posix-timers: Handle the timer_[re]arm() return value

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The [re]arm callbacks will return true when the timer was queued and false
if it was already expired at enqueue time.

In both cases the call sites can trivially queue the signal right there,
when the timer was already expired. That avoids a full round trip through
the hrtimer interrupt.

Signed-off-by: Thomas Gleixner <tglx@kernel.org>
Reviewed-by: Frederic Weisbecker <frederic@kernel.org>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://patch.msgid.link/20260408114952.198028466@kernel.org

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Thomas Gleixner 2026-04-08 13:54:01 +02:00

parent 6fdb2677a5

commit cfb7fe3fdd

1 changed files with 17 additions and 5 deletions

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kernel/time/posix-timers.c

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