From: Nathan Chancellor <nathan@kernel.org> To: Justin Stitt <justinstitt@google.com> Cc: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>, Liam Girdwood <lgirdwood@gmail.com>, Peter Ujfalusi <peter.ujfalusi@linux.intel.com>, Bard Liao <yung-chuan.liao@linux.intel.com>, Ranjani Sridharan <ranjani.sridharan@linux.intel.com>, Daniel Baluta <daniel.baluta@nxp.com>, Mark Brown <broonie@kernel.org>, Jaroslav Kysela <perex@perex.cz>, Takashi Iwai <tiwai@suse.com>, Nick Desaulniers <ndesaulniers@google.com>, Kai Vehmanen <kai.vehmanen@linux.intel.com>, Tom Rix <trix@redhat.com>, sound-open-firmware@alsa-project.org, alsa-devel@alsa-project.org, linux-kernel@vger.kernel.org, llvm@lists.linux.dev Subject: Re: [PATCH] soc: sof: fix clang -Wformat warnings Date: Thu, 21 Jul 2022 14:22:30 -0700 [thread overview] Message-ID: <YtnDltqEVeJQQkbW@dev-arch.thelio-3990X> (raw) In-Reply-To: <20220721211218.4039288-1-justinstitt@google.com> On Thu, Jul 21, 2022 at 02:12:18PM -0700, Justin Stitt wrote: > When building with Clang we encounter these warnings: > | sound/soc/sof/ipc3-topology.c:2343:4: error: format specifies type > | 'unsigned char' but the argument has type 'int' [-Werror,-Wformat] > | SOF_ABI_MAJOR, SOF_ABI_MINOR, SOF_ABI_PATCH); > | ^~~~~~~~~~~~~~~^~~~~~~~~~~~~~~^~~~~~~~~~~~~ > > Use correct format specifier `%d` since args are of type int. > > Link: https://github.com/ClangBuiltLinux/linux/issues/378 > Reported-by: Nathan Chancellor <nathan@kernel.org> > Suggested-by: Nathan Chancellor <nathan@kernel.org> > Signed-off-by: Justin Stitt <justinstitt@google.com> Indeed, decimal integer literals with no suffix are of type 'int' when they can fit in an 'int'. In this case, there shouldn't be a bug since the values of these macros can fit in an 'unsigned char' (so no truncation) but it is still correct to use '%d' instead of '%hhu', which matches the stance of commit cbacb5ab0aa0 ("docs: printk-formats: Stop encouraging use of unnecessary %h[xudi] and %hh[xudi]"). This was introduced by commit 323aa1f093e6 ("ASoC: SOF: Add a new IPC op for parsing topology manifest"), not sure it warrants a fixes tag for the reason I outlined above, but it might be helpful for other reviewers. Reviewed-by: Nathan Chancellor <nathan@kernel.org> > --- > Reported by Nathan here: > https://lore.kernel.org/all/YtmrCJjQrSbv8Aj1@dev-arch.thelio-3990X/ > > sound/soc/sof/ipc3-topology.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/sound/soc/sof/ipc3-topology.c b/sound/soc/sof/ipc3-topology.c > index b2cc046b9f60..65923e7a5976 100644 > --- a/sound/soc/sof/ipc3-topology.c > +++ b/sound/soc/sof/ipc3-topology.c > @@ -2338,7 +2338,7 @@ static int sof_ipc3_parse_manifest(struct snd_soc_component *scomp, int index, > } > > dev_info(scomp->dev, > - "Topology: ABI %d:%d:%d Kernel ABI %hhu:%hhu:%hhu\n", > + "Topology: ABI %d:%d:%d Kernel ABI %d:%d:%d\n", > man->priv.data[0], man->priv.data[1], man->priv.data[2], > SOF_ABI_MAJOR, SOF_ABI_MINOR, SOF_ABI_PATCH); > > -- > 2.37.1.359.gd136c6c3e2-goog >
WARNING: multiple messages have this Message-ID (diff)
