make timespec_equal() take const arguments

Make arguments of timespec_equal() const struct timespec.

Signed-off-by: Jan Engelhardt <jengelh@gmx.de>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: john stultz <johnstul@us.ibm.com>
Cc: Roman Zippel <zippel@linux-m68k.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

include/linux/time.h

diff --git a/include/linux/time.h b/include/linux/time.h
index 4bb05a8..ec3b0ce 100644
--- a/include/linux/time.h
+++ b/include/linux/time.h
@@ -36,7 +36,8 @@
 #define NSEC_PER_SEC	1000000000L
 #define FSEC_PER_SEC	1000000000000000L
 
-static inline int timespec_equal(struct timespec *a, struct timespec *b)
+static inline int timespec_equal(const struct timespec *a,
+                                 const struct timespec *b)
 {
 	return (a->tv_sec == b->tv_sec) && (a->tv_nsec == b->tv_nsec);
 }