From acc4988bcf38f9618886eaeb9802aeacc6978ec2 Mon Sep 17 00:00:00 2001 From: Mathieu Desnoyers Date: Tue, 4 Mar 2008 14:29:00 -0800 Subject: [PATCH] markers: add an if(0) to __mark_check_format() Wrap __mark_check_format() into an if(0) to make sure that parameters such as trace_mark(mm_page_alloc, "order %u pfn %lu", order, page?page_to_pfn(page):0); (where page_to_pfn() has side-effects) won't generate code because of the __mark_check_format(). Thanks to Jan Kiszka for reporting this. Signed-off-by: Mathieu Desnoyers Cc: Jan Kiszka Cc: "Frank Ch. Eigler" Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- include/linux/marker.h | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/include/linux/marker.h b/include/linux/marker.h index 5df879dc377..430f6adf976 100644 --- a/include/linux/marker.h +++ b/include/linux/marker.h @@ -104,10 +104,16 @@ static inline void marker_update_probe_range(struct marker *begin, #define MARK_NOARGS " " /* To be used for string format validity checking with gcc */ -static inline void __printf(1, 2) __mark_check_format(const char *fmt, ...) +static inline void __printf(1, 2) ___mark_check_format(const char *fmt, ...) { } +#define __mark_check_format(format, args...) \ + do { \ + if (0) \ + ___mark_check_format(format, ## args); \ + } while (0) + extern marker_probe_func __mark_empty_function; extern void marker_probe_cb(const struct marker *mdata, -- 2.41.1