2842bb20ee
In do_get_write_access() we wait on BH_Unshadow bit for buffer to get from shadow state. The waking code in journal_commit_transaction() has a bug because it does not issue a memory barrier after the buffer is moved from the shadow state and before wake_up_bit() is called. Thus a waitqueue check can happen before the buffer is actually moved from the shadow state and waiting process may never be woken. Fix the problem by issuing proper barrier. CC: stable@kernel.org Reported-by: Tao Ma <boyu.mt@taobao.com> Signed-off-by: Jan Kara <jack@suse.cz> |
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checkpoint.c | ||
commit.c | ||
journal.c | ||
Kconfig | ||
Makefile | ||
recovery.c | ||
revoke.c | ||
transaction.c |