Date: Tue, 21 Jan 2014 21:00:49 -0500
From: "Chen, Gong" <gong.chen@linux.intel.com>
To: Prarit Bhargava <prarit@redhat.com>
Cc: linux-kernel@vger.kernel.org, Andi Kleen <ak@linux.intel.com>,
        Michel Lespinasse <walken@google.com>,
        Seiji Aguchi <seiji.aguchi@hds.com>,
        Yang Zhang <yang.z.zhang@Intel.com>,
        Paul Gortmaker <paul.gortmaker@windriver.com>,
        Janet Morgan <janet.morgan@Intel.com>, Tony Luck <tony.luck@Intel.com>,
        Ruiv Wang <ruiv.wang@gmail.com>,
        "H. Peter Anvin" <hpa@linux.intel.com>, x86@kernel.org,
        Fengguang Wu <fengguang.wu@Intel.com>
Subject: Re: [PATCH] x86, cpu hotplug, use cpumask stack safe variant
 cpumask_var_t in check_irq_vectors_for_cpu_disable() [v2]
Message-ID: <20140122020049.GA16393@gchen.bj.intel.com>
References: <20140120085017.GB5243@gchen.bj.intel.com>
 <1390244278-30024-1-git-send-email-prarit@redhat.com>
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On Mon, Jan 20, 2014 at 01:57:58PM -0500, Prarit Bhargava wrote:
> Subject: [PATCH] x86, cpu hotplug, use cpumask stack safe variant
>  cpumask_var_t in check_irq_vectors_for_cpu_disable() [v2]
>=20
> kbuild, 0day kernel build service, outputs the warning:
>=20
> arch/x86/kernel/irq.c:333:1: warning: the frame size of 2056 bytes
> is larger than 2048 bytes [-Wframe-larger-than=3D]
>=20
> because check_irq_vectors_for_cpu_disable() allocates two cpumasks on the
> stack.  Fix this by using cpumask_var_t, the cpumask stack safe variant.
>=20
> Signed-off-by: Prarit Bhargava <prarit@redhat.com>
> Cc: Andi Kleen <ak@linux.intel.com>
> Cc: Michel Lespinasse <walken@google.com>
> Cc: Seiji Aguchi <seiji.aguchi@hds.com>
> Cc: Yang Zhang <yang.z.zhang@Intel.com>
> Cc: Paul Gortmaker <paul.gortmaker@windriver.com>
> Cc: Janet Morgan <janet.morgan@intel.com>
> Cc: Tony Luck <tony.luck@intel.com>
> Cc: Ruiv Wang <ruiv.wang@gmail.com>
> Cc: Gong Chen <gong.chen@linux.intel.com>
> Cc: H. Peter Anvin <hpa@linux.intel.com>
> Cc: Gong Chen <gong.chen@linux.intel.com>
> Cc: x86@kernel.org
> Cc: Fengguang Wu <fengguang.wu@intel.com>
>=20
> [v2]: switch from GFP_KERNEL to GFP_ATOMIC

Reviewed-by: Chen, Gong <gong.chen@linux.intel.com>


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