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Diffstat (limited to 'include/linux/device_cgroup.h')
-rw-r--r--include/linux/device_cgroup.h10
1 files changed, 9 insertions, 1 deletions
diff --git a/include/linux/device_cgroup.h b/include/linux/device_cgroup.h
index 0b0d9c3..7aad1f4 100644
--- a/include/linux/device_cgroup.h
+++ b/include/linux/device_cgroup.h
@@ -2,8 +2,16 @@
#include <linux/fs.h>
#ifdef CONFIG_CGROUP_DEVICE
-extern int devcgroup_inode_permission(struct inode *inode, int mask);
+extern int __devcgroup_inode_permission(struct inode *inode, int mask);
extern int devcgroup_inode_mknod(int mode, dev_t dev);
+static inline int devcgroup_inode_permission(struct inode *inode, int mask)
+{
+ if (likely(!inode->i_rdev))
+ return 0;
+ if (!S_ISBLK(inode->i_mode) && !S_ISCHR(inode->i_mode))
+ return 0;
+ return __devcgroup_inode_permission(inode, mask);
+}
#else
static inline int devcgroup_inode_permission(struct inode *inode, int mask)
{ return 0; }
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