linux-kernel - [PATCH v2 04/10] powerpc/hv-24x7: Drop event_24x7

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Message-Id: <1427766828-771-5-git-send-email-sukadev@linux.vnet.ibm.com>
Date:	Mon, 30 Mar 2015 18:53:41 -0700
From:	Sukadev Bhattiprolu <sukadev@...ux.vnet.ibm.com>
To:	Michael Ellerman <mpe@...erman.id.au>,
	Paul Mackerras <paulus@...ba.org>, peterz@...radead.org
Cc:	dev@...yps.com, <linux-kernel@...r.kernel.org>,
	linuxppc-dev@...ts.ozlabs.org
Subject: [PATCH v2 04/10] powerpc/hv-24x7: Drop event_24x7_request()

The function event_24x7_request() is essentially a wrapper to the
function single_24x7_request() and can be dropped to simplify code.

Changelog [v2]:
	- Michael Ellerman: Use fields from the request structure rather
		than re-extracting from event structure.

Signed-off-by: Sukadev Bhattiprolu <sukadev@...ux.vnet.ibm.com>
---
 arch/powerpc/perf/hv-24x7.c | 40 +++++++++++++++-------------------------
 1 file changed, 15 insertions(+), 25 deletions(-)

diff --git a/arch/powerpc/perf/hv-24x7.c b/arch/powerpc/perf/hv-24x7.c
index 87c9905..f509f3b 100644
--- a/arch/powerpc/perf/hv-24x7.c
+++ b/arch/powerpc/perf/hv-24x7.c
@@ -985,9 +985,9 @@ static const struct attribute_group *attr_groups[] = {
 	NULL,
 };
 
-static unsigned long single_24x7_request(u8 domain, u32 offset, u16 ix,
-					 u16 lpar, u64 *count)
+static unsigned long single_24x7_request(struct perf_event *event, u64 *count)
 {
+	u16 idx;
 	unsigned long ret;
 
 	struct hv_24x7_request_buffer *request_buffer;
@@ -1004,17 +1004,22 @@ static unsigned long single_24x7_request(u8 domain, u32 offset, u16 ix,
 	memset(request_buffer, 0, 4096);
 	memset(result_buffer, 0, 4096);
 
+	if (is_physical_domain(event_get_domain(event)))
+		idx = event_get_core(event);
+	else
+		idx = event_get_vcpu(event);
+
 	request_buffer->interface_version = HV_24X7_IF_VERSION_CURRENT;
 	request_buffer->num_requests = 1;
 
 	req = &request_buffer->requests[0];
 
-	req->performance_domain = domain;
+	req->performance_domain = event_get_domain(event);
 	req->data_size = cpu_to_be16(8);
-	req->data_offset = cpu_to_be32(offset);
-	req->starting_lpar_ix = cpu_to_be16(lpar),
+	req->data_offset = cpu_to_be32(event_get_offset(event));
+	req->starting_lpar_ix = cpu_to_be16(event_get_lpar(event)),
 	req->max_num_lpars = cpu_to_be16(1);
-	req->starting_ix = cpu_to_be16(ix);
+	req->starting_ix = cpu_to_be16(idx);
 	req->max_ix = cpu_to_be16(1);
 
 	/*
@@ -1029,7 +1034,8 @@ static unsigned long single_24x7_request(u8 domain, u32 offset, u16 ix,
 	if (ret) {
 		pr_devel_ratelimited("hcall failed: %d %#x %#x %d => "
 				"0x%lx (%ld) detail=0x%x failing ix=%x\n",
-				domain, offset, ix, lpar, ret, ret,
+				req->performance_domain, req->data_offset,
+				idx, req->starting_lpar_ix, ret, ret,
 				result_buffer->detailed_rc,
 				result_buffer->failing_request_ix);
 		goto out;
@@ -1042,22 +1048,6 @@ out:
 	return ret;
 }
 
-static unsigned long event_24x7_request(struct perf_event *event, u64 *res)
-{
-	u16 idx;
-	unsigned domain = event_get_domain(event);
-
-	if (is_physical_domain(domain))
-		idx = event_get_core(event);
-	else
-		idx = event_get_vcpu(event);
-
-	return single_24x7_request(event_get_domain(event),
-				event_get_offset(event),
-				idx,
-				event_get_lpar(event),
-				res);
-}
 
 static int h_24x7_event_init(struct perf_event *event)
 {
@@ -1126,7 +1116,7 @@ static int h_24x7_event_init(struct perf_event *event)
 	}
 
 	/* see if the event complains */
-	if (event_24x7_request(event, &ct)) {
+	if (single_24x7_request(event, &ct)) {
 		pr_devel("test hcall failed\n");
 		return -EIO;
 	}
@@ -1138,7 +1128,7 @@ static u64 h_24x7_get_value(struct perf_event *event)
 {
 	unsigned long ret;
 	u64 ct;
-	ret = event_24x7_request(event, &ct);
+	ret = single_24x7_request(event, &ct);
 	if (ret)
 		/* We checked this in event init, shouldn't fail here... */
 		return 0;
-- 
1.8.3.1

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