Commit ec03d707 authored Feb 06, 2008 by Andrew Morton Committed by Linus Torvalds Feb 06, 2008

speed up jiffies conversion functions if HZ==USER_HZ

Avoid calling do_div(x, 1) in this case.

Cc: David Fries <david@fries.net>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

parent 6ffc787a

kernel/time.c

+3 −1

Original line number	Diff line number	Diff line
		@@ -606,8 +606,10 @@ u64 jiffies_64_to_clock_t(u64 x)
		# if HZ < USER_HZ
		x *= USER_HZ;
		do_div(x, HZ);
		# else
		# elif HZ > USER_HZ
		do_div(x, HZ / USER_HZ);
		# else
		/* Nothing to do */
		# endif
		#else
		/*