linux-kernel - [bug] perf_event_intel_uncore.c build warnings on allnoconfig

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Message-ID: <20121024072901.GA25890@gmail.com>
Date:	Wed, 24 Oct 2012 09:29:01 +0200
From:	Ingo Molnar <mingo@...nel.org>
To:	Yan@...il.com, Zheng <zheng.z.yan@...el.com>
Cc:	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	linux-kernel@...r.kernel.org
Subject: [bug] perf_event_intel_uncore.c build warnings on allnoconfig


FYI, on a 'make allnoconfig' x86_64 kernel I get a stream of 
warnings:

 arch/x86/kernel/cpu/perf_event_intel_uncore.c: In function ‘snbep_uncore_pci_disable_box’:
 arch/x86/kernel/cpu/perf_event_intel_uncore.c:124:9: warning: ‘config’ is used uninitialized in this function [-Wuninitialized]
 arch/x86/kernel/cpu/perf_event_intel_uncore.c: In function ‘snbep_uncore_pci_enable_box’:
 arch/x86/kernel/cpu/perf_event_intel_uncore.c:135:9: warning: ‘config’ is used uninitialized in this function [-Wuninitialized]
 arch/x86/kernel/cpu/perf_event_intel_uncore.c: In function ‘snbep_uncore_pci_read_counter’:
 arch/x86/kernel/cpu/perf_event_intel_uncore.c:164:2: warning: ‘count’ is used uninitialized in this function [-Wuninitialized]

Please fix this - if pci_read_config_dword() returns an error it 
should be handled - that will fix these warnings as well.

Thanks,

	Ingo
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