tree 58038ee825096fec9f330fe187e615bb7c2e8422
parent 5e3c3ac9db432fbdd2da92ce0f12d7912706c689
author Davide Libenzi <davidel@xmailserver.org> 1192602619 -0700
committer Linus Torvalds <torvalds@woody.linux-foundation.org> 1192635780 -0700

anon-inodes use open coded atomic_inc for the shared inode

Since we know the shared inode count is always >0, we can avoid igrab()
and use an open coded atomic_inc().

This also fixes a bug noticed by Yan Zheng <yanzheng@21cn.com>: were checking
for an IS_ERR() return from igrab(), but it actually returns NULL on error.

Signed-off-by: Davide Libenzi <davidel@xmailserver.org>
Cc: Yan Zheng <yanzheng@21cn.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>