci/i386.c	2004-09-22 21:31:26.000000000 -0700
+++ mm2-2.6.9-rc2/arch/i386/pci/i386.c	2004-09-23 18:52:51.972911922 -0700
@@ -295,7 +295,7 @@
 	/* Write-combine setting is ignored, it is changed via the mtrr
 	 * interfaces on this platform.
 	 */
-	if (remap_page_range(vma, vma->vm_start, vma->vm_pgoff << PAGE_SHIFT,
+	if (remap_pfn_range(vma, vma->vm_start, vma->vm_pgoff,
 			     vma->vm_end - vma->vm_start,
 			     vma->vm_page_prot))
 		return -EAGAIN;
Index: mm2-2.6.9-rc2/arch/sparc64/mm/generic.c
===================================================================
--- mm2-2.6.9-rc2.orig/arch/sparc64/mm/generic.c	2004-09-12 22:33:22.000000000 -0700
+++ mm2-2.6.9-rc2/arch/sparc64/mm/generic.c	2004-09-23 18:53:04.403022258 -0700
@@ -23,7 +23,7 @@
 	}
 }
 
-/* Remap IO memory, the same way as remap_page_range(), but use
+/* Remap IO memory, the same way as remap_pfn_range(), but use
  * the obio memory space.
  *
  * They use a pgprot that sets PAGE_IO and does not check the
Index: mm2-2.6.9-rc2/arch/ia64/kernel/perfmon.c
===================================================================
--- mm2-2.6.9-rc2.orig/arch/ia64/kernel/perfmon.c	2004-09-12 22:33:36.000000000 -0700
+++ mm2-2.6.9-rc2/arch/ia64/kernel/perfmon.c	2004-09-23 18:55:40.828242010 -0700
@@ -572,12 +572,6 @@
 	ClearPageReserved(vmalloc_to_page((void*)a));
 }
 
-static inline int
-pfm_remap_page_range(struct vm_area_struct *vma, unsigned long from, unsigned long phys_addr, unsigned long size, pgprot_t prot)
-{
-	return remap_page_range(vma, from, phys_addr, size, prot);
-}
-
 static inline unsigned long
 pfm_protect_ctx_ctxsw(pfm_context_t *x)
 {
@@ -805,18 +799,6 @@
 	DPRINT(("ctx=%p msgq reset\n", ctx));
 }
 
-
-/* Here we want the physical address of the memory.
- * This is used when initializing the contents of the
- * area and marking the pages as reserved.
- */
-static inline unsigned long
-pfm_kvirt_to_pa(unsigned long adr)
-{
-	__u64 pa = ia64_tpa(adr);
-	return pa;
-}
-
 static void *
 pfm_rvmalloc(unsigned long size)
 {
@@ -2248,9 +2230,9 @@
 	DPRINT(("CPU%d buf=0x%lx addr=0x%lx size=%ld\n", smp_processor_id(), buf, addr, size));
 
 	while (size > 0) {
-		page = pfm_kvirt_to_pa(buf);
-
-		if (pfm_remap_page_range(vma, addr, page, PAGE_SIZE, PAGE_READONLY)) return -ENOMEM;
+		page = ia64_tpa(buf) >> PAGE_SHIFT;
+		if (remap_pfn_range(vma, addr, page, PAGE_SIZE, PAGE_READONLY))
+			return -ENOMEM;
 
 		addr  += PAGE_SIZE;
 		buf   += PAGE_SIZE;
Index: mm2-2.6.9-rc2/sound/oss/soundcard.c
===================================================================
--- mm2-2.6.9-rc2.orig/sound/oss/soundcard.c	2004-09-12 22:32:41.000000000 -0700
+++ mm2-2.6.9-rc2/sound/oss/soundcard.c	2004-09-23 19:01:57.540972970 -0700
@@ -463,7 +463,8 @@
 	if (size != dmap->bytes_in_use) {
 		printk(KERN_WARNING "Sound: mmap() size = %ld. Should be %d\n", size, dmap->bytes_in_use);
 	}
-	if (remap_page_range(vma, vma->vm_start, virt_to_phys(dmap->raw_buf),
+	if (remap_pfn_range(vma, vma->vm_start,
+		virt_to_phys(dmap->raw_buf) >> PAGE_SHIFT,
 		vma->vm_end - vma->vm_start,
 		vma->vm_page_prot)) {
 		unlock_kernel();
Index: mm2-2.6.9-rc2/arch/ppc64/kernel/pci.c
===================================================================
--- mm2-2.6.9-rc2.orig/arch/ppc64/kernel/pci.c	2004-09-22 21:32:58.000000000 -0700
+++ mm2-2.6.9-rc2/arch/ppc64/kernel/pci.c	2004-09-23 18:56:48.930888834 -0700
@@ -502,7 +502,7 @@
 	__pci_mmap_set_flags(dev, vma, mmap_state);
 	__pci_mmap_set_pgprot(dev, vma, mmap_state, write_combine);
 
