linux-kernel - [tip:timers/core] sound: Use hrtimer_resolution instead of hrtimer_get

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Date:	Wed, 22 Apr 2015 12:05:37 -0700
From:	tip-bot for Thomas Gleixner <tipbot@...or.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	hpa@...or.com, linux-kernel@...r.kernel.org, tglx@...utronix.de,
	preeti@...ux.vnet.ibm.com, mingo@...nel.org, mtosatti@...hat.com,
	fweisbec@...il.com, perex@...ex.cz, viresh.kumar@...aro.org,
	tiwai@...e.de, peterz@...radead.org
Subject: [tip:timers/core] sound:
  Use hrtimer_resolution instead of hrtimer_get_res()

Commit-ID:  447fbbdc2cd58cdaf410fefef365a9ce38833157
Gitweb:     http://git.kernel.org/tip/447fbbdc2cd58cdaf410fefef365a9ce38833157
Author:     Thomas Gleixner <tglx@...utronix.de>
AuthorDate: Tue, 14 Apr 2015 21:08:30 +0000
Committer:  Thomas Gleixner <tglx@...utronix.de>
CommitDate: Wed, 22 Apr 2015 17:06:48 +0200

sound: Use hrtimer_resolution instead of hrtimer_get_res()

No point in converting a timespec now that the value is directly
accessible. Get rid of the null check while at it. Resolution is
guaranteed to be > 0.

Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
Acked-by: Takashi Iwai <tiwai@...e.de>
Acked-by: Peter Zijlstra <peterz@...radead.org>
Cc: Preeti U Murthy <preeti@...ux.vnet.ibm.com>
Cc: Viresh Kumar <viresh.kumar@...aro.org>
Cc: Marcelo Tosatti <mtosatti@...hat.com>
Cc: Frederic Weisbecker <fweisbec@...il.com>
Cc: Jaroslav Kysela <perex@...ex.cz>
Cc: alsa-devel@...a-project.org
Link: http://lkml.kernel.org/r/20150414203500.799133359@linutronix.de
Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
---
 sound/core/hrtimer.c      |  9 +--------
 sound/drivers/pcsp/pcsp.c | 15 ++++++---------
 2 files changed, 7 insertions(+), 17 deletions(-)

diff --git a/sound/core/hrtimer.c b/sound/core/hrtimer.c
index 886be7d..f845ecf 100644
--- a/sound/core/hrtimer.c
+++ b/sound/core/hrtimer.c
@@ -121,16 +121,9 @@ static struct snd_timer *mytimer;
 static int __init snd_hrtimer_init(void)
 {
 	struct snd_timer *timer;
-	struct timespec tp;
 	int err;
 
-	hrtimer_get_res(CLOCK_MONOTONIC, &tp);
-	if (tp.tv_sec > 0 || !tp.tv_nsec) {
-		pr_err("snd-hrtimer: Invalid resolution %u.%09u",
-			   (unsigned)tp.tv_sec, (unsigned)tp.tv_nsec);
-		return -EINVAL;
-	}
-	resolution = tp.tv_nsec;
+	resolution = hrtimer_resolution;
 
 	/* Create a new timer and set up the fields */
 	err = snd_timer_global_new("hrtimer", SNDRV_TIMER_GLOBAL_HRTIMER,
diff --git a/sound/drivers/pcsp/pcsp.c b/sound/drivers/pcsp/pcsp.c
index d9647bd..eb54702 100644
--- a/sound/drivers/pcsp/pcsp.c
+++ b/sound/drivers/pcsp/pcsp.c
@@ -42,16 +42,13 @@ struct snd_pcsp pcsp_chip;
 static int snd_pcsp_create(struct snd_card *card)
 {
 	static struct snd_device_ops ops = { };
-	struct timespec tp;
-	int err;
-	int div, min_div, order;
-
-	hrtimer_get_res(CLOCK_MONOTONIC, &tp);
+	unsigned int resolution = hrtimer_resolution;
+	int err, div, min_div, order;
 
 	if (!nopcm) {
-		if (tp.tv_sec || tp.tv_nsec > PCSP_MAX_PERIOD_NS) {
+		if (resolution > PCSP_MAX_PERIOD_NS) {
 			printk(KERN_ERR "PCSP: Timer resolution is not sufficient "
-				"(%linS)\n", tp.tv_nsec);
+				"(%linS)\n", resolution);
 			printk(KERN_ERR "PCSP: Make sure you have HPET and ACPI "
 				"enabled.\n");
 			printk(KERN_ERR "PCSP: Turned into nopcm mode.\n");
@@ -59,13 +56,13 @@ static int snd_pcsp_create(struct snd_card *card)
 		}
 	}
 
-	if (loops_per_jiffy >= PCSP_MIN_LPJ && tp.tv_nsec <= PCSP_MIN_PERIOD_NS)
+	if (loops_per_jiffy >= PCSP_MIN_LPJ && resolution <= PCSP_MIN_PERIOD_NS)
 		min_div = MIN_DIV;
 	else
 		min_div = MAX_DIV;
 #if PCSP_DEBUG
 	printk(KERN_DEBUG "PCSP: lpj=%li, min_div=%i, res=%li\n",
-	       loops_per_jiffy, min_div, tp.tv_nsec);
+	       loops_per_jiffy, min_div, resolution);
 #endif
 
 	div = MAX_DIV / min_div;
--
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