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| author | Andi Kleen <andi@firstfloor.org> | 2008-03-12 03:53:27 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-04-17 17:41:30 +0200 |
| commit | 7d1116a92d709c22e7db910724c9fcd2001b0499 (patch) | |
| tree | 364fe750182fd5b8e53f14c64aed490388f6c5e6 /include/asm-x86/page.h | |
| parent | 41bd4eac748f39d7f3ed770fae3e595a747172bd (diff) | |
| download | linux-stable-7d1116a92d709c22e7db910724c9fcd2001b0499.tar.gz linux-stable-7d1116a92d709c22e7db910724c9fcd2001b0499.tar.bz2 linux-stable-7d1116a92d709c22e7db910724c9fcd2001b0499.zip | |
x86: implement true end_pfn_mapped for 32bit
Even on 32bit 2MB pages can map more memory than is in the true
max_low_pfn if end_pfn is not highmem and not aligned to 2MB.
Add a end_pfn_map similar to x86-64 that accounts for this
fact. This is important for code that really needs to know about
all mapping aliases.
Signed-off-by: Andi Kleen <ak@suse.de>
Cc: andreas.herrmann3@amd.com
Cc: mingo@elte.hu
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'include/asm-x86/page.h')
| -rw-r--r-- | include/asm-x86/page.h | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/include/asm-x86/page.h b/include/asm-x86/page.h index a05b2896492f..b734939916c4 100644 --- a/include/asm-x86/page.h +++ b/include/asm-x86/page.h @@ -36,7 +36,7 @@ #define max_pfn_mapped end_pfn_map #else #include <asm/page_32.h> -#define max_pfn_mapped max_low_pfn +#define max_pfn_mapped end_pfn_map #endif /* CONFIG_X86_64 */ #define PAGE_OFFSET ((unsigned long)__PAGE_OFFSET) @@ -50,6 +50,8 @@ extern int page_is_ram(unsigned long pagenr); +extern unsigned long end_pfn_map; + struct page; static inline void clear_user_page(void *page, unsigned long vaddr, |