-	ret = remap_page_range(vma, vma->vm_start, vma->vm_pgoff << PAGE_SHIFT,
+	ret = remap_pfn_range(vma, vma->vm_start, vma->vm_pgoff,
 			       vma->vm_end - vma->vm_start, vma->vm_page_prot);
 
 	return ret;
Index: mm2-2.6.9-rc2/arch/arm/kernel/bios32.c
===================================================================
--- mm2-2.6.9-rc2.orig/arch/arm/kernel/bios32.c	2004-09-22 21:32:58.000000000 -0700
+++ mm2-2.6.9-rc2/arch/arm/kernel/bios32.c	2004-09-23 18:53:22.362292034 -0700
@@ -694,7 +694,7 @@
 	vma->vm_flags |= VM_SHM | VM_LOCKED | VM_IO;
 	vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
 
-	if (remap_page_range(vma, vma->vm_start, phys,
+	if (remap_pfn_range(vma, vma->vm_start, phys >> PAGE_SHIFT,
 			     vma->vm_end - vma->vm_start,
 			     vma->vm_page_prot))
 		return -EAGAIN;
Index: mm2-2.6.9-rc2/sound/oss/cmpci.c
===================================================================
--- mm2-2.6.9-rc2.orig/sound/oss/cmpci.c	2004-09-12 22:32:48.000000000 -0700
+++ mm2-2.6.9-rc2/sound/oss/cmpci.c	2004-09-23 19:02:17.763898618 -0700
@@ -1393,7 +1393,7 @@
 		if (!db->rawbuf || !db->dmaaddr)
 			return -ENOMEM;
 		db->buforder = order;
-		/* now mark the pages as reserved; otherwise remap_page_range doesn't do what we want */
+		/* now mark the pages as reserved; otherwise remap_pfn_range doesn't do what we want */
 		pend = virt_to_page(db->rawbuf + (PAGE_SIZE << db->buforder) - 1);
 		for (pstart = virt_to_page(db->rawbuf); pstart <= pend; pstart++)
 			SetPageReserved(pstart);
@@ -2301,7 +2301,7 @@
 	if (size > (PAGE_SIZE << db->buforder))
 		goto out;
 	ret = -EINVAL;
-	if (remap_page_range(vma, vma->vm_start, virt_to_phys(db->rawbuf), size, vma->vm_page_prot))
+	if (remap_pfn_range(vma, vma->vm_start, virt_to_phys(db->rawbuf) >> PAGE_SHIFT, size, vma->vm_page_prot))
 		goto out;
 	db->mapped = 1;
 	ret = 0;
Index: mm2-2.6.9-rc2/sound/oss/rme96xx.c
===================================================================
--- mm2-2.6.9-rc2.orig/sound/oss/rme96xx.c	2004-09-12 22:32:16.000000000 -0700
+++ mm2-2.6.9-rc2/sound/oss/rme96xx.c	2004-09-23 19:01:00.265680138 -0700
@@ -1685,14 +1685,14 @@
 	if (vma->vm_flags & VM_WRITE) {
 		if (!s->started) rme96xx_startcard(s,1);
 
