linux-kernel - [tip:bkl/arch] um: Remove BKL from random

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Message-ID: <tip-df502e389383b219e44819fe757614450d95f297@git.kernel.org>
Date:	Wed, 14 Oct 2009 15:45:34 GMT
From:	tip-bot for Thomas Gleixner <tglx@...utronix.de>
To:	linux-tip-commits@...r.kernel.org
Cc:	jdike@...toit.com, linux-kernel@...r.kernel.org, hpa@...or.com,
	mingo@...hat.com, tglx@...utronix.de
Subject: [tip:bkl/arch] um: Remove BKL from random

Commit-ID:  df502e389383b219e44819fe757614450d95f297
Gitweb:     http://git.kernel.org/tip/df502e389383b219e44819fe757614450d95f297
Author:     Thomas Gleixner <tglx@...utronix.de>
AuthorDate: Sat, 10 Oct 2009 15:36:30 +0000
Committer:  Thomas Gleixner <tglx@...utronix.de>
CommitDate: Wed, 14 Oct 2009 15:35:51 +0200

um: Remove BKL from random

cycle_kernel_lock() was added during the big BKL pushdown. It should
ensure the serializiation against driver init code. In this case there
is nothing to serialize. Remove it.

Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
LKML-Reference: <20091010153349.641118498@...utronix.de>
Cc: Jeff Dike <jdike@...toit.com>
---
 arch/um/drivers/random.c |    3 ---
 1 files changed, 0 insertions(+), 3 deletions(-)

diff --git a/arch/um/drivers/random.c b/arch/um/drivers/random.c
index 6eabb70..4949044 100644
--- a/arch/um/drivers/random.c
+++ b/arch/um/drivers/random.c
@@ -7,7 +7,6 @@
  * of the GNU General Public License, incorporated herein by reference.
  */
 #include <linux/sched.h>
-#include <linux/smp_lock.h>
 #include <linux/module.h>
 #include <linux/fs.h>
 #include <linux/interrupt.h>
@@ -34,8 +33,6 @@ static DECLARE_WAIT_QUEUE_HEAD(host_read_wait);
 
 static int rng_dev_open (struct inode *inode, struct file *filp)
 {
-	cycle_kernel_lock();
-
 	/* enforce read-only access to this chrdev */
 	if ((filp->f_mode & FMODE_READ) == 0)
 		return -EINVAL;
--
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