f2fs, lockdep: annotate mutex_lock_all()

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Majianpeng reported a lockdep splat for f2fs. It turns out mutex_lock_all()
acquires an array of locks (in global/local lock style).

Any such operation is always serialized using cp_mutex, therefore there is no
fs_lock[] lock-order issue; tell lockdep about this using the
mutex_lock_nest_lock() primitive.

Reported-by: majianpeng <majianpeng@gmail.com>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>

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Peter Zijlstra 2013-05-16 20:03:12 +02:00 • committed by Jaegeuk Kim

parent f356fe0cba

commit bfe35965ec

1 changed files with 11 additions and 3 deletions

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fs/f2fs/f2fs.h

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