linux-kernel - [PATCH] perf/x86/intel/pt: Fix a refactoring glitch

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Date:	Thu,  4 Jun 2015 16:31:47 +0300
From:	Alexander Shishkin <alexander.shishkin@...ux.intel.com>
To:	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Ingo Molnar <mingo@...hat.com>
Cc:	linux-kernel@...r.kernel.org, Paul Mackerras <paulus@...ba.org>,
	adrian.hunter@...el.com, x86@...nel.org, hpa@...or.com,
	acme@...radead.org,
	Alexander Shishkin <alexander.shishkin@...ux.intel.com>
Subject: [PATCH] perf/x86/intel/pt: Fix a refactoring glitch

Commit 066450be41 ("perf/x86/intel/pt: Clean up the control flow in
pt_pmu_hw_init()") changed attribute initialization so that only the
first attribute gets initialized using sysfs_attr_init(), which upsets
lockdep.

This patch fixes the glitch so that all allocated attributes are properly
initialized thus fixing the lockdep warning reported by Tvrtko and Imre.

Signed-off-by: Alexander Shishkin <alexander.shishkin@...ux.intel.com>
Reported-by: Tvrtko Ursulin <tvrtko.ursulin@...ux.intel.com>
Reported-by: Imre Deak <imre.deak@...el.com>
---
 arch/x86/kernel/cpu/perf_event_intel_pt.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/kernel/cpu/perf_event_intel_pt.c b/arch/x86/kernel/cpu/perf_event_intel_pt.c
index ccdda1311e..7ef69b2c46 100644
--- a/arch/x86/kernel/cpu/perf_event_intel_pt.c
+++ b/arch/x86/kernel/cpu/perf_event_intel_pt.c
@@ -197,7 +197,7 @@ static int __init pt_pmu_hw_init(void)
 
 		de_attr->attr.attr.name = pt_caps[i].name;
 
-		sysfs_attr_init(&de_attrs->attr.attr);
+		sysfs_attr_init(&de_attr->attr.attr);
 
 		de_attr->attr.attr.mode		= S_IRUGO | S_IWUSR;
 		de_attr->attr.store		= pt_cap_store;
-- 
2.1.4

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