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author | John Stultz <john.stultz@linaro.org> | 2011-04-18 13:19:07 -0700 |
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committer | John Stultz <john.stultz@linaro.org> | 2011-04-18 13:19:07 -0700 |
commit | 775d71e49c65f1f6aa57776ea1da62988fc9a30a (patch) | |
tree | ce03cae544bacc8dda67422fd66a543dd1ae3c99 /arch/x86/mm/init.c | |
parent | 18e82d2b952ab57fc1c8a69d4fa14e562f2aecf6 (diff) | |
parent | c1a952f48517b5545075d8eb1a5d543099bd2ae1 (diff) |
Merge branch 'upstream/linaro.38' into linaro-android.38KNOWN_GOOD
Diffstat (limited to 'arch/x86/mm/init.c')
-rw-r--r-- | arch/x86/mm/init.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/arch/x86/mm/init.c b/arch/x86/mm/init.c index f13ff3a2267..947f42abe82 100644 --- a/arch/x86/mm/init.c +++ b/arch/x86/mm/init.c @@ -279,6 +279,25 @@ unsigned long __init_refok init_memory_mapping(unsigned long start, load_cr3(swapper_pg_dir); #endif +#ifdef CONFIG_X86_64 + 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(); if (!after_bootmem && e820_table_end > e820_table_start) |