UbiquitousOS
/
OpenCloudOS-Kernel
mirror of https://gitee.com/OpenCloudOS/OpenCloudOS-Kernel.git
11
0
Fork 0
Code Issues Projects Releases Wiki Activity

nvram: Drop the BKL from nvram_open() 

It's safe to remove the BKL from nvram_open(): there's no open()
versus read() races: nvram_init() is very simple and race-free,
it registers the device then puts it into /proc - there's no
state init to race with.

Cc: Wim Van Sebroeck <wim@iguana.be>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
LKML-Reference: <1255116426-7270-1-git-send-email-fweisbec@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Ingo Molnar 2009-10-14 17:48:38 +02:00
parent 55e858c848
commit 83cb167270
1 changed files with 0 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
drivers/char/nvram.c
View File

@ -329,14 +329,12 @@ static int nvram_ioctl(struct inode *inode, struct file *file,
static int nvram_open(struct inode *inode, struct file *file)
{
lock_kernel();
spin_lock(&nvram_state_lock);
if ((nvram_open_cnt && (file->f_flags & O_EXCL)) ||
(nvram_open_mode & NVRAM_EXCL) ||
((file->f_mode & FMODE_WRITE) && (nvram_open_mode & NVRAM_WRITE))) {
spin_unlock(&nvram_state_lock);
unlock_kernel();
return -EBUSY;
}
@ -347,7 +345,6 @@ static int nvram_open(struct inode *inode, struct file *file)
nvram_open_cnt++;
spin_unlock(&nvram_state_lock);
unlock_kernel();
return 0;
}