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AJvYcCXRFoy5I2qYJWNR7Vfk0SIfMbZF08gsd6BSJp8D3McnuDkpuboCuHmXr4LoHmw+xMNrQi8FQ3tYTYmwH/o=@vger.kernel.org X-Gm-Message-State: AOJu0YzQOhNv0SAFBBoKpxhX15WtwJwqD8Cr/zdwilQbHL63mwfVPTx0 4HsMTUwxGUi5iSlhgwtk30wlf2oIh057zfp27YJC/o5gNAU2UbIceYFhZvAfrJq8tX8kVMyJPx2 TM5rZAg== X-Google-Smtp-Source: AGHT+IEJ2D69UYPiouVutAbkRbHVsxjAhnNCDOYzCLqniaLRZ6J5FNujGK2lT5LaK02WEQghfdvYk/R5HGWC X-Received: from oablk13.prod.google.com ([2002:a05:6870:3e0d:b0:29d:f69c:1743]) (user=irogers job=prod-delivery.src-stubby-dispatcher) by 2002:a05:6871:293:b0:29e:40f8:ad9b with SMTP id 586e51a60fabf-2cbcf513e8dmr8987528fac.14.1743531926639; Tue, 01 Apr 2025 11:25:26 -0700 (PDT) Date: Tue, 1 Apr 2025 11:23:23 -0700 In-Reply-To: <20250401182347.3422199-1-irogers@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20250401182347.3422199-1-irogers@google.com> X-Mailer: git-send-email 2.49.0.504.g3bcea36a83-goog Message-ID: <20250401182347.3422199-26-irogers@google.com> Subject: [PATCH v1 25/48] perf help: Silence -Wshorten-64-to-32 warnings From: Ian Rogers To: Yury Norov , Rasmus Villemoes , Peter Zijlstra , Ingo Molnar , Arnaldo Carvalho de Melo , Namhyung Kim , Mark Rutland , Alexander Shishkin , Jiri Olsa , Ian Rogers , Adrian Hunter , Kan Liang , Thomas Gleixner , Darren Hart , Davidlohr Bueso , "=?UTF-8?q?Andr=C3=A9=20Almeida?=" , John Garry , Will Deacon , James Clark , Mike Leach , Leo Yan , Yicong Yang , Jonathan Cameron , Nathan Chancellor , Bill Wendling , Justin Stitt , Josh Poimboeuf , Al Viro , Kyle Meyer , Ben Gainey , Athira Rajeev , Kajol Jain , Aditya Gupta , Eder Zulian , Dapeng Mi , Kuan-Wei Chiu , He Zhe , Dirk Gouders , Brian Geffon , Ravi Bangoria , Howard Chu , Charlie Jenkins , Colin Ian King , Dominique Martinet , Jann Horn , Masahiro Yamada , Arnd Bergmann , Yang Jihong , Dmitry Vyukov , Andi Kleen , Graham Woodward , Ilkka Koskinen , Anshuman Khandual , Zhongqiu Han , Hao Ge , Tengda Wu , Gabriele Monaco , Chun-Tse Shao , Casey Chen , "Dr. David Alan Gilbert" , Li Huafei , "Steinar H. Gunderson" , Levi Yun , Weilin Wang , Thomas Falcon , Thomas Richter , Andrew Kreimer , "=?UTF-8?q?Krzysztof=20=C5=81opatowski?=" , Christophe Leroy , Jean-Philippe Romain , Junhao He , "Masami Hiramatsu (Google)" , Xu Yang , Steve Clevenger , Zixian Cai , Stephen Brennan , Yujie Liu , linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org, linux-arm-kernel@lists.infradead.org, llvm@lists.linux.dev Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" 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 --- tools/perf/builtin-help.c | 4 ++-- tools/perf/util/help-unknown-cmd.c | 14 ++++++++------ tools/perf/util/levenshtein.c | 18 +++++++++--------- 3 files changed, 19 insertions(+), 17 deletions(-) diff --git a/tools/perf/builtin-help.c b/tools/perf/builtin-help.c index 7be6fb6df595..05151c68191f 100644 --- a/tools/perf/builtin-help.c +++ b/tools/perf/builtin-help.c @@ -301,7 +301,7 @@ static struct cmdnames main_cmds, other_cmds; =20 void list_common_cmds_help(void) { - unsigned int i, longest =3D 0; + size_t i, longest =3D 