From: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
Date: Mon, 5 Jul 2010 05:27:04 +0000 (+0900)
Subject: nilfs2: add nodiscard mount option
X-Git-Tag: v2.6.36-rc1~500^2~26
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=802d31775404ee335ca1e97a82e1e706a4c843be;p=pandora-kernel.git

nilfs2: add nodiscard mount option

Nilfs has "discard" mount option which issues discard/TRIM commands to
underlying block device, but it lacks a complementary option and has
no way to disable the feature through remount.

This adds "nodiscard" option to resolve this imbalance.

Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
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