devcgroup_inode_permission: take "is it a device node" checks to inlined wrapper

inode_permission() calls devcgroup_inode_permission() and almost all such calls are _not_ for device nodes; let's at least keep the common path straight...

Al Viro committed 15 years ago

Commit 482e0cd1 parent 8e833fd2 files · +10 −8Browse files

Showing the changes to include/linux (1 of 2 files). Show all

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include/linux/device_cgroup.h+9−1

@@ -2,8 +2,16 @@ · 1 unmodified line
2	2	#include <linux/fs.h>
3	3
4	4	#ifdef CONFIG_CGROUP_DEVICE
5		−extern int devcgroup_inode_permission(struct inode *inode, int mask);
	5	+extern int __devcgroup_inode_permission(struct inode *inode, int mask);
6	6	extern int devcgroup_inode_mknod(int mode, dev_t dev);
	7	+static inline int devcgroup_inode_permission(struct inode *inode, int mask)
	8	+{
	9	+ if (likely(!inode->i_rdev))
	10	+ return 0;
	11	+ if (!S_ISBLK(inode->i_mode) && !S_ISCHR(inode->i_mode))
	12	+ return 0;
	13	+ return __devcgroup_inode_permission(inode, mask);
	14	+}
7	15	#else
8	16	static inline int devcgroup_inode_permission(struct inode *inode, int mask)
9	17	{ return 0; }