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@redhat.com>
LKML-Reference: <alpine.LFD.2.00.0910072016190.15183@localhost.localdomain>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>

diff --git a/arch/x86/kernel/cpuid.c b/arch/x86/kernel/cpuid.c
index b07af88..ef69284 100644 (file)
--- 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;
 }