From: Mark Fasheh <mark.fasheh@oracle.com>
Date: Tue, 17 Oct 2006 08:31:38 +0000 (+0200)
Subject: [PATCH] Take i_mutex in splice_from_pipe()
X-Git-Tag: v2.6.19-rc3~32^2~3
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=62752ee198dca9209b7dee504763e51b11e9e0ca;p=pandora-kernel.git

[PATCH] Take i_mutex in splice_from_pipe()

The splice_actor may be calling ->prepare_write() and ->commit_write(). We
want i_mutex on the inode being written to before calling those so that we
don't race i_size changes.

The double locking behavior is done elsewhere in splice.c, and if we
eventually want _nolock variants of generic_file_splice_write(), fs modules
might have to replicate the nasty locking code. We introduce
inode_double_lock() and inode_double_unlock() to consolidate the locking
rules into one set of functions.

Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
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