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| author | Arnd Bergmann <arnd@arndb.de> | 2008-05-20 19:16:26 +0200 |
|---|---|---|
| committer | Jonathan Corbet <corbet@lwn.net> | 2008-07-02 15:06:23 -0600 |
| commit | 930ab4e532623795f934467c452a8c71be2c30fe (patch) | |
| tree | a17dc331afeeddb2533d20bcd5f66821da919421 | |
| parent | fd3e05b6c82ebee06f888482975172028e89382d (diff) | |
| download | linux-930ab4e532623795f934467c452a8c71be2c30fe.tar.bz2 | |
nvram: BKL pushdown
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
| -rw-r--r-- | drivers/char/nvram.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/char/nvram.c b/drivers/char/nvram.c index 98dec380af49..197cd7a0c332 100644 --- a/drivers/char/nvram.c +++ b/drivers/char/nvram.c @@ -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; } |