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tracing: Fix some checker warnings 

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].

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
Link: https://lkml.kernel.org/r/167023571258.382307.15314866482834835192.stgit@warthog.procyon.org.uk

Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
This commit is contained in:
David Howells 2022-12-05 10:21:52 +00:00 committed by Steven Rostedt (Google)
parent ec370890f9
commit bfd5a5e82d
4 changed files with 8 additions and 5 deletions
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3
include/linux/trace_events.h
View File

@ -234,7 +234,8 @@ 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;

3
include/linux/trace_seq.h
View File

@ -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

2
kernel/trace/trace.h
View File

@ -614,7 +614,7 @@ 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);

5
kernel/trace/trace_output.c
View File

@ -322,8 +322,9 @@ 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;