From: Ralf Baechle <ralf@linux-mips.org>
To: Hillf Danton <dhillf@gmail.com>
Cc: "Jayachandran C." <jayachandranc@netlogicmicro.com>,
linux-mips@linux-mips.org
Subject: Re: [RFC] mark Netlogic XLR chip as SMT capable
Date: Mon, 3 Oct 2011 11:32:04 +0100 [thread overview]
Message-ID: <20111003103204.GC6038@linux-mips.org> (raw)
In-Reply-To: <CAJd=RBBt0xNgUrz9XnU0TcHo443t3j323zYg8jMPYRjXsV=EHw@mail.gmail.com>
On Mon, Oct 03, 2011 at 01:46:46PM +0800, Hillf Danton wrote:
> + unsigned int cpu, core_id;
> +
> + cpu = smp_processor_id();
> + core_id = (cpu >> 2) & 0x7;
> + cpu_data[cpu].core = core_id;
This is going to break in setups where Linux is not being booted on
what the hardware considers CPU core 0. Which is not uncommon in embedded
setups. You may want to probe the hardware for the core ID rather than
relying on smp_processor_id() here.
Ralf
next prev parent reply other threads:[~2011-10-03 10:32 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-10-02 7:26 [RFC] mark Netlogic XLR chip as SMT capable Hillf Danton
2011-10-02 8:30 ` Jayachandran C.
2011-10-02 8:30 ` Jayachandran C.
2011-10-03 5:46 ` Hillf Danton
2011-10-03 10:32 ` Ralf Baechle [this message]
2011-10-03 10:39 ` Jayachandran C.
2011-10-03 10:39 ` Jayachandran C.
2011-10-04 10:48 ` Hillf Danton
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