Re: [PATCH] (urgent) ppc32: Fix CPUs with soft loaded TLB

[Benjamin Herrenschmidt <benh@kernel.crashing.org>]

On Sun, 2004-06-06 at 16:20, Linus Torvalds wrote:
> On Sun, 6 Jun 2004, Benjamin Herrenschmidt wrote:
> > 
> > The recent introduction of ptep_set_access_flags() with the optimisation
> > of not flushing the TLB unfortunately broke ppc32 CPUs with no hash table.
> 
> Makes sense, applied.

ARGH. Missed one file. Here is an additional patch (missed tlbflush.h patch)

Sorry.

This adds the definiction of flush_tlb_page_nohash() that was missing
from the previous patch fixing SW-TLB loaded PPCs

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
 
===== include/asm-ppc/tlbflush.h 1.9 vs edited =====
--- 1.9/include/asm-ppc/tlbflush.h	2003-09-15 15:59:05 -05:00
+++ edited/include/asm-ppc/tlbflush.h	2004-06-06 16:01:50 -05:00
@@ -29,6 +29,9 @@
 static inline void flush_tlb_page(struct vm_area_struct *vma,
 				unsigned long vmaddr)
 	{ _tlbie(vmaddr); }
+static inline void flush_tlb_page_nohash(struct vm_area_struct *vma,
+					 unsigned long vmaddr)
+	{ _tlbie(vmaddr); }
 static inline void flush_tlb_range(struct vm_area_struct *vma,
 				unsigned long start, unsigned long end)
 	{ __tlbia(); }
@@ -44,6 +47,9 @@
 static inline void flush_tlb_page(struct vm_area_struct *vma,
 				unsigned long vmaddr)
 	{ _tlbie(vmaddr); }
+static inline void flush_tlb_page_nohash(struct vm_area_struct *vma,
+					 unsigned long vmaddr)
+	{ _tlbie(vmaddr); }
 static inline void flush_tlb_range(struct mm_struct *mm,
 				unsigned long start, unsigned long end)
 	{ __tlbia(); }
@@ -56,6 +62,7 @@
 struct vm_area_struct;
 extern void flush_tlb_mm(struct mm_struct *mm);
 extern void flush_tlb_page(struct vm_area_struct *vma, unsigned long vmaddr);
+extern void flush_tlb_page_nohash(struct vm_area_struct *vma, unsigned long addr);
 extern void flush_tlb_range(struct vm_area_struct *vma, unsigned long start,
 			    unsigned long end);
 extern void flush_tlb_kernel_range(unsigned long start, unsigned long end);