From: Nathan Chancellor <nathan@kernel.org> To: Justin Stitt <justinstitt@google.com> Cc: Nick Desaulniers <ndesaulniers@google.com>, alsa-devel@alsa-project.org, llvm@lists.linux.dev, Kai Vehmanen <kai.vehmanen@linux.intel.com>, Liam Girdwood <lgirdwood@gmail.com>, Bard Liao <yung-chuan.liao@linux.intel.com>, Takashi Iwai <tiwai@suse.com>, Peter Ujfalusi <peter.ujfalusi@linux.intel.com>, Ranjani Sridharan <ranjani.sridharan@linux.intel.com>, Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>, Mark Brown <broonie@kernel.org>, Tom Rix <trix@redhat.com>, Daniel Baluta <daniel.baluta@nxp.com>, linux-kernel@vger.kernel.org, sound-open-firmware@alsa-project.org Subject: Re: [PATCH] soc: sof: fix clang -Wformat warnings Date: Thu, 21 Jul 2022 14:22:30 -0700 [thread overview] Message-ID: <YtnDltqEVeJQQkbW@dev-arch.thelio-3990X> (raw) In-Reply-To: <20220721211218.4039288-1-justinstitt@google.com> On Thu, Jul 21, 2022 at 02:12:18PM -0700, Justin Stitt wrote: > When building with Clang we encounter these warnings: > | sound/soc/sof/ipc3-topology.c:2343:4: error: format specifies type > | 'unsigned char' but the argument has type 'int' [-Werror,-Wformat] > | SOF_ABI_MAJOR, SOF_ABI_MINOR, SOF_ABI_PATCH); > | ^~~~~~~~~~~~~~~^~~~~~~~~~~~~~~^~~~~~~~~~~~~ > > Use correct format specifier `%d` since args are of type int. > > Link: https://github.com/ClangBuiltLinux/linux/issues/378 > Reported-by: Nathan Chancellor <nathan@kernel.org> > Suggested-by: Nathan Chancellor <nathan@kernel.org> > Signed-off-by: Justin Stitt <justinstitt@google.com> Indeed, decimal integer literals with no suffix are of type 'int' when they can fit in an 'int'. In this case, there shouldn't be a bug since the values of these macros can fit in an 'unsigned char' (so no truncation) but it is still correct to use '%d' instead of '%hhu', which matches the stance of commit cbacb5ab0aa0 ("docs: printk-formats: Stop encouraging use of unnecessary %h[xudi] and %hh[xudi]"). This was introduced by commit 323aa1f093e6 ("ASoC: SOF: Add a new IPC op for parsing topology manifest"), not sure it warrants a fixes tag for the reason I outlined above, but it might be helpful for other reviewers. Reviewed-by: Nathan Chancellor <nathan@kernel.org> > --- > Reported by Nathan here: > https://lore.kernel.org/all/YtmrCJjQrSbv8Aj1@dev-arch.thelio-3990X/ > > sound/soc/sof/ipc3-topology.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/sound/soc/sof/ipc3-topology.c b/sound/soc/sof/ipc3-topology.c > index b2cc046b9f60..65923e7a5976 100644 > --- a/sound/soc/sof/ipc3-topology.c > +++ b/sound/soc/sof/ipc3-topology.c > @@ -2338,7 +2338,7 @@ static int sof_ipc3_parse_manifest(struct snd_soc_component *scomp, int index, > } > > dev_info(scomp->dev, > - "Topology: ABI %d:%d:%d Kernel ABI %hhu:%hhu:%hhu\n", > + "Topology: ABI %d:%d:%d Kernel ABI %d:%d:%d\n", > man->priv.data[0], man->priv.data[1], man->priv.data[2], > SOF_ABI_MAJOR, SOF_ABI_MINOR, SOF_ABI_PATCH); > > -- > 2.37.1.359.gd136c6c3e2-goog >
next prev parent reply other threads:[~2022-07-21 21:22 UTC|newest] Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top 2022-07-21 21:12 [PATCH] soc: sof: fix clang -Wformat warnings Justin Stitt 2022-07-21 21:12 ` Justin Stitt 2022-07-21 21:22 ` Nathan Chancellor [this message] 2022-07-21 21:22 ` Nathan Chancellor 2022-08-02 20:25 ` Nathan Chancellor 2022-08-02 20:25 ` Nathan Chancellor 2022-08-03 11:44 ` Mark Brown 2022-08-03 11:44 ` Mark Brown
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