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thp: don't allow transparent hugepage support without PSE

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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>
This commit is contained in:
Andrea Arcangeli
2011-01-13 15:47:09 -08:00
committed by Linus Torvalds
parent 94fcc585fb
commit 4b7167b9ff
2 changed files with 13 additions and 0 deletions
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8
mm/huge_memory.c
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@ -487,7 +487,15 @@ static int __init hugepage_init(void)
int err;
#ifdef CONFIG_SYSFS
static struct kobject *hugepage_kobj;
#endif
err = -EINVAL;
if (!has_transparent_hugepage()) {
transparent_hugepage_flags = 0;
goto out;
}
#ifdef CONFIG_SYSFS
err = -ENOMEM;
hugepage_kobj = kobject_create_and_add("transparent_hugepage", mm_kobj);
if (unlikely(!hugepage_kobj)) {