arm64: abort counter_read_on_cpu() when irqs_disabled()

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Given that smp_call_function_single() can deadlock when interrupts are
disabled, abort the SMP call if irqs_disabled(). This scenario is
currently not possible given the function's uses, but safeguard this for
potential future uses.

Signed-off-by: Ionela Voinescu <ionela.voinescu@arm.com>
Cc: Will Deacon <will@kernel.org>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Link: https://lore.kernel.org/r/20201113155328.4194-1-ionela.voinescu@arm.com
[catalin.marinas@arm.com: modified following Mark's comment]
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>

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Ionela Voinescu 2020-11-13 15:53:28 +00:00 • committed by Catalin Marinas

parent 68c5debcc0

commit 7449042252

1 changed files with 7 additions and 0 deletions

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arch/arm64/kernel/topology.c

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