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nvram: Drop the bkl from nvram_llseek() 

There is nothing to protect inside nvram_llseek(), the file
offset doesn't need to be protected and nvram_len is only
initialized from an __init path.

It's safe to remove the big kernel lock there.

Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
LKML-Reference: <1255116030-6929-1-git-send-email-fweisbec@gmail.com>
Cc: Greg KH <gregkh@suse.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Frederic Weisbecker 2009-10-09 21:20:30 +02:00 committed by Thomas Gleixner
parent 205153aa40
commit 6783b9cd71
1 changed files with 3 additions and 6 deletions
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9
drivers/char/generic_nvram.c
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@ -19,7 +19,6 @@
#include <linux/miscdevice.h>
#include <linux/fcntl.h>
#include <linux/init.h>
#include <linux/smp_lock.h>
#include <asm/uaccess.h>
#include <asm/nvram.h>
#ifdef CONFIG_PPC_PMAC
@ -32,7 +31,6 @@ static ssize_t nvram_len;
static loff_t nvram_llseek(struct file *file, loff_t offset, int origin)
{
lock_kernel();
switch (origin) {
case 1:
offset += file->f_pos;
@ -41,12 +39,11 @@ static loff_t nvram_llseek(struct file *file, loff_t offset, int origin)
offset += nvram_len;
break;
}
if (offset < 0) {
unlock_kernel();
if (offset < 0)
return -EINVAL;
}
file->f_pos = offset;
unlock_kernel();
return file->f_pos;
}