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authorArnd Bergmann <arnd@arndb.de>2008-05-20 19:16:33 +0200
committerJonathan Corbet <corbet@lwn.net>2008-07-02 23:06:24 +0200
commitdb26e64dc3f0d51c4db1a625c248a81f7850eee9 (patch)
tree52d748b63a3e9e5f8b385737641acc8640711d28 /kernel/pm_qos_params.c
parentparisc-kernel-perf: BKL pushdown (diff)
downloadlinux-db26e64dc3f0d51c4db1a625c248a81f7850eee9.tar.xz
linux-db26e64dc3f0d51c4db1a625c248a81f7850eee9.zip
pm_qos_params: BKL pushdown
[jmc: added <linux/smp_lock.h>] Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Diffstat (limited to '')
-rw-r--r--kernel/pm_qos_params.c7
1 files changed, 6 insertions, 1 deletions
diff --git a/kernel/pm_qos_params.c b/kernel/pm_qos_params.c
index 0afe32be4c85..8cb757026386 100644
--- a/kernel/pm_qos_params.c
+++ b/kernel/pm_qos_params.c
@@ -29,6 +29,7 @@
#include <linux/pm_qos_params.h>
#include <linux/sched.h>
+#include <linux/smp_lock.h>
#include <linux/spinlock.h>
#include <linux/slab.h>
#include <linux/time.h>
@@ -358,15 +359,19 @@ static int pm_qos_power_open(struct inode *inode, struct file *filp)
int ret;
long pm_qos_class;
+ lock_kernel();
pm_qos_class = find_pm_qos_object_by_minor(iminor(inode));
if (pm_qos_class >= 0) {
filp->private_data = (void *)pm_qos_class;
sprintf(name, "process_%d", current->pid);
ret = pm_qos_add_requirement(pm_qos_class, name,
PM_QOS_DEFAULT_VALUE);
- if (ret >= 0)
+ if (ret >= 0) {
+ unlock_kernel();
return 0;
+ }
}
+ unlock_kernel();
return -EPERM;
}