From: Philippe Gerum <rpm@xenomai.org>
To: Florian Bezdeka <florian.bezdeka@siemens.com>
Cc: xenomai@lists.linux.dev, Jan Kiszka <jan.kiszka@siemens.com>
Subject: Re: [PATCH Dovetail 6.18 v2 2/4] arm64: irq_pipeline: Fix size of IPI statistics array
Date: Thu, 05 Feb 2026 18:59:44 +0100 [thread overview]
Message-ID: <87tsvv841b.fsf@xenomai.org> (raw)
In-Reply-To: <20260201-wip-flo-fixes-for-6-18-v2-2-28b30dbcfdf8@siemens.com> (Florian Bezdeka's message of "Thu, 05 Feb 2026 15:00:13 +0100")
Florian Bezdeka <florian.bezdeka@siemens.com> writes:
> NR_IPI is not the last possible IPI, it's the last traceable IPI.
> IPI_CPU_BACKTRACE and IPI_KGDB_ROUNDUP are located behind NR_IPI,
> so access to those counters were out of bounds.
>
> Signed-off-by: Florian Bezdeka <florian.bezdeka@siemens.com>
> ---
> arch/arm64/kernel/smp.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/arch/arm64/kernel/smp.c b/arch/arm64/kernel/smp.c
> index 52e9d29083fc1..8d3791ed39e69 100644
> --- a/arch/arm64/kernel/smp.c
> +++ b/arch/arm64/kernel/smp.c
> @@ -1054,7 +1054,7 @@ static void __smp_cross_call(const struct cpumask *target, unsigned int ipinr)
>
> static DEFINE_PER_CPU(unsigned long, ipi_messages);
>
> -static DEFINE_PER_CPU(unsigned int [NR_IPI], ipi_counts);
> +static DEFINE_PER_CPU(unsigned int [MAX_IPI], ipi_counts);
>
> static irqreturn_t ipi_handler(int irq, void *data)
> {
Ack.
--
Philippe.
next prev parent reply other threads:[~2026-02-05 18:09 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-02-05 14:00 [PATCH Dovetail 6.18 v2 0/4] Fix IPI mapping for arm64 Florian Bezdeka
2026-02-05 14:00 ` [PATCH Dovetail 6.18 v2 1/4] arm64: irq_pipeline: Fix mapping of IPIs in LPI mode Florian Bezdeka
2026-02-05 17:59 ` Philippe Gerum
2026-02-05 14:00 ` [PATCH Dovetail 6.18 v2 2/4] arm64: irq_pipeline: Fix size of IPI statistics array Florian Bezdeka
2026-02-05 17:59 ` Philippe Gerum [this message]
2026-02-05 14:00 ` [PATCH Dovetail 6.18 v2 3/4] arm64: irq_pipeline: Fix IPI_KGDB_ROUNDUP and IPI_CPU_BACKTRACE IPIs Florian Bezdeka
2026-02-05 18:53 ` Philippe Gerum
2026-02-05 14:00 ` [PATCH Dovetail 6.18 v2 4/4] arm64: irq_pipeline: Fix tracepoint for multiplexed IPIs Florian Bezdeka
2026-02-05 19:03 ` Philippe Gerum
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