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authorH. Peter Anvin <hpa@zytor.com>2009-12-14 10:02:18 -0800
committerH. Peter Anvin <hpa@zytor.com>2009-12-14 10:05:05 -0800
commit494c2ebfb287eb10b229415063099e3700639028 (patch)
treeac55499ae26219e6c4eaad3b73fd143104048d65 /arch/x86/kernel/msr.c
parent70fe440718d9f42bf963c2cffe12008eb5556165 (diff)
x86, msr: Remove incorrect, duplicated code in the MSR driver
The MSR driver would compute the values for cpu and c at declaration, and then again in the body of the function. This isn't merely redundant, but unsafe, since cpu might not refer to a valid CPU at that point. Remove the unnecessary and dangerous references in the declarations. This code now matches the equivalent code in the CPUID driver. Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Diffstat (limited to 'arch/x86/kernel/msr.c')
-rw-r--r--arch/x86/kernel/msr.c5
1 files changed, 2 insertions, 3 deletions
diff --git a/arch/x86/kernel/msr.c b/arch/x86/kernel/msr.c
index 553449951b8..572b07eee3f 100644
--- a/arch/x86/kernel/msr.c
+++ b/arch/x86/kernel/msr.c
@@ -172,11 +172,10 @@ static long msr_ioctl(struct file *file, unsigned int ioc, unsigned long arg)
static int msr_open(struct inode *inode, struct file *file)
{
- unsigned int cpu = iminor(file->f_path.dentry->d_inode);
- struct cpuinfo_x86 *c = &cpu_data(cpu);
+ unsigned int cpu;
+ struct cpuinfo_x86 *c;
cpu = iminor(file->f_path.dentry->d_inode);
-
if (cpu >= nr_cpu_ids || !cpu_online(cpu))
return -ENXIO; /* No such CPU */