linux-kernel - [tip:x86/cpu] x86, cpuid: Remove the bkl from cpuid

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Date:	Wed, 7 Oct 2009 22:43:13 GMT
From:	tip-bot for John Kacur <jkacur@...hat.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, hpa@...or.com, mingo@...hat.com,
	jkacur@...hat.com, tglx@...utronix.de
Subject: [tip:x86/cpu] x86, cpuid: Remove the bkl from cpuid_open()

Commit-ID:  170a0bc3808909d8ea0f3f9c725c6565efe7f9c4
Gitweb:     http://git.kernel.org/tip/170a0bc3808909d8ea0f3f9c725c6565efe7f9c4
Author:     John Kacur <jkacur@...hat.com>
AuthorDate: Wed, 7 Oct 2009 20:19:32 +0200
Committer:  H. Peter Anvin <hpa@...or.com>
CommitDate: Wed, 7 Oct 2009 15:41:21 -0700

x86, cpuid: Remove the bkl from cpuid_open()

Most of the variables are local to the function. It IS possible that
for struct cpuinfo_x86 *c c could point to the same area. However,
this is used read only.

Signed-off-by: John Kacur <jkacur@...hat.com>
LKML-Reference: <alpine.LFD.2.00.0910072016190.15183@...alhost.localdomain>
Signed-off-by: H. Peter Anvin <hpa@...or.com>
---
 arch/x86/kernel/cpuid.c |    3 ---
 1 files changed, 0 insertions(+), 3 deletions(-)

diff --git a/arch/x86/kernel/cpuid.c b/arch/x86/kernel/cpuid.c
index b07af88..ef69284 100644
--- a/arch/x86/kernel/cpuid.c
+++ b/arch/x86/kernel/cpuid.c
@@ -118,8 +118,6 @@ static int cpuid_open(struct inode *inode, struct file *file)
 	struct cpuinfo_x86 *c;
 	int ret = 0;
 
-	lock_kernel();
-
 	cpu = iminor(file->f_path.dentry->d_inode);
 	if (cpu >= nr_cpu_ids || !cpu_online(cpu)) {
 		ret = -ENXIO;	/* No such CPU */
@@ -129,7 +127,6 @@ static int cpuid_open(struct inode *inode, struct file *file)
 	if (c->cpuid_level < 0)
 		ret = -EIO;	/* CPUID not supported */
 out:
-	unlock_kernel();
 	return ret;
 }
 
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