[PATCH 12 of 36] x86_64: replace end_pfn with num_physpages

Jeremy Fitzhardinge
2008-06-25T04:39:13Z

Reasons for replacement:
- they're semantically identical
- end_pfn is a bad name for a global identifier
- small step towards unification

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Vivek Goyal <vgoyal@in.ibm.com>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
---
arch/x86/kernel/aperture_64.c | 4 ++--
arch/x86/kernel/e820.c | 2 +-
arch/x86/kernel/early-quirks.c | 2 +-
arch/x86/kernel/machine_kexec_64.c | 2 +-
arch/x86/kernel/pci-calgary_64.c | 4 ++--
arch/x86/kernel/pci-dma.c | 4 ++--
arch/x86/kernel/pci-gart_64.c | 4 ++--
arch/x86/kernel/pci-swiotlb_64.c | 2 +-
arch/x86/kernel/setup_64.c | 22 ++++++++++------------
arch/x86/mm/init_64.c | 14 +++++++-------
arch/x86/mm/k8topology_64.c | 4 ++--
arch/x86/mm/numa_64.c | 4 ++--
arch/x86/mm/srat_64.c | 2 +-
arch/x86/power/hibernate_64.c | 2 +-
include/asm-x86/page_64.h | 3 +--
15 files changed, 36 insertions(+), 39 deletions(-)

diff --git a/arch/x86/kernel/aperture_64.c b/arch/x86/kernel/aperture_64.c
--- a/arch/x86/kernel/aperture_64.c
+++ b/arch/x86/kernel/aperture_64.c
@@ -407,7 +407,7 @@
agp_aper_base == aper_base &&
agp_aper_order == aper_order) {
/* the same between two setting from NB and agp */
- if (!no_iommu && end_pfn > MAX_DMA32_PFN && !printed_gart_size_msg) {
+ if (!no_iommu && num_physpages > MAX_DMA32_PFN && !printed_gart_size_msg) {
printk(KERN_ERR "you are using iommu with agp, but GART size is less than 64M\n");
printk(KERN_ERR "please increase GART size in your BIOS setup\n");
printk(KERN_ERR "if BIOS doesn't have that option, contact your HW vendor!\n");
@@ -448,7 +448,7 @@
/* Got the aperture from the AGP bridge */
} else if (swiotlb && !valid_agp) {
/* Do nothing */
- } else if ((!no_iommu && end_pfn > MAX_DMA32_PFN) ||
+ } else if ((!no_iommu && num_physpages > MAX_DMA32_PFN) ||
force_iommu ||
valid_agp ||
fallback_aper_force) {
diff --git a/arch/x86/kernel/e820.c b/arch/x86/kernel/e820.c
--- a/arch/x86/kernel/e820.c
+++ b/arch/x86/kernel/e820.c
@@ -516,7 +516,7 @@

#ifdef CONFIG_X86_64
if (!found) {
- gapstart = (end_pfn << PAGE_SHIFT) + 1024*1024;
+ gapstart = (num_physpages << PAGE_SHIFT) + 1024*1024;
printk(KERN_ERR "PCI: Warning: Cannot find a gap in the 32bit "
"address range\n"
KERN_ERR "PCI: Unassigned devices with 32bit resource "
diff --git a/arch/x86/kernel/early-quirks.c b/arch/x86/kernel/early-quirks.c
--- a/arch/x86/kernel/early-quirks.c
+++ b/arch/x86/kernel/early-quirks.c
@@ -50,7 +50,7 @@
static void __init via_bugs(int num, int slot, int func)
{
#ifdef CONFIG_GART_IOMMU
- if ((end_pfn > MAX_DMA32_PFN || force_iommu) &&
+ if ((num_physpages > MAX_DMA32_PFN || force_iommu) &&
!gart_iommu_aperture_allowed) {
printk(KERN_INFO
"Looks like a VIA chipset. Disabling IOMMU."
diff --git a/arch/x86/kernel/machine_kexec_64.c b/arch/x86/kernel/machine_kexec_64.c
--- a/arch/x86/kernel/machine_kexec_64.c
+++ b/arch/x86/kernel/machine_kexec_64.c
@@ -112,7 +112,7 @@
{
pgd_t *level4p;
level4p = (pgd_t *)__va(start_pgtable);
- return init_level4_page(image, level4p, 0, end_pfn << PAGE_SHIFT);
+ return init_level4_page(image, level4p, 0, num_physpages << PAGE_SHIFT);
}

