The clang warning -Wshorten-64-to-32 can be useful to catch
inadvertent truncation. In some instances this truncation can lead to
changing the sign of a result, for example, truncation to return an
int to fit a sort routine. Silence the warning by making the implicit
truncation explicit.

Signed-off-by: Ian Rogers <irogers@google.com>
---
 tools/perf/builtin-kwork.c      | 11 +++++------
 tools/perf/util/bpf_kwork_top.c |  2 +-
 2 files changed, 6 insertions(+), 7 deletions(-)

diff --git a/tools/perf/builtin-kwork.c b/tools/perf/builtin-kwork.c
index c41a68d073de..cc5488cb98e4 100644
--- a/tools/perf/builtin-kwork.c
+++ b/tools/perf/builtin-kwork.c
@@ -1574,8 +1574,7 @@ static void top_print_per_cpu_load(struct perf_kwork *kwork)
 		load = stat->cpus_runtime[i].load;
 		if (test_bit(i, stat->all_cpus_bitmap) && total) {
 			load_ratio = load * 10000 / total;
-			load_width = PRINT_CPU_USAGE_HIST_WIDTH *
-				load_ratio / 10000;
+			load_width = (int)(PRINT_CPU_USAGE_HIST_WIDTH * load_ratio / 10000);
 
 			printf("%%Cpu%-*d[%.*s%.*s %*.*f%%]\n",
 			       PRINT_CPU_WIDTH, i,
@@ -1595,7 +1594,7 @@ static void top_print_cpu_usage(struct perf_kwork *kwork)
 	u64 idle_time = stat->cpus_runtime[MAX_NR_CPUS].idle;
 	u64 hardirq_time = stat->cpus_runtime[MAX_NR_CPUS].irq;
 	u64 softirq_time = stat->cpus_runtime[MAX_NR_CPUS].softirq;
-	int cpus_nr = bitmap_weight(stat->all_cpus_bitmap, MAX_NR_CPUS);
+	int cpus_nr = (int)bitmap_weight(stat->all_cpus_bitmap, MAX_NR_CPUS);
 	u64 cpus_total_time = stat->cpus_runtime[MAX_NR_CPUS].total;
 
 	printf("Total  : %*.*f ms, %d cpus\n",
@@ -1801,7 +1800,7 @@ static int perf_kwork__read_events(struct perf_kwork *kwork)
 	session = perf_session__new(&data, &kwork->tool);
 	if (IS_ERR(session)) {
 		pr_debug("Error creating perf session\n");
-		return PTR_ERR(session);
+		return (int)PTR_ERR(session);
 	}
 
 	symbol__init(&session->header.env);
@@ -2088,8 +2087,8 @@ static void top_calc_cpu_usage(struct perf_kwork *kwork)
 
 		top_subtract_irq_runtime(kwork, work);
 
-		work->cpu_usage = work->total_runtime * 10000 /
-			stat->cpus_runtime[work->cpu].total;
+		work->cpu_usage = (u32)(work->total_runtime *
+					10000 / stat->cpus_runtime[work->cpu].total);
 
 		top_calc_idle_time(kwork, work);
 next:
diff --git a/tools/perf/util/bpf_kwork_top.c b/tools/perf/util/bpf_kwork_top.c
index b6f187dd9136..808d0c84d26d 100644
--- a/tools/perf/util/bpf_kwork_top.c
+++ b/tools/perf/util/bpf_kwork_top.c
@@ -219,7 +219,7 @@ static void read_task_info(struct kwork_work *work)
 	int fd;
 	struct task_data data;
 	struct task_key key = {
-		.pid = work->id,
+		.pid = (__u32)work->id,
 		.cpu = work->cpu,
 	};
 
-- 
2.49.0.504.g3bcea36a83-goog