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| author |   Ingo Molnar <mingo@elte.hu> | 2009-05-11 09:33:06 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-05-11 09:33:15 +0200 |
| commit | 134cbf35c739bf89c51fd975a33a6b87507482c4 (patch) | |
| tree | c30536dcbb6e99a0f204879bbe5a19bfb27cccf8 /arch/x86/mm/init.c | |
| parent | x86: fix typo in address space documentation (diff) | |
| parent | Linux 2.6.30-rc5 (diff) | |
| download | linux-dev-134cbf35c739bf89c51fd975a33a6b87507482c4.tar.xz linux-dev-134cbf35c739bf89c51fd975a33a6b87507482c4.zip | |
Merge commit 'v2.6.30-rc5' into x86/mm
Merge reason: this branch was on a .30-rc2 base - sync it up with
all the latest fixes.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86/mm/init.c')
| -rw-r--r-- | arch/x86/mm/init.c | 18 |
1 files changed, 17 insertions, 1 deletions
diff --git a/arch/x86/mm/init.c b/arch/x86/mm/init.c index 4d67c33a2e16..95f5ecf2be50 100644 --- a/arch/x86/mm/init.c +++ b/arch/x86/mm/init.c @@ -7,6 +7,7 @@ #include <asm/page.h> #include <asm/page_types.h> #include <asm/sections.h> +#include <asm/setup.h> #include <asm/system.h> #include <asm/tlbflush.h> #include <asm/tlb.h> @@ -366,8 +367,23 @@ unsigned long __init_refok init_memory_mapping(unsigned long start, #endif #ifdef CONFIG_X86_64 - if (!after_bootmem) + if (!after_bootmem && !start) { + pud_t *pud; + pmd_t *pmd; + mmu_cr4_features = read_cr4(); + + /* + * _brk_end cannot change anymore, but it and _end may be + * located on different 2M pages. cleanup_highmap(), however, + * can only consider _end when it runs, so destroy any + * mappings beyond _brk_end here. + */ + pud = pud_offset(pgd_offset_k(_brk_end), _brk_end); + pmd = pmd_offset(pud, _brk_end - 1); + while (++pmd <= pmd_offset(pud, (unsigned long)_end - 1)) + pmd_clear(pmd); + } #endif __flush_tlb_all(); |