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| author |   Frederic Weisbecker <fweisbec@gmail.com> | 2009-10-09 21:20:30 +0200 |
|---|---|---|
| committer |   Thomas Gleixner <tglx@linutronix.de> | 2009-10-14 17:36:49 +0200 |
| commit | 6783b9cd7104470a3afab51c205c5aea53a2858f (patch) | |
| tree | 461b15ff61a7c737e2fef8af8db928c4ae4e7798 /drivers/char/generic_nvram.c | |
| parent | mem_class: Drop the bkl from memory_open() (diff) | |
| download | linux-dev-6783b9cd7104470a3afab51c205c5aea53a2858f.tar.xz linux-dev-6783b9cd7104470a3afab51c205c5aea53a2858f.zip | |
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>
Diffstat (limited to 'drivers/char/generic_nvram.c')
| -rw-r--r-- | drivers/char/generic_nvram.c | 9 |
1 files changed, 3 insertions, 6 deletions
diff --git a/drivers/char/generic_nvram.c b/drivers/char/generic_nvram.c index ef31738c2cbe..fda4181b5e67 100644 --- a/drivers/char/generic_nvram.c +++ b/drivers/char/generic_nvram.c @@ -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; } |