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From: Ian Rogers <irogers@google.com>
To: "Peter Zijlstra" <peterz@infradead.org>,
	"Ingo Molnar" <mingo@redhat.com>,
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Cc: Ian Rogers <irogers@google.com>
Subject: [PATCH v2 06/47] x86/insn: Silence -Wshorten-64-to-32 warnings
Date: Wed, 30 Apr 2025 10:49:54 -0700	[thread overview]
Message-ID: <20250430175036.184610-7-irogers@google.com> (raw)
In-Reply-To: <20250430175036.184610-1-irogers@google.com>

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/arch/x86/lib/insn.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/arch/x86/lib/insn.c b/tools/arch/x86/lib/insn.c
index e91d4c4e1c16..5fa8697498fe 100644
--- a/tools/arch/x86/lib/insn.c
+++ b/tools/arch/x86/lib/insn.c
@@ -92,7 +92,7 @@ static int __insn_get_emulate_prefix(struct insn *insn,
 			goto err_out;
 	}
 
-	insn->emulate_prefix_size = len;
+	insn->emulate_prefix_size = (int)len;
 	insn->next_byte += len;
 
 	return 1;
-- 
2.49.0.906.g1f30a19c02-goog


  parent reply	other threads:[~2025-04-30 17:51 UTC|newest]

Thread overview: 58+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2025-04-30 17:49 [PATCH v2 00/47] Perf build support for -Wshorten-64-to-32 Ian Rogers
2025-04-30 17:49 ` [PATCH v2 01/47] perf build: Avoid building libbpf/bpftool with LIBBPF_DYNAMIC Ian Rogers
2025-04-30 17:49 ` [PATCH v2 02/47] perf tests: Silence -Wshorten-64-to-32 warnings Ian Rogers
2025-04-30 17:49 ` [PATCH v2 03/47] perf ui: " Ian Rogers
2025-04-30 17:49 ` [PATCH v2 04/47] perf bench: " Ian Rogers
2025-04-30 20:23   ` Dirk Gouders
2025-04-30 21:04     ` Ian Rogers
2025-04-30 22:18       ` Dirk Gouders
2025-04-30 22:22         ` Ian Rogers
2025-04-30 23:11           ` Dirk Gouders
2025-05-02 12:06             ` David Laight
2025-05-02 14:12               ` Dirk Gouders
2025-05-03 10:05                 ` David Laight
2025-05-03 12:22                   ` Dirk Gouders
2025-04-30 17:49 ` [PATCH v2 05/47] arm64: cputype: " Ian Rogers
2025-05-09 12:56   ` Mark Rutland
2025-04-30 17:49 ` Ian Rogers [this message]
2025-04-30 17:49 ` [PATCH v2 07/47] tools lib: " Ian Rogers
2025-04-30 17:49 ` [PATCH v2 08/47] libperf: " Ian Rogers
2025-04-30 17:49 ` [PATCH v2 09/47] tools subcmd: " Ian Rogers
2025-04-30 17:49 ` [PATCH v2 10/47] perf arch x86: " Ian Rogers
2025-04-30 17:49 ` [PATCH v2 11/47] perf arm-spe: " Ian Rogers
2025-04-30 17:50 ` [PATCH v2 12/47] perf trace: " Ian Rogers
2025-04-30 17:50 ` [PATCH v2 13/47] perf trace-event: " Ian Rogers
2025-04-30 17:50 ` [PATCH v2 14/47] perf jvmti: " Ian Rogers
2025-04-30 17:50 ` [PATCH v2 15/47] perf pmu: " Ian Rogers
2025-04-30 17:50 ` [PATCH v2 16/47] perf annotate powerpc: " Ian Rogers
2025-04-30 17:50 ` [PATCH v2 17/47] perf s390: " Ian Rogers
2025-04-30 17:50 ` [PATCH v2 18/47] perf cs-etm: " Ian Rogers
2025-04-30 17:50 ` [PATCH v2 19/47] perf stat: " Ian Rogers
2025-04-30 17:50 ` [PATCH v2 20/47] perf dlfilter: " Ian Rogers
2025-04-30 17:50 ` [PATCH v2 21/47] perf demangle: " Ian Rogers
2025-04-30 17:50 ` [PATCH v2 22/47] perf annotate: " Ian Rogers
2025-04-30 17:50 ` [PATCH v2 23/47] perf report: " Ian Rogers
2025-04-30 17:50 ` [PATCH v2 24/47] perf help: " Ian Rogers
2025-04-30 17:50 ` [PATCH v2 25/47] perf hisi-ptt: " Ian Rogers
2025-04-30 17:50 ` [PATCH v2 26/47] perf probe: " Ian Rogers
2025-04-30 17:50 ` [PATCH v2 27/47] perf kwork: " Ian Rogers
2025-04-30 17:50 ` [PATCH v2 28/47] perf buildid: " Ian Rogers
2025-04-30 17:50 ` [PATCH v2 29/47] perf lock: " Ian Rogers
2025-04-30 17:50 ` [PATCH v2 30/47] perf mem: " Ian Rogers
2025-04-30 17:50 ` [PATCH v2 31/47] perf script: " Ian Rogers
2025-04-30 17:50 ` [PATCH v2 32/47] perf evlist: " Ian Rogers
2025-04-30 17:50 ` [PATCH v2 33/47] perf bpf_counter: " Ian Rogers
2025-04-30 17:50 ` [PATCH v2 34/47] perf ftrace: " Ian Rogers
2025-04-30 17:50 ` [PATCH v2 35/47] perf record: " Ian Rogers
2025-04-30 17:50 ` [PATCH v2 36/47] perf inject: " Ian Rogers
2025-04-30 17:50 ` [PATCH v2 37/47] perf sched: " Ian Rogers
2025-04-30 17:50 ` [PATCH v2 38/47] perf timechart: " Ian Rogers
2025-04-30 17:50 ` [PATCH v2 39/47] perf list: " Ian Rogers
2025-04-30 17:50 ` [PATCH v2 40/47] perf kvm: " Ian Rogers
2025-04-30 17:50 ` [PATCH v2 41/47] perf diff: " Ian Rogers
2025-04-30 17:50 ` [PATCH v2 42/47] perf daemon: " Ian Rogers
2025-04-30 17:50 ` [PATCH v2 43/47] perf zlib: " Ian Rogers
2025-04-30 17:50 ` [PATCH v2 44/47] perf symbol: " Ian Rogers
2025-04-30 17:50 ` [PATCH v2 45/47] perf util: " Ian Rogers
2025-04-30 17:50 ` [PATCH v2 46/47] perf hashmap: " Ian Rogers
2025-04-30 17:50 ` [PATCH v2 47/47] perf: " Ian Rogers

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