From: Al Viro <viro@zeniv.linux.org.uk>
Date: Fri, 14 Mar 2014 16:02:47 +0000 (-0400)
Subject: mark struct file that had write access grabbed by open()
X-Git-Tag: v3.15-rc1~16^2~53
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=83f936c75e3689a63253d89c47a4d239c56d7410;p=pandora-kernel.git

mark struct file that had write access grabbed by open()

new flag in ->f_mode - FMODE_WRITER.  Set by do_dentry_open() in case
when it has grabbed write access, checked by __fput() to decide whether
it wants to drop the sucker.  Allows to stop bothering with mnt_clone_write()
in alloc_file(), along with fewer special_file() checks.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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