From: Jonathan Corbet <corbet@lwn.net>
Date: Fri, 20 Jun 2008 15:12:01 +0000 (-0600)
Subject: Call fasync() functions without the BKL
X-Git-Tag: v2.6.27-rc1~1103^2~4
X-Git-Url: http://pilppa.com/gitweb/?a=commitdiff_plain;h=a238b790d5f99c7832f9b73ac8847025815b85f7;p=linux-2.6-omap-h63xx.git

Call fasync() functions without the BKL

lock_kernel() calls have been pushed down into code which needs it, so
there is no need to take the BKL at this level anymore.

This work inspired and aided by Andi Kleen's unlocked_fasync() patches.

Acked-by: Andi Kleen <ak@linux.intel.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
---

diff --git a/fs/fcntl.c b/fs/fcntl.c
index bfd776509a7..330a7d78259 100644
--- a/fs/fcntl.c
+++ b/fs/fcntl.c
@@ -12,7 +12,6 @@
 #include <linux/fdtable.h>
 #include <linux/capability.h>
 #include <linux/dnotify.h>
-#include <linux/smp_lock.h>
 #include <linux/slab.h>
 #include <linux/module.h>
 #include <linux/security.h>
@@ -227,7 +226,6 @@ static int setfl(int fd, struct file * filp, unsigned long arg)
 	if (error)
 		return error;
 
-	lock_kernel();
 	if ((arg ^ filp->f_flags) & FASYNC) {
 		if (filp->f_op && filp->f_op->fasync) {
 			error = filp->f_op->fasync(fd, filp, (arg & FASYNC) != 0);
@@ -238,7 +236,6 @@ static int setfl(int fd, struct file * filp, unsigned long arg)
 
 	filp->f_flags = (arg & SETFL_MASK) | (filp->f_flags & ~SETFL_MASK);
  out:
-	unlock_kernel();
 	return error;
 }