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authorDavid S. Miller <davem@davemloft.net>2014-04-25 21:21:12 +0400
committerDavid S. Miller <davem@davemloft.net>2014-05-04 09:32:37 +0400
commit04df419de34104d8818b8c5cffaa062fa36d20ea (patch)
tree35f20c565e3d6797ed9638e688e4e911251da011 /arch/sparc/include/asm/pgtable_64.h
parent51e5ef1bb7ab0e5fa7de4e802da5ab22fe35f0bf (diff)
downloadlinux-04df419de34104d8818b8c5cffaa062fa36d20ea.tar.xz
sparc64: Fix bugs in get_user_pages_fast() wrt. THP.
The large PMD path needs to check _PAGE_VALID not _PAGE_PRESENT, to decide if it needs to bail and return 0. pmd_large() should therefore just check _PAGE_PMD_HUGE. Calls to gup_huge_pmd() are guarded with a check of pmd_large(), so we just need to add a valid bit check. Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch/sparc/include/asm/pgtable_64.h')
-rw-r--r--arch/sparc/include/asm/pgtable_64.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/sparc/include/asm/pgtable_64.h b/arch/sparc/include/asm/pgtable_64.h
index e3db4b8e689b..1f281030769c 100644
--- a/arch/sparc/include/asm/pgtable_64.h
+++ b/arch/sparc/include/asm/pgtable_64.h
@@ -633,7 +633,7 @@ static inline unsigned long pmd_large(pmd_t pmd)
{
pte_t pte = __pte(pmd_val(pmd));
- return (pte_val(pte) & _PAGE_PMD_HUGE) && pte_present(pte);
+ return pte_val(pte) & _PAGE_PMD_HUGE;
}
#ifdef CONFIG_TRANSPARENT_HUGEPAGE