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Diffstat (limited to 'kernel/include/linux/device_cgroup.h')
-rw-r--r--kernel/include/linux/device_cgroup.h19
1 files changed, 19 insertions, 0 deletions
diff --git a/kernel/include/linux/device_cgroup.h b/kernel/include/linux/device_cgroup.h
new file mode 100644
index 000000000..8b64221b4
--- /dev/null
+++ b/kernel/include/linux/device_cgroup.h
@@ -0,0 +1,19 @@
+#include <linux/fs.h>
+
+#ifdef CONFIG_CGROUP_DEVICE
+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; }
+static inline int devcgroup_inode_mknod(int mode, dev_t dev)
+{ return 0; }
+#endif