linux-kernel - [PATCH v3 2/8] powerpc/perf/hv-24x7: Simplify extracting counter from result buffer

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Date:	Tue, 14 Jul 2015 20:01:49 -0700
From:	Sukadev Bhattiprolu <sukadev@...ux.vnet.ibm.com>
To:	Peter Zijlstra <peterz@...radead.org>,
	Ingo Molnar <mingo@...hat.com>,
	Arnaldo Carvalho de Melo <acme@...nel.org>,
	Michael Ellerman <mpe@...erman.id.au>
Cc:	<linux-kernel@...r.kernel.org>, linuxppc-dev@...ts.ozlabs.org,
	linux-s390@...r.kernel.org, sparclinux@...r.kernel.org
Subject: [PATCH v3 2/8] powerpc/perf/hv-24x7: Simplify extracting counter from result buffer

Simplify code that extracts a 24x7 counter from the HCALL's result buffer.

Suggested-by: Joe Perches <joe@...ches.com>
Signed-off-by: Sukadev Bhattiprolu <sukadev@...ux.vnet.ibm.com>
---
 arch/powerpc/perf/hv-24x7.c |    6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/arch/powerpc/perf/hv-24x7.c b/arch/powerpc/perf/hv-24x7.c
index 9d73c69..4d1a8d1 100644
--- a/arch/powerpc/perf/hv-24x7.c
+++ b/arch/powerpc/perf/hv-24x7.c
@@ -1104,7 +1104,7 @@ static unsigned long single_24x7_request(struct perf_event *event, u64 *count)
 	unsigned long ret;
 	struct hv_24x7_request_buffer *request_buffer;
 	struct hv_24x7_data_result_buffer *result_buffer;
-	struct hv_24x7_result *resb;
+	__be64 val;
 
 	BUILD_BUG_ON(sizeof(*request_buffer) > 4096);
 	BUILD_BUG_ON(sizeof(*result_buffer) > 4096);
@@ -1125,8 +1125,8 @@ static unsigned long single_24x7_request(struct perf_event *event, u64 *count)
 	}
 
 	/* process result from hcall */
-	resb = &result_buffer->results[0];
-	*count = be64_to_cpu(resb->elements[0].element_data[0]);
+	val = result_buffer->results[0].elements[0].element_data[0];
+	*count = be64_to_cpu(val);
 
 out:
 	put_cpu_var(hv_24x7_reqb);
-- 
1.7.9.5

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