From 8a1f4653f27ffd5d61088cf6b95c39bb13bf6132 Mon Sep 17 00:00:00 2001 From: Ingo Molnar Date: Tue, 24 Sep 2013 09:52:40 +0200 Subject: [PATCH] x86/UV: Check for alloc_cpumask_var() failures properly in uv_nmi_setup() MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit GCC warned about: arch/x86/platform/uv/uv_nmi.c: In function ‘uv_nmi_setup’: arch/x86/platform/uv/uv_nmi.c:664:2: warning: the address of ‘uv_nmi_cpu_mask’ will always evaluate as ‘true’ The reason is this code: alloc_cpumask_var(&uv_nmi_cpu_mask, GFP_KERNEL); BUG_ON(!uv_nmi_cpu_mask); which is not the way to check for alloc_cpumask_var() failures - its return code should be checked instead. Cc: Mike Travis Link: http://lkml.kernel.org/n/tip-2pXRemsjupmvonbpmmnzleo1@git.kernel.org Signed-off-by: Ingo Molnar --- arch/x86/platform/uv/uv_nmi.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/arch/x86/platform/uv/uv_nmi.c b/arch/x86/platform/uv/uv_nmi.c index c171ca533156..9126dfb6dbfc 100644 --- a/arch/x86/platform/uv/uv_nmi.c +++ b/arch/x86/platform/uv/uv_nmi.c @@ -660,8 +660,7 @@ void uv_nmi_setup(void) } uv_hub_nmi_per(cpu) = uv_hub_nmi_list[nid]; } - alloc_cpumask_var(&uv_nmi_cpu_mask, GFP_KERNEL); - BUG_ON(!uv_nmi_cpu_mask); + BUG_ON(!alloc_cpumask_var(&uv_nmi_cpu_mask, GFP_KERNEL)); }