From: Zhang Qiang <zhangqiang.buaa@gmail.com>
Date: Tue, 18 Aug 2009 06:58:24 +0000 (+0800)
Subject: nilfs2: missing a read lock for segment writer in nilfs_attach_checkpoint()
X-Git-Tag: v2.6.31-rc7~9^2~1
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=1154ecbd2f8298ef75609f5f8ed5aca96be599fb;p=pandora-kernel.git

nilfs2: missing a read lock for segment writer in nilfs_attach_checkpoint()

'ns_cno' of structure 'the_nilfs' must be protected from segment
writer, in other words, the caller of nilfs_get_checkpoint should hold
read lock for nilfs->ns_segctor_sem.  This patch adds the lock/unlock
operations in nilfs_attach_checkpoint() when calling
nilfs_cpfile_get_checkpoint().

Signed-off-by: Zhang Qiang <zhangqiang.buaa@gmail.com>
Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
---

Reading git-diff-tree failed