0; =20 for (i =3D 0; i < ARRAY_SIZE(common_cmds); i++) { if (longest < strlen(common_cmds[i].name)) @@ -310,7 +310,7 @@ void list_common_cmds_help(void) =20 puts(" The most commonly used perf commands are:"); for (i =3D 0; i < ARRAY_SIZE(common_cmds); i++) { - printf(" %-*s ", longest, common_cmds[i].name); + printf(" %-*s ", (int)longest, common_cmds[i].name); puts(common_cmds[i].help); } } diff --git a/tools/perf/util/help-unknown-cmd.c b/tools/perf/util/help-unkn= own-cmd.c index a0a46e34f8d1..f0a0b8c13a92 100644 --- a/tools/perf/util/help-unknown-cmd.c +++ b/tools/perf/util/help-unknown-cmd.c @@ -24,14 +24,15 @@ static int levenshtein_compare(const void *p1, const vo= id *p2) { const struct cmdname *const *c1 =3D p1, *const *c2 =3D p2; const char *s1 =3D (*c1)->name, *s2 =3D (*c2)->name; - int l1 =3D (*c1)->len; - int l2 =3D (*c2)->len; - return l1 !=3D l2 ? l1 - l2 : strcmp(s1, s2); + ssize_t l1 =3D (*c1)->len; + ssize_t l2 =3D (*c2)->len; + + return l1 !=3D l2 ? (int)(l1 - l2) : (int)strcmp(s1, s2); } =20 static int add_cmd_list(struct cmdnames *cmds, struct cmdnames *old) { - unsigned int i, nr =3D cmds->cnt + old->cnt; + size_t nr =3D cmds->cnt + old->cnt; void *tmp; =20 if (nr > cmds->alloc) { @@ -45,7 +46,7 @@ static int add_cmd_list(struct cmdnames *cmds, struct cmd= names *old) return -1; cmds->names =3D tmp; } - for (i =3D 0; i < old->cnt; i++) + for (size_t i =3D 0; i < old->cnt; i++) cmds->names[cmds->cnt++] =3D old->names[i]; zfree(&old->names); old->cnt =3D 0; @@ -54,7 +55,8 @@ static int add_cmd_list(struct cmdnames *cmds, struct cmd= names *old) =20 const char *help_unknown_cmd(const char *cmd, struct cmdnames *main_cmds) { - unsigned int i, n =3D 0, best_similarity =3D 0; + unsigned int i, n =3D 0; + size_t best_similarity =3D 0; struct cmdnames other_cmds; =20 memset(&other_cmds, 0, sizeof(other_cmds)); diff --git a/tools/perf/util/levenshtein.c b/tools/perf/util/levenshtein.c index 6a6712635aa4..f6912b848c4a 100644 --- a/tools/perf/util/levenshtein.c +++ b/tools/perf/util/levenshtein.c @@ -44,19 +44,19 @@ int levenshtein(const char *string1, const char *string2, int w, int s, int a, int d) { - int len1 =3D strlen(string1), len2 =3D strlen(string2); + size_t len1 =3D strlen(string1), len2 =3D strlen(string2); int *row0 =3D malloc(sizeof(int) * (len2 + 1)); int *row1 =3D malloc(sizeof(int) * (len2 + 1)); int *row2 =3D malloc(sizeof(int) * (len2 + 1)); - int i, j; + int ret; =20 - for (j =3D 0; j <=3D len2; j++) - row1[j] =3D j * a; - for (i =3D 0; i < len1; i++) { + for (size_t j =3D 0; j <=3D len2; j++) + row1[j] =3D (int)j * a; + for (size_t i =3D 0; i < len1; i++) { int *dummy; =20 - row2[0] =3D (i + 1) * d; - for (j =3D 0; j < len2; j++) { + row2[0] =3D ((int)i + 1) * d; + for (size_t j =3D 0; j < len2; j++) { /* substitution */ row2[j + 1] =3D row1[j] + s * (string1[i] !=3D string2[j]); /* swap */ @@ -78,10 +78,10 @@ int levenshtein(const char *string1, const char *string= 2, row2 =3D dummy; } =20 - i =3D row1[len2]; + ret =3D row1[len2]; free(row0); free(row1); free(row2); =20 - return i; + return ret; } --=20 2.49.0.504.g3bcea36a83-goog