-		if (remap_page_range(vma, vma->vm_start, virt_to_phys(s->playbuf + dma->outoffset*RME96xx_DMA_MAX_SIZE), size, vma->vm_page_prot)) {
+		if (remap_pfn_range(vma, vma->vm_start, virt_to_phys(s->playbuf + dma->outoffset*RME96xx_DMA_MAX_SIZE) >> PAGE_SHIFT, size, vma->vm_page_prot)) {
 			unlock_kernel();
 			return -EAGAIN;
 		}
 	} 
 	else if (vma->vm_flags & VM_READ) {
 		if (!s->started) rme96xx_startcard(s,1);
-		if (remap_page_range(vma, vma->vm_start, virt_to_phys(s->playbuf + dma->inoffset*RME96xx_DMA_MAX_SIZE), size, vma->vm_page_prot)) {
+		if (remap_pfn_range(vma, vma->vm_start, virt_to_phys(s->playbuf + dma->inoffset*RME96xx_DMA_MAX_SIZE) >> PAGE_SHIFT, size, vma->vm_page_prot)) {
 			unlock_kernel();
 			return -EAGAIN;
 		}
Index: mm2-2.6.9-rc2/sound/oss/i810_audio.c
===================================================================
--- mm2-2.6.9-rc2.orig/sound/oss/i810_audio.c	2004-09-12 22:33:11.000000000 -0700
+++ mm2-2.6.9-rc2/sound/oss/i810_audio.c	2004-09-23 19:04:47.742098466 -0700
@@ -917,7 +917,7 @@
 	dmabuf->rawbuf = rawbuf;
 	dmabuf->buforder = order;
 	
-	/* now mark the pages as reserved; otherwise remap_page_range doesn't do what we want */
+	/* now mark the pages as reserved; otherwise remap_pfn_range doesn't do what we want */
 	pend = virt_to_page(rawbuf + (PAGE_SIZE << order) - 1);
 	for (page = virt_to_page(rawbuf); page <= pend; page++)
 		SetPageReserved(page);
@@ -1750,7 +1750,8 @@
 	if (size > (PAGE_SIZE << dmabuf->buforder))
 		goto out;
 	ret = -EAGAIN;
-	if (remap_page_range(vma, vma->vm_start, virt_to_phys(dmabuf->rawbuf),
+	if (remap_pfn_range(vma, vma->vm_start,
+			     virt_to_phys(dmabuf->rawbuf) >> PAGE_SHIFT,
 			     size, vma->vm_page_prot))
 		goto out;
 	dmabuf->mapped = 1;
Index: mm2-2.6.9-rc2/sound/oss/maestro3.c
===================================================================
--- mm2-2.6.9-rc2.orig/sound/oss/maestro3.c	2004-09-12 22:33:23.000000000 -0700
+++ mm2-2.6.9-rc2/sound/oss/maestro3.c	2004-09-23 19:07:40.346858554 -0700
@@ -1557,7 +1557,9 @@
      * ask Jeff what the hell I'm doing wrong.
      */
     ret = -EAGAIN;
-    if (remap_page_range(vma, vma->vm_start, virt_to_phys(db->rawbuf), size, vma->vm_page_prot))
+    if (remap_pfn_range(vma, vma->vm_start,
+				virt_to_phys(db->rawbuf) >> PAGE_SHIFT,
+				size, vma->vm_page_prot))
         goto out;
 
     db->mapped = 1;
Index: mm2-2.6.9-rc2/sound/oss/ali5455.c
===================================================================
--- mm2-2.6.9-rc2.orig/sound/oss/ali5455.c	2004-09-12 22:33:11.000000000 -0700
+++ mm2-2.6.9-rc2/sound/oss/ali5455.c	2004-09-23 19:06:23.577529266 -0700
@@ -934,7 +934,7 @@
 	dmabuf->rawbuf = rawbuf;
 	dmabuf->buforder = order;
 
-	/* now mark the pages as reserved; otherwise remap_page_range doesn't do what we want */
+	/* now mark the pages as reserved; otherwise remap_pfn_range doesn't do what we want */
 	pend = virt_to_page(rawbuf + (PAGE_SIZE << order) - 1);
 	for (page = virt_to_page(rawbuf); page <= pend; page++)
 		SetPageReserved(page);
@@ -1955,7 +1955,9 @@
 	if (size > (PAGE_SIZE << dmabuf->buforder))
 		goto out;
 	ret = -EAGAIN;
-	if (remap_page_range(vma, vma->vm_start, virt_to_phys(dmabuf->rawbuf), size, vma->vm_page_prot))
+	if (remap_pfn_range(vma, vma->vm_start,
+				virt_to_phys(dmabuf->rawbuf) >> PAGE_SHIFT,
+				size, vma->vm_page_prot))
 		goto out;
 	dmabuf->mapped = 1;
 	dmabuf->trigger = 0;
Index: mm2-2.6.9-rc2/sound/oss/trident.c
===================================================================
--- mm2-2.6.9-rc2.orig/sound/oss/trident.c	2004-09-12 22:33:11.000000000 -0700
+++ mm2-2.6.9-rc2/sound/oss/trident.c	2004-09-23 19:05:42.082837418 -0700
@@ -1281,7 +1281,7 @@
 	dmabuf->buforder = order;
 
