* Re: [PATCH v2] trace: Fix some checker warnings
[not found] <167023571258.382307.15314866482834835192.stgit@warthog.procyon.org.uk>
@ 2022-12-06 13:18 ` Masami Hiramatsu
2022-12-06 13:24 ` David Howells
1 sibling, 0 replies; 5+ messages in thread
From: Masami Hiramatsu @ 2022-12-06 13:18 UTC (permalink / raw)
To: David Howells; +Cc: rostedt, linux-kernel, Linux Trace Kernel
On Mon, 05 Dec 2022 10:21:52 +0000
David Howells <dhowells@redhat.com> wrote:
> Fix some checker warnings in the trace code by adding __printf attributes
> to a number of trace functions and their declarations.
>
> Changes:
> ========
> ver #2)
> - Dropped the fix for the unconditional tracing_max_lat_fops decl[1].
>
Acked-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
Thank you!
> Signed-off-by: David Howells <dhowells@redhat.com>
> cc: Steven Rostedt <rostedt@goodmis.org>
> cc: Masami Hiramatsu <mhiramat@kernel.org>
> Link: https://lore.kernel.org/r/20221205180617.9b9d3971cbe06ee536603523@kernel.org/ [1]
> Link: https://lore.kernel.org/r/166992525941.1716618.13740663757583361463.stgit@warthog.procyon.org.uk/ # v1
> ---
>
> include/linux/trace_events.h | 3 ++-
> include/linux/trace_seq.h | 3 ++-
> kernel/trace/trace.h | 2 +-
> kernel/trace/trace_output.c | 5 +++--
> 4 files changed, 8 insertions(+), 5 deletions(-)
>
> diff --git a/include/linux/trace_events.h b/include/linux/trace_events.h
> index 20749bd9db71..112b08ca2c5c 100644
> --- a/include/linux/trace_events.h
> +++ b/include/linux/trace_events.h
> @@ -235,7 +235,8 @@ void tracing_record_taskinfo_sched_switch(struct task_struct *prev,
> void tracing_record_cmdline(struct task_struct *task);
> void tracing_record_tgid(struct task_struct *task);
>
> -int trace_output_call(struct trace_iterator *iter, char *name, char *fmt, ...);
> +int trace_output_call(struct trace_iterator *iter, char *name, char *fmt, ...)
> + __printf(3, 4);
>
> struct event_filter;
>
> diff --git a/include/linux/trace_seq.h b/include/linux/trace_seq.h
> index 5a2c650d9e1c..0c4c7587d6c3 100644
> --- a/include/linux/trace_seq.h
> +++ b/include/linux/trace_seq.h
> @@ -97,7 +97,8 @@ extern int trace_seq_hex_dump(struct trace_seq *s, const char *prefix_str,
> const void *buf, size_t len, bool ascii);
>
> #else /* CONFIG_TRACING */
> -static inline void trace_seq_printf(struct trace_seq *s, const char *fmt, ...)
> +static inline __printf(2, 3)
> +void trace_seq_printf(struct trace_seq *s, const char *fmt, ...)
> {
> }
> static inline void
> diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h
> index d42e24507152..ecc6120116da 100644
> --- a/kernel/trace/trace.h
> +++ b/kernel/trace/trace.h
> @@ -615,7 +615,7 @@ void trace_buffer_unlock_commit_nostack(struct trace_buffer *buffer,
> bool trace_is_tracepoint_string(const char *str);
> const char *trace_event_format(struct trace_iterator *iter, const char *fmt);
> void trace_check_vprintf(struct trace_iterator *iter, const char *fmt,
> - va_list ap);
> + va_list ap) __printf(2, 0);
>
> int trace_empty(struct trace_iterator *iter);
>
> diff --git a/kernel/trace/trace_output.c b/kernel/trace/trace_output.c
> index 67f47ea27921..7039cd883c8b 100644
> --- a/kernel/trace/trace_output.c
> +++ b/kernel/trace/trace_output.c
> @@ -323,8 +323,9 @@ void trace_event_printf(struct trace_iterator *iter, const char *fmt, ...)
> }
> EXPORT_SYMBOL(trace_event_printf);
>
> -static int trace_output_raw(struct trace_iterator *iter, char *name,
> - char *fmt, va_list ap)
> +static __printf(3, 0)
> +int trace_output_raw(struct trace_iterator *iter, char *name,
> + char *fmt, va_list ap)
> {
> struct trace_seq *s = &iter->seq;
>
>
>
--
Masami Hiramatsu (Google) <mhiramat@kernel.org>
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