From: Catalin Marinas <catalin.marinas@arm.com>
To: Mark Rutland <mark.rutland@arm.com>
Cc: Kefeng Wang <wangkefeng.wang@huawei.com>,
Anshuman Khandual <anshuman.khandual@arm.com>,
Viresh Kumar <viresh.kumar@linaro.org>,
"linux-kernel@vger.kernel.org List"
<linux-kernel@vger.kernel.org>,
Mikko Perttunen <mperttunen@nvidia.com>,
Hulk Robot <hulkci@huawei.com>, Sumit Gupta <sumitg@nvidia.com>,
Will Deacon <will@kernel.org>,
linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH -next] arm64: Export __cpu_logical_map
Date: Fri, 24 Jul 2020 10:35:28 +0100 [thread overview]
Message-ID: <20200724093528.GB23388@gaia> (raw)
In-Reply-To: <20200724091308.GA44746@C02TD0UTHF1T.local>
On Fri, Jul 24, 2020 at 10:13:52AM +0100, Mark Rutland wrote:
> On Fri, Jul 24, 2020 at 01:46:18PM +0530, Anshuman Khandual wrote:
> > On 07/24/2020 08:38 AM, Kefeng Wang wrote:
> > >> Reported-by: Hulk Robot <hulkci@huawei.com>
> > >> Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com>
> > >> ---
> > >> arch/arm64/kernel/setup.c | 1 +
> > >> 1 file changed, 1 insertion(+)
> > >>
> > >> diff --git a/arch/arm64/kernel/setup.c b/arch/arm64/kernel/setup.c
> > >> index c793276ec7ad9..3aea05fbb9998 100644
> > >> --- a/arch/arm64/kernel/setup.c
> > >> +++ b/arch/arm64/kernel/setup.c
> > >> @@ -275,6 +275,7 @@ static int __init reserve_memblock_reserved_regions(void)
> > >> arch_initcall(reserve_memblock_reserved_regions);
> > >> u64 __cpu_logical_map[NR_CPUS] = { [0 ... NR_CPUS-1] = INVALID_HWID };
> > >> +EXPORT_SYMBOL(__cpu_logical_map);
>
> If modules are using cpu_logical_map(), this looks sane ot me, but I
> wonder if we should instead turn cpu_logical_map() into a C wrapper in
> smp.c, or at least mark __cpu_logical_map as __ro_after_init lest
> someone have the bright idea to fiddle with it.
I'd go for a C wrapper and also change a couple of instances where we
assign a value directly to cpu_logical_map(cpu).
--
Catalin
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next prev parent reply other threads:[~2020-07-24 9:37 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20200724030433.22287-1-wangkefeng.wang@huawei.com>
2020-07-24 3:08 ` [PATCH -next] arm64: Export __cpu_logical_map Kefeng Wang
2020-07-24 8:16 ` Anshuman Khandual
2020-07-24 9:13 ` Mark Rutland
2020-07-24 9:35 ` Catalin Marinas [this message]
2020-07-24 10:33 ` Anshuman Khandual
2020-07-24 9:16 ` Kefeng Wang
2020-07-24 9:30 ` Catalin Marinas
2020-07-24 10:36 ` Anshuman Khandual
2020-07-24 9:43 ` Christoph Hellwig
2020-07-24 13:10 ` Sudeep Holla
2020-07-25 2:00 ` Kefeng Wang
2020-07-26 11:46 ` Sumit Gupta
2020-07-27 16:05 ` Sudeep Holla
2020-08-01 12:16 ` Sumit Gupta
2020-08-10 7:49 ` Sudeep Holla
2020-08-10 10:19 ` Catalin Marinas
2020-08-10 12:11 ` Sudeep Holla
2020-08-11 19:44 ` Sumit Gupta
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