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authorAndrea Arcangeli <aarcange@redhat.com>2011-01-13 15:47:09 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2011-01-13 17:32:45 -0800
commit4b7167b9ff9b7f3f528cbc4c7d02ebd275b9b10c (patch)
treead2c23c28b9dea009daf3719aefeb79103e2c152 /arch/x86/include/asm/pgtable.h
parent94fcc585fb85ad7b059c70872489b50044d401f3 (diff)
thp: don't allow transparent hugepage support without PSE
Archs implementing Transparent Hugepage Support must implement a function called has_transparent_hugepage to be sure the virtual or physical CPU supports Transparent Hugepages. Signed-off-by: Andrea Arcangeli <aarcange@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/x86/include/asm/pgtable.h')
-rw-r--r--arch/x86/include/asm/pgtable.h5
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/x86/include/asm/pgtable.h b/arch/x86/include/asm/pgtable.h
index c48ba055f693..18601c86fab1 100644
--- a/arch/x86/include/asm/pgtable.h
+++ b/arch/x86/include/asm/pgtable.h
@@ -160,6 +160,11 @@ static inline int pmd_trans_huge(pmd_t pmd)
{
return pmd_val(pmd) & _PAGE_PSE;
}
+
+static inline int has_transparent_hugepage(void)
+{
+ return cpu_has_pse;
+}
#endif /* CONFIG_TRANSPARENT_HUGEPAGE */
static inline pte_t pte_set_flags(pte_t pte, pteval_t set)