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hrtimer: create hrtimer_quiesce_cpu() to isolate CPU from hrtimers

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To isolate CPUs (isolate from hrtimers) from sysfs using cpusets, we need some
support from the hrtimer core. i.e. A routine hrtimer_quiesce_cpu() which would
migrate away all the unpinned hrtimers, but shouldn't touch the pinned ones.

This patch creates this routine.

Change-Id: Icf93622bdeed9c6c28eb1aca1637bc5b9522a533
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
[forward port to 3.18]
Signed-off-by: Santosh Shukla <santosh.shukla@linaro.org>
[ohaugan@codeaurora.org: Port to 4.4]
Git-commit: d4d50a0ddc35e58ee95137ba4d14e74fea8b682f
Git-repo: git://git.linaro.org/people/mike.holmes/santosh.shukla/lng-isol.git
Signed-off-by: Olav Haugan <ohaugan@codeaurora.org>
[rameezmustafa@codeaurora.org: Port to msm-4.9]
Signed-off-by: Syed Rameez Mustafa <rameezmustafa@codeaurora.org>
[satyap@codeaurora.org: Port to msm-4.19 and fix merge conflicts]
Signed-off-by: Satya Durga Srinivasu Prabhala <satyap@codeaurora.org>
This commit is contained in:
Viresh Kumar
2015-03-25 12:07:31 +05:30
committed by Satya Durga Srinivasu Prabhala
parent e2e45baa03
commit a13bd9b940
2 changed files with 47 additions and 11 deletions
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3
include/linux/hrtimer.h
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@@ -374,6 +374,9 @@ static inline void hrtimer_cancel_wait_running(struct hrtimer *timer)
/* Exported timer functions: */
/* To be used from cpusets, only */
extern void hrtimer_quiesce_cpu(void *cpup);
/* Initialize timers: */
extern void hrtimer_init(struct hrtimer *timer, clockid_t which_clock,
enum hrtimer_mode mode);