From: Al Viro <viro@zeniv.linux.org.uk>
Date: Sun, 19 Jun 2011 00:42:00 +0000 (-0400)
Subject: proc_sys_permission() is OK in RCU mode
X-Git-Tag: upstream/snapshot3+hdmi~9830^2~3
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=1aec7036d0c2996c86ce483ca0a28f3b20807b43;p=platform%2Fadaptation%2Frenesas_rcar%2Frenesas_kernel.git

proc_sys_permission() is OK in RCU mode

nothing blocking there, since all instances of sysctl
->permissions() method are non-blocking - both of them,
that is.

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

diff --git a/fs/proc/proc_sysctl.c b/fs/proc/proc_sysctl.c
index f50133c..d167de3 100644
--- a/fs/proc/proc_sysctl.c
+++ b/fs/proc/proc_sysctl.c
@@ -304,9 +304,6 @@ static int proc_sys_permission(struct inode *inode, int mask,unsigned int flags)
 	struct ctl_table *table;
 	int error;
 
-	if (flags & IPERM_FLAG_RCU)
-		return -ECHILD;
-
 	/* Executable files are not allowed under /proc/sys/ */
 	if ((mask & MAY_EXEC) && S_ISREG(inode->i_mode))
 		return -EACCES;