From: Miklos Szeredi <miklos@szeredi.hu>
Date: Wed, 26 Apr 2006 08:49:06 +0000 (+0200)
Subject: [fuse] fix deadlock between fuse_put_super() and request_end(), try #2
X-Git-Tag: v2.6.17-rc3~15
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=6dbbcb120570d747b00783820ee02d1e1bcf63de;p=pandora-kernel.git

[fuse] fix deadlock between fuse_put_super() and request_end(), try #2

A deadlock was possible, when the last reference to the superblock was
held due to a background request containing a file reference.

Releasing the file would release the vfsmount which in turn would
release the superblock.  Since sbput_sem is held during the fput() and
fuse_put_super() tries to acquire this same semaphore, a deadlock
results.

The solution is to move the fput() outside the region protected by
sbput_sem.

Signed-off-by: Miklos Szeredi <miklos@szeredi.hu>
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