posix_cpu_timers: consolidate timer list cleanups
Cleaning up the posix cpu timers on task exit shares some common code among timer list types, most notably the list traversal and expiry time update. Unify this in a common helper. Signed-off-by: NFrederic Weisbecker <fweisbec@gmail.com> Cc: Stanislaw Gruszka <sgruszka@redhat.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Ingo Molnar <mingo@elte.hu> Cc: Oleg Nesterov <oleg@redhat.com> Cc: KOSAKI Motohiro <kosaki.motohiro@gmail.com> Cc: Olivier Langlois <olivier@trillion01.com> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
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