static void set_idt(void *newidt, u16 limit)
diff --git a/arch/x86/kernel/pci-calgary_64.c b/arch/x86/kernel/pci-calgary_64.c
--- a/arch/x86/kernel/pci-calgary_64.c
+++ b/arch/x86/kernel/pci-calgary_64.c
@@ -1394,7 +1394,7 @@
return;
}

- specified_table_size = determine_tce_table_size(end_pfn * PAGE_SIZE);
+ specified_table_size = determine_tce_table_size(num_physpages * PAGE_SIZE);

for (bus = 0; bus < MAX_PHB_BUS_NUM; bus++) {
struct calgary_bus_info *info = &bus_info[bus];
@@ -1459,7 +1459,7 @@
if (ret) {
printk(KERN_ERR "PCI-DMA: Calgary init failed %d, "
"falling back to no_iommu\n", ret);
- if (end_pfn > MAX_DMA32_PFN)
+ if (num_physpages > MAX_DMA32_PFN)
printk(KERN_ERR "WARNING more than 4GB of memory, "
"32bit PCI may malfunction.\n");
return ret;
diff --git a/arch/x86/kernel/pci-dma.c b/arch/x86/kernel/pci-dma.c
--- a/arch/x86/kernel/pci-dma.c
+++ b/arch/x86/kernel/pci-dma.c
@@ -74,7 +74,7 @@
void __init dma32_reserve_bootmem(void)
{
unsigned long size, align;
- if (end_pfn <= MAX_DMA32_PFN)
+ if (num_physpages <= MAX_DMA32_PFN)
return;

/*
@@ -93,7 +93,7 @@
static void __init dma32_free_bootmem(void)
{

- if (end_pfn <= MAX_DMA32_PFN)
+ if (num_physpages <= MAX_DMA32_PFN)
return;

if (!dma32_bootmem_ptr)
diff --git a/arch/x86/kernel/pci-gart_64.c b/arch/x86/kernel/pci-gart_64.c
--- a/arch/x86/kernel/pci-gart_64.c
+++ b/arch/x86/kernel/pci-gart_64.c
@@ -752,10 +752,10 @@
return;

if (no_iommu ||
- (!force_iommu && end_pfn <= MAX_DMA32_PFN) ||
+ (!force_iommu && num_physpages <= MAX_DMA32_PFN) ||
!gart_iommu_aperture ||
(no_agp && init_k8_gatt(&info) < 0)) {
- if (end_pfn > MAX_DMA32_PFN) {
+ if (num_physpages > MAX_DMA32_PFN) {
printk(KERN_WARNING "More than 4GB of memory "
"but GART IOMMU not available.\n"
KERN_WARNING "falling back to iommu=soft.\n");
diff --git a/arch/x86/kernel/pci-swiotlb_64.c b/arch/x86/kernel/pci-swiotlb_64.c
--- a/arch/x86/kernel/pci-swiotlb_64.c
+++ b/arch/x86/kernel/pci-swiotlb_64.c
@@ -38,7 +38,7 @@
void __init pci_swiotlb_init(void)
{
/* don't initialize swiotlb if iommu=off (no_iommu=1) */
- if (!iommu_detected && !no_iommu && end_pfn > MAX_DMA32_PFN)
+ if (!iommu_detected && !no_iommu && num_physpages > MAX_DMA32_PFN)
swiotlb = 1;
if (swiotlb_force)
swiotlb = 1;
diff --git a/arch/x86/kernel/setup_64.c b/arch/x86/kernel/setup_64.c
--- a/arch/x86/kernel/setup_64.c
+++ b/arch/x86/kernel/setup_64.c
@@ -161,7 +161,7 @@
unsigned long ramdisk_image = boot_params.hdr.ramdisk_image;
unsigned long ramdisk_size = boot_params.hdr.ramdisk_size;
unsigned long ramdisk_end = ramdisk_image + ramdisk_size;
- unsigned long end_of_mem = end_pfn << PAGE_SHIFT;
+ unsigned long end_of_mem = num_physpages << PAGE_SHIFT;

if (ramdisk_end <= end_of_mem) {
/*
@@ -267,25 +267,23 @@
* partially used pages are not usable - thus
* we are rounding upwards:
*/
- end_pfn = e820_end_of_ram();
+ num_physpages = e820_end_of_ram();

