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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+ analogdevicesinc#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: 1cf7a15 ("afs: Implement shared-writeable mmap") Signed-off-by: Matthew Wilcox (Oracle) <[email protected]> Signed-off-by: David Howells <[email protected]> cc: [email protected] Link: https://lore.kernel.org/r/[email protected]/ Signed-off-by: Linus Torvalds <[email protected]>
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