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author | Linus Torvalds <torvalds@linux-foundation.org> | 2015-06-23 04:57:44 +0300 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2015-06-23 04:57:44 +0300 |
commit | 43224b96af3154cedd7220f7b90094905f07ac78 (patch) | |
tree | 44279acc4613b314ff031620fd62641db3c85b71 /sound | |
parent | d70b3ef54ceaf1c7c92209f5a662a670d04cbed9 (diff) | |
parent | 1cb6c2151850584ee805fdcf088af0bb81f4b086 (diff) | |
download | linux-43224b96af3154cedd7220f7b90094905f07ac78.tar.xz |
Merge branch 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull timer updates from Thomas Gleixner:
"A rather largish update for everything time and timer related:
- Cache footprint optimizations for both hrtimers and timer wheel
- Lower the NOHZ impact on systems which have NOHZ or timer migration
disabled at runtime.
- Optimize run time overhead of hrtimer interrupt by making the clock
offset updates smarter
- hrtimer cleanups and removal of restrictions to tackle some
problems in sched/perf
- Some more leap second tweaks
- Another round of changes addressing the 2038 problem
- First step to change the internals of clock event devices by
introducing the necessary infrastructure
- Allow constant folding for usecs/msecs_to_jiffies()
- The usual pile of clockevent/clocksource driver updates
The hrtimer changes contain updates to sched, perf and x86 as they
depend on them plus changes all over the tree to cleanup API changes
and redundant code, which got copied all over the place. The y2038
changes touch s390 to remove the last non 2038 safe code related to
boot/persistant clock"
* 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (114 commits)
clocksource: Increase dependencies of timer-stm32 to limit build wreckage
timer: Minimize nohz off overhead
timer: Reduce timer migration overhead if disabled
timer: Stats: Simplify the flags handling
timer: Replace timer base by a cpu index
timer: Use hlist for the timer wheel hash buckets
timer: Remove FIFO "guarantee"
timers: Sanitize catchup_timer_jiffies() usage
hrtimer: Allow hrtimer::function() to free the timer
seqcount: Introduce raw_write_seqcount_barrier()
seqcount: Rename write_seqcount_barrier()
hrtimer: Fix hrtimer_is_queued() hole
hrtimer: Remove HRTIMER_STATE_MIGRATE
selftest: Timers: Avoid signal deadlock in leap-a-day
timekeeping: Copy the shadow-timekeeper over the real timekeeper last
clockevents: Check state instead of mode in suspend/resume path
selftests: timers: Add leap-second timer edge testing to leap-a-day.c
ntp: Do leapsecond adjustment in adjtimex read path
time: Prevent early expiry of hrtimers[CLOCK_REALTIME] at the leap second edge
ntp: Introduce and use SECS_PER_DAY macro instead of 86400
...
Diffstat (limited to 'sound')
-rw-r--r-- | sound/core/hrtimer.c | 9 | ||||
-rw-r--r-- | sound/drivers/pcsp/pcsp.c | 17 |
2 files changed, 8 insertions, 18 deletions
diff --git a/sound/core/hrtimer.c b/sound/core/hrtimer.c index 886be7da989d..f845ecf7e172 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 d9647bd84d0f..27e25bb78c97 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); + "(%unS)\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); + printk(KERN_DEBUG "PCSP: lpj=%li, min_div=%i, res=%u\n", + loops_per_jiffy, min_div, resolution); #endif div = MAX_DIV / min_div; |