tracing: Use __printf markup to silence compiler
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>
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@ -2953,6 +2953,7 @@ out_nobuffer:
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}
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}
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EXPORT_SYMBOL_GPL(trace_vbprintk);
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EXPORT_SYMBOL_GPL(trace_vbprintk);
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__printf(3, 0)
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static int
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static int
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__trace_array_vprintk(struct ring_buffer *buffer,
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__trace_array_vprintk(struct ring_buffer *buffer,
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unsigned long ip, const char *fmt, va_list args)
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unsigned long ip, const char *fmt, va_list args)
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@ -3007,12 +3008,14 @@ out_nobuffer:
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return len;
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return len;
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}
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}
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__printf(3, 0)
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int trace_array_vprintk(struct trace_array *tr,
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int trace_array_vprintk(struct trace_array *tr,
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unsigned long ip, const char *fmt, va_list args)
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unsigned long ip, const char *fmt, va_list args)
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{
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{
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return __trace_array_vprintk(tr->trace_buffer.buffer, ip, fmt, args);
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return __trace_array_vprintk(tr->trace_buffer.buffer, ip, fmt, args);
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}
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}
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__printf(3, 0)
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int trace_array_printk(struct trace_array *tr,
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int trace_array_printk(struct trace_array *tr,
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unsigned long ip, const char *fmt, ...)
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unsigned long ip, const char *fmt, ...)
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{
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{
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@ -3028,6 +3031,7 @@ int trace_array_printk(struct trace_array *tr,
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return ret;
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return ret;
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}
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}
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__printf(3, 4)
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int trace_array_printk_buf(struct ring_buffer *buffer,
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int trace_array_printk_buf(struct ring_buffer *buffer,
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unsigned long ip, const char *fmt, ...)
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unsigned long ip, const char *fmt, ...)
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{
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{
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@ -3043,6 +3047,7 @@ int trace_array_printk_buf(struct ring_buffer *buffer,
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return ret;
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return ret;
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}
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}
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__printf(2, 0)
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int trace_vprintk(unsigned long ip, const char *fmt, va_list args)
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int trace_vprintk(unsigned long ip, const char *fmt, va_list args)
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{
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{
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return trace_array_vprintk(&global_trace, ip, fmt, args);
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return trace_array_vprintk(&global_trace, ip, fmt, args);
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