UbiquitousOS
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OpenCloudOS-Kernel
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nvram: BKL pushdown 

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
This commit is contained in:
Arnd Bergmann 2008-05-20 19:16:26 +02:00 committed by Jonathan Corbet
parent fd3e05b6c8
commit 930ab4e532
1 changed files with 4 additions and 0 deletions
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4
drivers/char/nvram.c
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@ -107,6 +107,7 @@
#include <linux/init.h>
#include <linux/proc_fs.h>
#include <linux/spinlock.h>
#include <linux/smp_lock.h>
#include <asm/io.h>
#include <asm/uaccess.h>
@ -333,12 +334,14 @@ 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 & 2) && (nvram_open_mode & NVRAM_WRITE))) {
spin_unlock(&nvram_state_lock);
unlock_kernel();
return -EBUSY;
}
@ -349,6 +352,7 @@ nvram_open(struct inode *inode, struct file *file)
nvram_open_cnt++;
spin_unlock(&nvram_state_lock);
unlock_kernel();
return 0;
}