linux-kernel - [PATCH 5.5 254/257] perf/core: Remove struct sched_in

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Date:   Thu, 16 Apr 2020 15:25:05 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        "Peter Zijlstra (Intel)" <peterz@...radead.org>,
        Ingo Molnar <mingo@...nel.org>, Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.5 254/257] perf/core: Remove struct sched_in_data

From: Peter Zijlstra <peterz@...radead.org>

[ Upstream commit 2c2366c7548ecee65adfd264517ddf50f9e2d029 ]

We can deduce the ctx and cpuctx from the event, no need to pass them
along. Remove the structure and pass in can_add_hw directly.

Signed-off-by: Peter Zijlstra (Intel) <peterz@...radead.org>
Signed-off-by: Ingo Molnar <mingo@...nel.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 kernel/events/core.c | 36 +++++++++++-------------------------
 1 file changed, 11 insertions(+), 25 deletions(-)

diff --git a/kernel/events/core.c b/kernel/events/core.c
index 8d8e52a0922f4..78068b57cbba2 100644
--- a/kernel/events/core.c
+++ b/kernel/events/core.c
@@ -3437,17 +3437,11 @@ static int visit_groups_merge(struct perf_event_groups *groups, int cpu,
 	return 0;
 }
 
-struct sched_in_data {
-	struct perf_event_context *ctx;
-	struct perf_cpu_context *cpuctx;
-	int can_add_hw;
-};
-
 static int merge_sched_in(struct perf_event *event, void *data)
 {
-	struct sched_in_data *sid = data;
-
-	WARN_ON_ONCE(event->ctx != sid->ctx);
+	struct perf_event_context *ctx = event->ctx;
+	struct perf_cpu_context *cpuctx = __get_cpu_context(ctx);
+	int *can_add_hw = data;
 
 	if (event->state <= PERF_EVENT_STATE_OFF)
 		return 0;
@@ -3455,8 +3449,8 @@ static int merge_sched_in(struct perf_event *event, void *data)
 	if (!event_filter_match(event))
 		return 0;
 
-	if (group_can_go_on(event, sid->cpuctx, sid->can_add_hw)) {
-		if (!group_sched_in(event, sid->cpuctx, sid->ctx))
+	if (group_can_go_on(event, cpuctx, *can_add_hw)) {
+		if (!group_sched_in(event, cpuctx, ctx))
 			list_add_tail(&event->active_list, get_event_list(event));
 	}
 
@@ -3466,8 +3460,8 @@ static int merge_sched_in(struct perf_event *event, void *data)
 			perf_event_set_state(event, PERF_EVENT_STATE_ERROR);
 		}
 
-		sid->can_add_hw = 0;
-		sid->ctx->rotate_necessary = 1;
+		*can_add_hw = 0;
+		ctx->rotate_necessary = 1;
 	}
 
 	return 0;
@@ -3477,30 +3471,22 @@ static void
 ctx_pinned_sched_in(struct perf_event_context *ctx,
 		    struct perf_cpu_context *cpuctx)
 {
-	struct sched_in_data sid = {
-		.ctx = ctx,
-		.cpuctx = cpuctx,
-		.can_add_hw = 1,
-	};
+	int can_add_hw = 1;
 
 	visit_groups_merge(&ctx->pinned_groups,
 			   smp_processor_id(),
-			   merge_sched_in, &sid);
+			   merge_sched_in, &can_add_hw);
 }
 
 static void
 ctx_flexible_sched_in(struct perf_event_context *ctx,
 		      struct perf_cpu_context *cpuctx)
 {
-	struct sched_in_data sid = {
-		.ctx = ctx,
-		.cpuctx = cpuctx,
-		.can_add_hw = 1,
-	};
+	int can_add_hw = 1;
 
 	visit_groups_merge(&ctx->flexible_groups,
 			   smp_processor_id(),
-			   merge_sched_in, &sid);
+			   merge_sched_in, &can_add_hw);
 }
 
 static void
-- 
2.20.1