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tracing: Use __printf markup to silence compiler

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Silence warnings (triggered at W=1) by adding relevant __printf attributes.

  CC      kernel/trace/trace.o
kernel/trace/trace.c: In function ‘__trace_array_vprintk’:
kernel/trace/trace.c:2979:2: warning: function might be possible candidate for ‘gnu_printf’ format attribute [-Wsuggest-attribute=format]
  len = vscnprintf(tbuffer, TRACE_BUF_SIZE, fmt, args);
  ^~~
  AR      kernel/trace/built-in.o

Link: http://lkml.kernel.org/r/20180308205843.27447-1-malat@debian.org

Signed-off-by: Mathieu Malaterre <malat@debian.org>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
This commit is contained in:
Mathieu Malaterre 2018-03-08 21:58:43 +01:00 committed by Steven Rostedt (VMware)
parent f26808ba72
commit 26b68dd2f4
1 changed files with 5 additions and 0 deletions
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5
kernel/trace/trace.c
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@ -2953,6 +2953,7 @@ out_nobuffer:
}
EXPORT_SYMBOL_GPL(trace_vbprintk);
__printf(3, 0)
static int
__trace_array_vprintk(struct ring_buffer *buffer,
unsigned long ip, const char *fmt, va_list args)
@ -3007,12 +3008,14 @@ out_nobuffer:
return len;
}
__printf(3, 0)
int trace_array_vprintk(struct trace_array *tr,
unsigned long ip, const char *fmt, va_list args)
{
return __trace_array_vprintk(tr->trace_buffer.buffer, ip, fmt, args);
}
__printf(3, 0)
int trace_array_printk(struct trace_array *tr,
unsigned long ip, const char *fmt, ...)
{
@ -3028,6 +3031,7 @@ int trace_array_printk(struct trace_array *tr,
return ret;
}
__printf(3, 4)
int trace_array_printk_buf(struct ring_buffer *buffer,
unsigned long ip, const char *fmt, ...)
{
@ -3043,6 +3047,7 @@ int trace_array_printk_buf(struct ring_buffer *buffer,
return ret;
}
__printf(2, 0)
int trace_vprintk(unsigned long ip, const char *fmt, va_list args)
{
return trace_array_vprintk(&global_trace, ip, fmt, args);