 	/* now mark the pages as reserved; otherwise */ 
-	/* remap_page_range doesn't do what we want */
+	/* remap_pfn_range doesn't do what we want */
 	pend = virt_to_page(rawbuf + (PAGE_SIZE << order) - 1);
 	for (page = virt_to_page(rawbuf); page <= pend; page++)
 		SetPageReserved(page);
@@ -2223,7 +2223,8 @@
 	if (size > (PAGE_SIZE << dmabuf->buforder))
 		goto out;
 	ret = -EAGAIN;
-	if (remap_page_range(vma, vma->vm_start, virt_to_phys(dmabuf->rawbuf), 
+	if (remap_pfn_range(vma, vma->vm_start,
+			     virt_to_phys(dmabuf->rawbuf) >> PAGE_SHIFT,
 			     size, vma->vm_page_prot))
 		goto out;
 	dmabuf->mapped = 1;
Index: mm2-2.6.9-rc2/sound/oss/es1370.c
===================================================================
--- mm2-2.6.9-rc2.orig/sound/oss/es1370.c	2004-09-12 22:33:38.000000000 -0700
+++ mm2-2.6.9-rc2/sound/oss/es1370.c	2004-09-23 19:08:35.737437906 -0700
@@ -573,7 +573,7 @@
 		if (!db->rawbuf)
 			return -ENOMEM;
 		db->buforder = order;
-		/* now mark the pages as reserved; otherwise remap_page_range doesn't do what we want */
+		/* now mark the pages as reserved; otherwise remap_pfn_range doesn't do what we want */
 		pend = virt_to_page(db->rawbuf + (PAGE_SIZE << db->buforder) - 1);
 		for (page = virt_to_page(db->rawbuf); page <= pend; page++)
 			SetPageReserved(page);
@@ -1364,7 +1364,9 @@
 		ret = -EINVAL;
 		goto out;
 	}
-	if (remap_page_range(vma, vma->vm_start, virt_to_phys(db->rawbuf), size, vma->vm_page_prot)) {
+	if (remap_pfn_range(vma, vma->vm_start,
+				virt_to_phys(db->rawbuf) >> PAGE_SHIFT,
+				size, vma->vm_page_prot)) {
 		ret = -EAGAIN;
 		goto out;
 	}
@@ -1940,7 +1942,9 @@
 	if (size > (PAGE_SIZE << s->dma_dac1.buforder))
 		goto out;
 	ret = -EAGAIN;
-	if (remap_page_range(vma, vma->vm_start, virt_to_phys(s->dma_dac1.rawbuf), size, vma->vm_page_prot))
+	if (remap_pfn_range(vma, vma->vm_start,
+				virt_to_phys(s->dma_dac1.rawbuf) >> PAGE_SHIFT,
+				size, vma->vm_page_prot))
 		goto out;
 	s->dma_dac1.mapped = 1;
 	ret = 0;
Index: mm2-2.6.9-rc2/sound/oss/maestro.c
===================================================================
--- mm2-2.6.9-rc2.orig/sound/oss/maestro.c	2004-09-12 22:33:23.000000000 -0700
+++ mm2-2.6.9-rc2/sound/oss/maestro.c	2004-09-23 19:07:01.021836866 -0700
@@ -2520,7 +2520,9 @@
 	if (size > (PAGE_SIZE << db->buforder))
 		goto out;
 	ret = -EAGAIN;
-	if (remap_page_range(vma, vma->vm_start, virt_to_phys(db->rawbuf), size, vma->vm_page_prot))
+	if (remap_pfn_range(vma, vma->vm_start,
+				virt_to_phys(db->rawbuf) >> PAGE_SHIFT,
+				size, vma->vm_page_prot))
 		goto out;
 	db->mapped = 1;
 	ret = 0;
@@ -2953,7 +2955,7 @@
 
 	}
 
-	/* now mark the pages as reserved; otherwise remap_page_range doesn't do what we want */
+	/* now mark the pages as reserved; otherwise remap_pfn_range doesn't do what we want */
 	pend = virt_to_page(rawbuf + (PAGE_SIZE << order) - 1);
 	for (page = virt_to_page(rawbuf); page <= pend; page++)
 		SetPageReserved(page);

[vm 4/4] remove remap_page_range()

[William Lee Irwin III]

On Thu, Sep 23, 2004 at 07:23:29PM -0700, William Lee Irwin III wrote:
> Eliminate direct callers of remap_page_range().