/* pre allocte 4k for mptable mpc */
early_reserve_e820_mpc_new();
/* update e820 for memory not covered by WB MTRRs */
mtrr_bp_init();
- if (mtrr_trim_uncached_memory(end_pfn)) {
+ if (mtrr_trim_uncached_memory(num_physpages)) {
remove_all_active_ranges();
e820_register_active_regions(0, 0, -1UL);
- end_pfn = e820_end_of_ram();
+ num_physpages = e820_end_of_ram();
}

reserve_initrd();

- num_physpages = end_pfn;
-
check_efer();

- max_pfn_mapped = init_memory_mapping(0, (end_pfn << PAGE_SHIFT));
+ max_pfn_mapped = init_memory_mapping(0, (num_physpages << PAGE_SHIFT));

vsmp_init();

@@ -300,9 +298,9 @@
acpi_boot_table_init();

/* How many end-of-memory variables you have, grandma! */
- max_low_pfn = end_pfn;
- max_pfn = end_pfn;
- high_memory = (void *)__va(end_pfn * PAGE_SIZE - 1) + 1;
+ max_low_pfn = num_physpages;
+ max_pfn = num_physpages;
+ high_memory = (void *)__va(num_physpages * PAGE_SIZE - 1) + 1;

/* Remove active ranges so rediscovery with NUMA-awareness happens */
remove_all_active_ranges();
@@ -314,7 +312,7 @@
acpi_numa_init();
#endif

- initmem_init(0, end_pfn);
+ initmem_init(0, num_physpages);

dma32_reserve_bootmem();

@@ -366,7 +364,7 @@
* We trust e820 completely. No explicit ROM probing in memory.
*/
e820_reserve_resources();
- e820_mark_nosave_regions(end_pfn);
+ e820_mark_nosave_regions(num_physpages);

reserve_standard_io_resources();

diff --git a/arch/x86/mm/init_64.c b/arch/x86/mm/init_64.c
--- a/arch/x86/mm/init_64.c
+++ b/arch/x86/mm/init_64.c
@@ -240,7 +240,7 @@
return adr;
}

- if (pfn >= end_pfn)
+ if (pfn >= num_physpages)
panic("alloc_low_page: ran out of memory");

adr = early_ioremap(pfn * PAGE_SIZE, PAGE_SIZE);
@@ -584,9 +584,9 @@
memset(max_zone_pfns, 0, sizeof(max_zone_pfns));
max_zone_pfns[ZONE_DMA] = MAX_DMA_PFN;
max_zone_pfns[ZONE_DMA32] = MAX_DMA32_PFN;
- max_zone_pfns[ZONE_NORMAL] = end_pfn;
+ max_zone_pfns[ZONE_NORMAL] = num_physpages;

- memory_present(0, 0, end_pfn);
+ memory_present(0, 0, num_physpages);
sparse_init();
free_area_init_nodes(max_zone_pfns);
}
@@ -668,8 +668,8 @@
#else
totalram_pages = free_all_bootmem();
#endif
- reservedpages = end_pfn - totalram_pages -
- absent_pages_in_range(0, end_pfn);
+ reservedpages = num_physpages - totalram_pages -
+ absent_pages_in_range(0, num_physpages);
after_bootmem = 1;

codesize = (unsigned long) &_etext - (unsigned long) &_text;
@@ -688,7 +688,7 @@
printk(KERN_INFO "Memory: %luk/%luk available (%ldk kernel code, "
"%ldk reserved, %ldk data, %ldk init)\n",
(unsigned long) nr_free_pages() << (PAGE_SHIFT-10),
- end_pfn << (PAGE_SHIFT-10),
+ num_physpages << (PAGE_SHIFT-10),
codesize >> 10,
reservedpages << (PAGE_SHIFT-10),
datasize >> 10,
@@ -788,7 +788,7 @@
#endif
unsigned long pfn = phys >> PAGE_SHIFT;

