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Date: Wed, 24 Oct 2012 10:24:41 -0700 From: Andi Kleen <andi@...stfloor.org> To: Ingo Molnar <mingo@...nel.org> Cc: Zheng <zheng.z.yan@...el.com>, Peter Zijlstra <a.p.zijlstra@...llo.nl>, linux-kernel@...r.kernel.org Subject: Re: [bug] perf_event_intel_uncore.c build warnings on allnoconfig Ingo Molnar <mingo@...nel.org> writes: > 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. Can it even return an error on x86? I don't know of any existing mechanism for this, short of a machine check. -Andi -- ak@...ux.intel.com -- Speaking for myself only -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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