AcoSail/kernel_optimize_test
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spidev: BKL pushdown

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Add the BKL to spidev_open(), even though the existing locking looks
adequate.

Signed-off-by: Jonathan Corbet <corbet@lwn.net>
This commit is contained in:
Jonathan Corbet 2008-05-16 13:46:14 -06:00
parent d21c95c569
commit 609f9e92b5
1 changed files with 3 additions and 0 deletions
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3
drivers/spi/spidev.c
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@ -29,6 +29,7 @@
#include <linux/errno.h>
#include <linux/mutex.h>
#include <linux/slab.h>
#include <linux/smp_lock.h>
#include <linux/spi/spi.h>
#include <linux/spi/spidev.h>
@ -393,6 +394,7 @@ static int spidev_open(struct inode *inode, struct file *filp)
struct spidev_data *spidev;
int status = -ENXIO;
lock_kernel();
mutex_lock(&device_list_lock);
list_for_each_entry(spidev, &device_list, device_entry) {
@ -418,6 +420,7 @@ static int spidev_open(struct inode *inode, struct file *filp)
pr_debug("spidev: nothing for minor %d\n", iminor(inode));
mutex_unlock(&device_list_lock);
unlock_kernel();
return status;
}