[PATCH v1 41/48] perf kvm: Silence -Wshorten-64-to-32 warnings

[Ian Rogers]

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@xxxxxxxxxx>
---
 tools/perf/builtin-kvm.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/tools/perf/builtin-kvm.c b/tools/perf/builtin-kvm.c
index 67fd2b006b0b..a81874b7f2d3 100644
--- a/tools/perf/builtin-kvm.c
+++ b/tools/perf/builtin-kvm.c
@@ -928,7 +928,7 @@ struct vcpu_event_record *per_vcpu_record(struct thread *thread,
 			return NULL;
 		}
 
-		vcpu_record->vcpu_id = evsel__intval(evsel, sample, vcpu_id_str);
+		vcpu_record->vcpu_id = (int)evsel__intval(evsel, sample, vcpu_id_str);
 		thread__set_priv(thread, vcpu_record);
 	}
 
@@ -1337,7 +1337,7 @@ static int perf_kvm__handle_timerfd(struct perf_kvm_stat *kvm)
 	uint64_t c;
 	int rc;
 
-	rc = read(kvm->timerfd, &c, sizeof(uint64_t));
+	rc = (int)read(kvm->timerfd, &c, sizeof(uint64_t));
 	if (rc < 0) {
 		if (errno == EAGAIN)
 			return 0;
@@ -1558,7 +1558,7 @@ static int read_events(struct perf_kvm_stat *kvm)
 	kvm->session = perf_session__new(&file, &kvm->tool);
 	if (IS_ERR(kvm->session)) {
 		pr_err("Initializing perf session failed\n");
-		return PTR_ERR(kvm->session);
+		return (int)PTR_ERR(kvm->session);
 	}
 
 	symbol__init(&kvm->session->header.env);
@@ -1924,7 +1924,7 @@ static int kvm_events_live(struct perf_kvm_stat *kvm,
 	 */
 	kvm->session = perf_session__new(&data, &kvm->tool);
 	if (IS_ERR(kvm->session)) {
-		err = PTR_ERR(kvm->session);
+		err = (int)PTR_ERR(kvm->session);
 		goto out;
 	}
 	kvm->session->evlist = kvm->evlist;
-- 
2.49.0.504.g3bcea36a83-goog