linux-kernel - [tip:timers/core] posix-timers: Remove useless res field from k

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Date:	Wed, 2 Feb 2011 22:00:37 GMT
From:	tip-bot for Thomas Gleixner <tglx@...utronix.de>
To:	linux-tip-commits@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, hpa@...or.com, mingo@...hat.com,
	johnstul@...ibm.com, tglx@...utronix.de, richard.cochran@...cron.at
Subject: [tip:timers/core] posix-timers: Remove useless res field from k_clock

Commit-ID:  ebaac757acae0431e2c79c00e09f1debdabbddd7
Gitweb:     http://git.kernel.org/tip/ebaac757acae0431e2c79c00e09f1debdabbddd7
Author:     Thomas Gleixner <tglx@...utronix.de>
AuthorDate: Tue, 1 Feb 2011 13:51:56 +0000
Committer:  Thomas Gleixner <tglx@...utronix.de>
CommitDate: Wed, 2 Feb 2011 15:28:15 +0100

posix-timers: Remove useless res field from k_clock

The res member of kclock is only used by mmtimer.c, but even there it
contains redundant information. Remove the field and fixup mmtimer.

Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
Acked-by: John Stultz <johnstul@...ibm.com>
Tested-by: Richard Cochran <richard.cochran@...cron.at>
LKML-Reference: <20110201134418.808714587@...utronix.de>
---
 drivers/char/mmtimer.c       |    5 ++---
 include/linux/posix-timers.h |    1 -
 kernel/posix-timers.c        |    2 --
 3 files changed, 2 insertions(+), 6 deletions(-)

diff --git a/drivers/char/mmtimer.c b/drivers/char/mmtimer.c
index 141ffae..ff41eb3 100644
--- a/drivers/char/mmtimer.c
+++ b/drivers/char/mmtimer.c
@@ -768,12 +768,11 @@ static int sgi_timer_set(struct k_itimer *timr, int flags,
 static int sgi_clock_getres(const clockid_t which_clock, struct timespec *tp)
 {
 	tp->tv_sec = 0;
-	tp->tv_nsec = sgi_clock.res;
+	tp->tv_nsec = sgi_clock_period;
 	return 0;
 }
 
 static struct k_clock sgi_clock = {
-	.res = 0,
 	.clock_set	= sgi_clock_set,
 	.clock_get	= sgi_clock_get,
 	.clock_getres	= sgi_clock_getres,
@@ -840,7 +839,7 @@ static int __init mmtimer_init(void)
 			(unsigned long) node);
 	}
 
-	sgi_clock_period = sgi_clock.res = NSEC_PER_SEC / sn_rtc_cycles_per_second;
+	sgi_clock_period = NSEC_PER_SEC / sn_rtc_cycles_per_second;
 	register_posix_clock(CLOCK_SGI_CYCLE, &sgi_clock);
 
 	printk(KERN_INFO "%s: v%s, %ld MHz\n", MMTIMER_DESC, MMTIMER_VERSION,
diff --git a/include/linux/posix-timers.h b/include/linux/posix-timers.h
index 4aaf0c5..ef574d1 100644
--- a/include/linux/posix-timers.h
+++ b/include/linux/posix-timers.h
@@ -67,7 +67,6 @@ struct k_itimer {
 };
 
 struct k_clock {
-	int res;		/* in nanoseconds */
 	int (*clock_getres) (const clockid_t which_clock, struct timespec *tp);
 	int (*clock_set) (const clockid_t which_clock,
 			  const struct timespec *tp);
diff --git a/kernel/posix-timers.c b/kernel/posix-timers.c
index 748497f..f9142a9 100644
--- a/kernel/posix-timers.c
+++ b/kernel/posix-timers.c
@@ -204,8 +204,6 @@ static inline int invalid_clockid(const clockid_t which_clock)
 		return 1;
 	if (posix_clocks[which_clock].clock_getres != NULL)
 		return 0;
-	if (posix_clocks[which_clock].res != 0)
-		return 0;
 	return 1;
 }
 
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