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authorAndrea Arcangeli <aarcange@redhat.com>2015-09-04 15:47:23 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2015-09-04 16:54:41 -0700
commit2c5b7e1be74ff0175dedbbd325abe9f0dbbb09ae (patch)
treee93f6aa423faeb6fbcd46103694d629b0a7bb82c /tools
parent230c92a8797e0e717c6732de0fffdd5726c0f48f (diff)
userfaultfd: avoid missing wakeups during refile in userfaultfd_read
During the refile in userfaultfd_read both waitqueues could look empty to the lockless wake_userfault(). Use a seqcount to prevent this false negative that could leave an userfault blocked. Signed-off-by: Andrea Arcangeli <aarcange@redhat.com> Cc: Pavel Emelyanov <xemul@parallels.com> Cc: Dave Hansen <dave.hansen@intel.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'tools')
0 files changed, 0 insertions, 0 deletions

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