ktime: Cleanup ktime_set() usage

ktime_set(S,N) was required for the timespec storage type and is still
useful for situations where a Seconds and Nanoseconds part of a time value
needs to be converted. For anything where the Seconds argument is 0, this
is pointless and can be replaced with a simple assignment.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Peter Zijlstra <peterz@infradead.org>

fs/timerfd.c

@@ -155,7 +155,7 @@ static ktime_t timerfd_get_remaining(struct timerfd_ctx *ctx)
 	else
 		remaining = hrtimer_expires_remaining_adjusted(&ctx->t.tmr);
 
-	return remaining < 0 ? ktime_set(0, 0): remaining;
+	return remaining < 0 ? 0: remaining;
 }
 
 static int timerfd_setup(struct timerfd_ctx *ctx, int flags,