From: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
Date: Sun, 31 Jan 2010 10:46:40 +0000 (+0900)
Subject: nilfs2: fix potential hang in nilfs_error on errors=remount-ro
X-Git-Tag: v2.6.34-rc1~213^2~6
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=fe5f171bb272946ce5fbf843ce2f8467d0d41b9a;p=pandora-kernel.git

nilfs2: fix potential hang in nilfs_error on errors=remount-ro

nilfs_error() calls nilfs_detach_segment_constructor() if
errors=remount-ro option is specified, and this may lead to a hang due
to recursive locking of, for instance, nilfs->ns_segctor_sem and
others.

In this case, detaching segment constructor is not necessary because
read-only flag is set to the filesystem and further writes are
blocked.

This fixes the potential hang issue by removing the
nilfs_detach_segment_constructor() call from nilfs_error.

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