tree d0678f0f8c82f3c2b2c66a6b47242eef1b323142
parent cb1817b37313b4b6c7f8f93c730553dd3cb6ac57
author Dave Chinner <dchinner@redhat.com> 1301382530 +1100
committer Linus Torvalds <torvalds@linux-foundation.org> 1301410234 -0700

fs: don't use igrab() while holding i_lock

Fix the incorrect use of igrab() inside the i_lock in NFS and Ceph‥

If we are already holding the i_lock, we have a reference to the
inode so we can safely use ihold() to gain an extra reference. This
avoids hangs due to lock recursion on the i_lock now that the
inode_lock is gone and igrab() uses the i_lock itself.

Signed-off-by: Dave Chinner <dchinner@redhat.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: linux-fsdevel@vger.kernel.org
Cc: Ryan Mallon <ryan@bluewatersys.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>