From: Ingo Molnar <mingo@elte.hu>
Date: Mon, 29 Dec 2008 08:42:58 +0000 (+0100)
Subject: Merge branch 'linus' into timers/hrtimers
X-Git-Tag: v3.12-rc1~14955^4~6^4~4
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=0ce74d9296c971b2355c26984ad0bc538e34dd6c;p=kernel%2Fkernel-generic.git

Merge branch 'linus' into timers/hrtimers

Conflicts:
	sound/drivers/pcsp/pcsp.c

Semantic conflict:

        sound/core/hrtimer.c
---

0ce74d9296c971b2355c26984ad0bc538e34dd6c
diff --cc sound/core/hrtimer.c
index 0000000,c1d2859..34c7d48
mode 000000,100644..100644
--- a/sound/core/hrtimer.c
+++ b/sound/core/hrtimer.c
@@@ -1,0 -1,155 +1,154 @@@
+ /*
+  * ALSA timer back-end using hrtimer
+  * Copyright (C) 2008 Takashi Iwai
+  *
+  *   This program is free software; you can redistribute it and/or modify
+  *   it under the terms of the GNU General Public License as published by
+  *   the Free Software Foundation; either version 2 of the License, or
+  *   (at your option) any later version.
+  *
+  *   This program is distributed in the hope that it will be useful,
+  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  *   GNU General Public License for more details.
+  *
+  *   You should have received a copy of the GNU General Public License
+  *   along with this program; if not, write to the Free Software
+  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
+  *
+  */
+ 
+ #include <linux/init.h>
+ #include <linux/module.h>
+ #include <linux/moduleparam.h>
+ #include <linux/hrtimer.h>
+ #include <sound/core.h>
+ #include <sound/timer.h>
+ 
+ MODULE_AUTHOR("Takashi Iwai <tiwai@suse.de>");
+ MODULE_DESCRIPTION("ALSA hrtimer backend");
+ MODULE_LICENSE("GPL");
+ 
+ MODULE_ALIAS("snd-timer-" __stringify(SNDRV_TIMER_GLOBAL_HRTIMER));
+ 
+ #define NANO_SEC	1000000000UL	/* 10^9 in sec */
+ static unsigned int resolution;
+ 
+ struct snd_hrtimer {
+ 	struct snd_timer *timer;
+ 	struct hrtimer hrt;
+ };
+ 
+ static enum hrtimer_restart snd_hrtimer_callback(struct hrtimer *hrt)
+ {
+ 	struct snd_hrtimer *stime = container_of(hrt, struct snd_hrtimer, hrt);
+ 	struct snd_timer *t = stime->timer;
+ 	hrtimer_forward_now(hrt, ns_to_ktime(t->sticks * resolution));
+ 	snd_timer_interrupt(stime->timer, t->sticks);
+ 	return HRTIMER_RESTART;
+ }
+ 
+ static int snd_hrtimer_open(struct snd_timer *t)
+ {
+ 	struct snd_hrtimer *stime;
+ 
+ 	stime = kmalloc(sizeof(*stime), GFP_KERNEL);
+ 	if (!stime)
+ 		return -ENOMEM;
+ 	hrtimer_init(&stime->hrt, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
+ 	stime->timer = t;
 -	stime->hrt.cb_mode = HRTIMER_CB_IRQSAFE_UNLOCKED;
+ 	stime->hrt.function = snd_hrtimer_callback;
+ 	t->private_data = stime;
+ 	return 0;
+ }
+ 
+ static int snd_hrtimer_close(struct snd_timer *t)
+ {
+ 	struct snd_hrtimer *stime = t->private_data;
+ 
+ 	if (stime) {
+ 		hrtimer_cancel(&stime->hrt);
+ 		kfree(stime);
+ 		t->private_data = NULL;
+ 	}
+ 	return 0;
+ }
+ 
+ static int snd_hrtimer_start(struct snd_timer *t)
+ {
+ 	struct snd_hrtimer *stime = t->private_data;
+ 
+ 	hrtimer_start(&stime->hrt, ns_to_ktime(t->sticks * resolution),
+ 		      HRTIMER_MODE_REL);
+ 	return 0;
+ }
+ 
+ static int snd_hrtimer_stop(struct snd_timer *t)
+ {
+ 	struct snd_hrtimer *stime = t->private_data;
+ 
+ 	hrtimer_cancel(&stime->hrt);
+ 	return 0;
+ }
+ 
+ static struct snd_timer_hardware hrtimer_hw = {
+ 	.flags =	SNDRV_TIMER_HW_AUTO,
+ 	.open =		snd_hrtimer_open,
+ 	.close =	snd_hrtimer_close,
+ 	.start =	snd_hrtimer_start,
+ 	.stop =		snd_hrtimer_stop,
+ };
+ 
+ /*
+  * entry functions
+  */
+ 
+ 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) {
+ 		snd_printk(KERN_ERR
+ 			   "snd-hrtimer: Invalid resolution %u.%09u",
+ 			   (unsigned)tp.tv_sec, (unsigned)tp.tv_nsec);
+ 		return -EINVAL;
+ 	}
+ 	resolution = tp.tv_nsec;
+ 
+ 	/* Create a new timer and set up the fields */
+ 	err = snd_timer_global_new("hrtimer", SNDRV_TIMER_GLOBAL_HRTIMER,
+ 				   &timer);
+ 	if (err < 0)
+ 		return err;
+ 
+ 	timer->module = THIS_MODULE;
+ 	strcpy(timer->name, "HR timer");
+ 	timer->hw = hrtimer_hw;
+ 	timer->hw.resolution = resolution;
+ 	timer->hw.ticks = NANO_SEC / resolution;
+ 
+ 	err = snd_timer_global_register(timer);
+ 	if (err < 0) {
+ 		snd_timer_global_free(timer);
+ 		return err;
+ 	}
+ 	mytimer = timer; /* remember this */
+ 
+ 	return 0;
+ }
+ 
+ static void __exit snd_hrtimer_exit(void)
+ {
+ 	if (mytimer) {
+ 		snd_timer_global_free(mytimer);
+ 		mytimer = NULL;
+ 	}
+ }
+ 
+ module_init(snd_hrtimer_init);
+ module_exit(snd_hrtimer_exit);