path: root/fs
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authorHugh Dickins <hughd@google.com>2013-10-16 13:47:09 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2013-10-16 21:35:53 -0700
commit57a8f0cdb87da776bf0e4ce7554a9133854fa779 (patch)
treefe920bc16fe4ef97e94d31fce5f25bbecaff6e57 /fs
parent750e8165f5e87b6a142be953640eabb13a9d350a (diff)
mm: revert mremap pud_free anti-fix
Revert commit 1ecfd533f4c5 ("mm/mremap.c: call pud_free() after fail calling pmd_alloc()"). The original code was correct: pud_alloc(), pmd_alloc(), pte_alloc_map() ensure that the pud, pmd, pt is already allocated, and seldom do they need to allocate; on failure, upper levels are freed if appropriate by the subsequent do_munmap(). Whereas commit 1ecfd533f4c5 did an unconditional pud_free() of a most-likely still-in-use pud: saved only by the near-impossiblity of pmd_alloc() failing. Signed-off-by: Hugh Dickins <hughd@google.com> Cc: Chen Gang <gang.chen@asianux.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs')
0 files changed, 0 insertions, 0 deletions