linux-kernel - Re: [PATCH 26/35] [PATCH 26/36] powerpc: Replace __get_cpu

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Date:	Sun, 17 Aug 2014 21:45:27 -0500 (CDT)
From:	Christoph Lameter <cl@...ux.com>
To:	Tejun Heo <tj@...nel.org>
cc:	akpm@...uxfoundation.org, rostedt@...dmis.org,
	linux-kernel@...r.kernel.org, Ingo Molnar <mingo@...nel.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Paul Mackerras <paulus@...ba.org>
Subject: Re: [PATCH 26/35] [PATCH 26/36] powerpc: Replace __get_cpu_var
 uses

korg tester found an issue:


From: Christoph Lameter <cl@...nux.com>
Subject: powerpc: Fix reference to opal_trace_depth.

depth is an address and not a scalar. Use & to determine the address.

Signed-off-by: Christoph Lameter <cl@...ux.com>

Index: linux/arch/powerpc/platforms/powernv/opal-tracepoints.c
===================================================================
--- linux.orig/arch/powerpc/platforms/powernv/opal-tracepoints.c
+++ linux/arch/powerpc/platforms/powernv/opal-tracepoints.c
@@ -48,7 +48,7 @@ void __trace_opal_entry(unsigned long op

 	local_irq_save(flags);

-	depth = this_cpu_ptr(opal_trace_depth);
+	depth = this_cpu_ptr(&opal_trace_depth);

 	if (*depth)
 		goto out;
@@ -69,7 +69,7 @@ void __trace_opal_exit(long opcode, unsi

 	local_irq_save(flags);

-	depth = this_cpu_ptr(opal_trace_depth);
+	depth = this_cpu_ptr(&opal_trace_depth);

 	if (*depth)
 		goto out;
--
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