lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
Open Source and information security mailing list archives
| ||
|
Date: Thu, 16 Apr 2015 10:07:15 +0200 From: Takashi Iwai <tiwai@...e.de> To: Thomas Gleixner <tglx@...utronix.de> Cc: LKML <linux-kernel@...r.kernel.org>, Peter Zijlstra <peterz@...radead.org>, Ingo Molnar <mingo@...nel.org>, Preeti U Murthy <preeti@...ux.vnet.ibm.com>, Viresh Kumar <viresh.kumar@...aro.org>, Marcelo Tosatti <mtosatt@...hat.com>, Frederic Weisbecker <fweisbec@...il.com>, Jaroslav Kysela <perex@...ex.cz>, alsa-devel@...a-project.org Subject: Re: [patch 04/39] sound: Use hrtimer_resolution instead of hrtimer_get_res() At Tue, 14 Apr 2015 21:08:30 -0000, Thomas Gleixner wrote: > > 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> > Cc: Jaroslav Kysela <perex@...ex.cz> > Cc: Takashi Iwai <tiwai@...e.de> Would you like me picking up this through sound git tree, or apply the whole set through tip? In the latter case, feel free to take my ack: Acked-by: Takashi Iwai <tiwai@...e.de> thanks, Takashi > Cc: alsa-devel@...a-project.org > --- > sound/core/hrtimer.c | 9 +-------- > sound/drivers/pcsp/pcsp.c | 15 ++++++--------- > 2 files changed, 7 insertions(+), 17 deletions(-) > > Index: tip/sound/core/hrtimer.c > =================================================================== > --- tip.orig/sound/core/hrtimer.c > +++ tip/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, > Index: tip/sound/drivers/pcsp/pcsp.c > =================================================================== > --- tip.orig/sound/drivers/pcsp/pcsp.c > +++ tip/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_ca > } > } > > - 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; > > -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists