From: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Date: Tue, 23 Jun 2009 09:30:43 +0000 (+0300)
Subject: UBIFS: slightly optimize write-buffer timer usage
X-Git-Tag: v2.6.31-rc3~22^2~11
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=0b335b9d7d5f0b832e90ac469480789c07be80ad;p=pandora-kernel.git

UBIFS: slightly optimize write-buffer timer usage

This patch adds the following minor optimization:

1. If write-buffer does not use the timer, indicate it with the
   wbuf->no_timer variable, instead of using the wbuf->softlimit
   variable. This is better because wbuf->softlimit is of ktime_t
   type, and the ktime_to_ns function contains 64-bit multiplication.

2. Do not call the 'hrtimer_cancel()' function for write-buffers
   which do not use timers.

3. Do not cancel the timer in 'ubifs_put_super()' because the
   synchronization function does this.

This patch also removes a confusing comment.

Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
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