loongarch: Provide noinstr sched_clock_read()

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With the intent to provide local_clock_noinstr(), a variant of
local_clock() that's safe to be called from noinstr code (with the
assumption that any such code will already be non-preemptible),
prepare for things by providing a noinstr sched_clock_read() function.

Specifically, preempt_enable_*() calls out to schedule(), which upsets
noinstr validation efforts.

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Tested-by: Michael Kelley <mikelley@microsoft.com>  # Hyper-V
Link: https://lore.kernel.org/r/20230519102715.502547082@infradead.org

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Peter Zijlstra 2023-05-19 12:21:03 +02:00

parent 24ee7607b2

commit 6b10fef09f

2 changed files with 4 additions and 4 deletions

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2

arch/loongarch/include/asm/loongarch.h

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6

arch/loongarch/kernel/time.c

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