- if (pfn >= end_pfn) {
+ if (pfn >= num_physpages) {
/*
* This can happen with kdump kernels when accessing
* firmware tables:
diff --git a/arch/x86/mm/k8topology_64.c b/arch/x86/mm/k8topology_64.c
--- a/arch/x86/mm/k8topology_64.c
+++ b/arch/x86/mm/k8topology_64.c
@@ -143,8 +143,8 @@
limit |= (1<<24)-1;
limit++;

- if (limit > end_pfn << PAGE_SHIFT)
- limit = end_pfn << PAGE_SHIFT;
+ if (limit > num_physpages << PAGE_SHIFT)
+ limit = num_physpages << PAGE_SHIFT;
if (limit <= base)
continue;

diff --git a/arch/x86/mm/numa_64.c b/arch/x86/mm/numa_64.c
--- a/arch/x86/mm/numa_64.c
+++ b/arch/x86/mm/numa_64.c
@@ -86,7 +86,7 @@

addr = 0x8000;
nodemap_size = round_up(sizeof(s16) * memnodemapsize, L1_CACHE_BYTES);
- nodemap_addr = find_e820_area(addr, end_pfn<<PAGE_SHIFT,
+ nodemap_addr = find_e820_area(addr, num_physpages<<PAGE_SHIFT,
nodemap_size, L1_CACHE_BYTES);
if (nodemap_addr == -1UL) {
printk(KERN_ERR
@@ -579,7 +579,7 @@
memset(max_zone_pfns, 0, sizeof(max_zone_pfns));
max_zone_pfns[ZONE_DMA] = MAX_DMA_PFN;
max_zone_pfns[ZONE_DMA32] = MAX_DMA32_PFN;
- max_zone_pfns[ZONE_NORMAL] = end_pfn;
+ max_zone_pfns[ZONE_NORMAL] = num_physpages;

sparse_memory_present_with_active_regions(MAX_NUMNODES);
sparse_init();
diff --git a/arch/x86/mm/srat_64.c b/arch/x86/mm/srat_64.c
--- a/arch/x86/mm/srat_64.c
+++ b/arch/x86/mm/srat_64.c
@@ -299,7 +299,7 @@
pxmram = 0;
}

- e820ram = end_pfn - absent_pages_in_range(0, end_pfn);
+ e820ram = num_physpages - absent_pages_in_range(0, num_physpages);
/* We seem to lose 3 pages somewhere. Allow a bit of slack. */
if ((long)(e820ram - pxmram) >= 1*1024*1024) {
printk(KERN_ERR
diff --git a/arch/x86/power/hibernate_64.c b/arch/x86/power/hibernate_64.c
--- a/arch/x86/power/hibernate_64.c
+++ b/arch/x86/power/hibernate_64.c
@@ -83,7 +83,7 @@

/* Set up the direct mapping from scratch */
start = (unsigned long)pfn_to_kaddr(0);
- end = (unsigned long)pfn_to_kaddr(end_pfn);
+ end = (unsigned long)pfn_to_kaddr(num_physpages);

for (; start < end; start = next) {
pud_t *pud = (pud_t *)get_safe_page(GFP_ATOMIC);
diff --git a/include/asm-x86/page_64.h b/include/asm-x86/page_64.h
--- a/include/asm-x86/page_64.h
+++ b/include/asm-x86/page_64.h
@@ -58,7 +58,6 @@
void clear_page(void *page);
void copy_page(void *to, void *from);

-extern unsigned long end_pfn;
extern unsigned long phys_base;

extern unsigned long __phys_addr(unsigned long);
@@ -87,7 +86,7 @@
#endif /* !__ASSEMBLY__ */

#ifdef CONFIG_FLATMEM
-#define pfn_valid(pfn) ((pfn) < end_pfn)
+#define pfn_valid(pfn) ((pfn) < num_physpages)
#endif