diff options
| author |   Mel Gorman <mgorman@suse.de> | 2015-03-07 15:20:48 +0000 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@linux-foundation.org> | 2015-03-12 14:07:41 -0700 |
| commit | ba68bc0115ebfc37f911db4e87bf5f7991f89698 (patch) | |
| tree | 4d4806b791a737f9b54ff691f7092f683831d70e | |
| parent | Merge branch 'i2c/for-current' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux (diff) | |
| download | linux-dev-ba68bc0115ebfc37f911db4e87bf5f7991f89698.tar.xz linux-dev-ba68bc0115ebfc37f911db4e87bf5f7991f89698.zip | |
mm: thp: Return the correct value for change_huge_pmd
The wrong value is being returned by change_huge_pmd since commit
10c1045f28e8 ("mm: numa: avoid unnecessary TLB flushes when setting
NUMA hinting entries") which allows a fallthrough that tries to adjust
non-existent PTEs. This patch corrects it.
Signed-off-by: Mel Gorman <mgorman@suse.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | mm/huge_memory.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/mm/huge_memory.c b/mm/huge_memory.c index 89b9075f8c11..626e93db28ba 100644 --- a/mm/huge_memory.c +++ b/mm/huge_memory.c @@ -1487,6 +1487,7 @@ int change_huge_pmd(struct vm_area_struct *vma, pmd_t *pmd, if (__pmd_trans_huge_lock(pmd, vma, &ptl) == 1) { pmd_t entry; + ret = 1; /* * Avoid trapping faults against the zero page. The read-only @@ -1495,11 +1496,10 @@ int change_huge_pmd(struct vm_area_struct *vma, pmd_t *pmd, */ if (prot_numa && is_huge_zero_pmd(*pmd)) { spin_unlock(ptl); - return 0; + return ret; } if (!prot_numa || !pmd_protnone(*pmd)) { - ret = 1; entry = pmdp_get_and_clear_notify(mm, addr, pmd); entry = pmd_modify(entry, newprot); ret = HPAGE_PMD_NR; |