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Commit 0244756edc4b ("ufs: sb mutex merge + mutex_destroy") introduces deadlocks in ufs_new_inode() and ufs_free_inode(). Most callers of that functions acqure the mutex by themselves and ufs_{new,free}_inode() do that via lock_ufs(), i.e we have an unavoidable double lock. The patch proposes to resolve the issue by making sure that ufs_{new,free}_inode() are not called with the mutex held. Found by Linux Driver Verification project (linuxtesting.org). Cc: stable@vger.kernel.org # 3.16 Signed-off-by: Alexey Khoroshilov <khoroshilov@ispras.ru> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>