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authorMatthew Wilcox (Oracle) <willy@infradead.org>2021-06-16 23:22:28 +0200
committerLinus Torvalds <torvalds@linux-foundation.org>2021-06-18 22:49:07 +0200
commit9620ad86d0e3e8fda4a23efc22e0b2ae4ded1105 (patch)
tree3d79aa05ed9f88b8d5e52cd49de692233fae030b /fs/block_dev.c
parentMerge tag 'arc-5.13-rc7-fixes' of git://git.kernel.org/pub/scm/linux/kernel/g... (diff)
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afs: Re-enable freezing once a page fault is interrupted
If a task is killed during a page fault, it does not currently call sb_end_pagefault(), which means that the filesystem cannot be frozen at any time thereafter. This may be reported by lockdep like this: ==================================== WARNING: fsstress/10757 still has locks held! 5.13.0-rc4-build4+ #91 Not tainted ------------------------------------ 1 lock held by fsstress/10757: #0: ffff888104eac530 ( sb_pagefaults as filesystem freezing is modelled as a lock. Fix this by removing all the direct returns from within the function, and using 'ret' to indicate whether we were interrupted or successful. Fixes: 1cf7a1518aef ("afs: Implement shared-writeable mmap") Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org> Signed-off-by: David Howells <dhowells@redhat.com> cc: linux-afs@lists.infradead.org Link: https://lore.kernel.org/r/20210616154900.1958373-1-willy@infradead.org/ Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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