Eliminate the last vestiges of remap_page_range() apart from maestro3
changelogs.

Index: mm2-2.6.9-rc2/include/linux/mm.h
===================================================================
--- mm2-2.6.9-rc2.orig/include/linux/mm.h	2004-09-23 16:35:12.546535586 -0700
+++ mm2-2.6.9-rc2/include/linux/mm.h	2004-09-23 19:09:41.615422930 -0700
@@ -767,14 +767,6 @@
 int remap_pfn_range(struct vm_area_struct *vma, unsigned long uvaddr,
 		unsigned long pfn, unsigned long size, pgprot_t prot);
 
-static inline int remap_page_range(struct vm_area_struct *vma,
-					unsigned long uvaddr,
-					unsigned long paddr,
-					unsigned long size, pgprot_t prot)
-{
-	return remap_pfn_range(vma, uvaddr, paddr >> PAGE_SHIFT, size, prot);
-}
-
 #ifdef CONFIG_PROC_FS
 void __vm_stat_account(struct mm_struct *, unsigned long, struct file *, long);
 #else

Re: [vm 3/4] convert direct callers of remap_page_range()

[William Lee Irwin III]

On Thu, Sep 23, 2004 at 07:21:23PM -0700, William Lee Irwin III wrote:
>> Eliminate callers of remap_page_range() via io_remap_page_range().

On Thu, Sep 23, 2004 at 07:23:29PM -0700, William Lee Irwin III wrote:
> Eliminate direct callers of remap_page_range().

Notable here is the following:

$ diffstat patches/caller-drivers.patch|& tail -1
 58 files changed, 147 insertions(+), 233 deletions(-)

-- wli

Re: [vm 0/4] replace remap_page_range() with remap_pfn_range()

[William Lee Irwin III]

On Thu, Sep 23, 2004 at 06:22:22PM -0500, John Fusco wrote:
>> Everything worked great until we decided that we needed to install 6GB 
>> in this system.  The problem is that remap_page_range() uses an unsigned 
>> long as the parameter for a physical address.  On IA32, an unsigned long 
>> is 32-bits, but the IA32 is capable of addressing well over 4GB of RAM.  
>> So physical addresses on IA32 must be larger than 32 bits.

On Thu, Sep 23, 2004 at 07:17:35PM -0700, William Lee Irwin III wrote:
> Do these patches work for you? Compiletested on sparc64.

Long-format changelog:

Resolve physical address overflow issue in the remap_page_range() API
by replacing it with remap_pfn_range(), which accepts its physical
address argument as a pfn, hence allowing the use of a single-precision
physical address argument without the risk of overflow at the API
boundary. The above issue has hobbled support for various 32-bit
architectures, including some embedded systems (ppc440 IIRC), caused
persistent portability issues for sound drivers for legacy systems
(sparc32; unfortunately this patch alone does not fully resolve those),
and according to John Fusco's reports, made drivers for some PCI-X
hardware infeasible to port to recent ia32 PAE enterprise systems. With
this patch series applied, physical address overflows on 32-bit systems
caused directly by remap_page_range() are gone forever, and ca. 100LOC
of cut-and-waste driver code are swept out of existence alongside them.


-- wli

P.S.: The existing solution to the sparc32 issue was to pass a double
	precision representation of the physical address as 2 single-
	precision arguments in an API (io_remap_page_range()) whose
	argument corresponding to those two was a single single-
	precision argument on most/all other architectures. The
	sparc32-specific issue requires more work beyond these patches
	to rectify. The most apparent consequence of the API skew is
	that drivers don't compile on sparc32 when they use
	io_remap_page_range() due to passing insufficient arguments,
	or vice-versa for drivers originally written for sparc32.

Is there a node-affinity memory allocation benchmark?

[Annie]

Hi all,
     If I want to test node-affinity memory allocation on NUMA
machine, has there already been any benchmark I can use?

Best Regards,
Annie
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