From: Louis Rilling <louis.rilling@kerlabs.com>
Date: Fri, 4 Dec 2009 13:52:42 +0000 (+0100)
Subject: block: Fix io_context leak after failure of clone with CLONE_IO
X-Git-Tag: v2.6.33-rc1~379^2~6
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=b69f2292063d2caf37ca9aec7d63ded203701bf3;p=pandora-kernel.git

block: Fix io_context leak after failure of clone with CLONE_IO

With CLONE_IO, parent's io_context->nr_tasks is incremented, but never
decremented whenever copy_process() fails afterwards, which prevents
exit_io_context() from calling IO schedulers exit functions.

Give a task_struct to exit_io_context(), and call exit_io_context() instead of
put_io_context() in copy_process() cleanup path.

Signed-off-by: Louis Rilling <louis.rilling@kerlabs.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
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