tree 0bf02984aef945c5d97a5929b82e7ecd6b7f39ed
parent 5b3fe63b19e00f3b2a14a09c979e84163029e390
author Alexey Dobriyan <adobriyan@sw.ru> 1202473107 -0800
committer Linus Torvalds <torvalds@woody.linux-foundation.org> 1202491343 -0800

proc: less LOCK operations during lookup

Pseudo-code for lookup effectively is:

	LOCK kernel
	LOCK proc_subdir_lock
		find PDE
		UNLOCK proc_subdir_lock

		get inode

		LOCK proc_subdir_lock
		goto unlock
	UNLOCK proc_subdir_lock
	UNLOCK kernel

We can get rid of LOCK/UNLOCK pair after getting inode simply by jumping
to unlock_kernel() directly.

Signed-off-by: Alexey Dobriyan <adobriyan@sw.ru>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>