diff options
| author |   Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca> | 2008-03-04 14:29:00 -0800 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@woody.linux-foundation.org> | 2008-03-04 16:35:14 -0800 |
| commit | acc4988bcf38f9618886eaeb9802aeacc6978ec2 (patch) | |
| tree | 7056c977e8db45f475b4034b5cb299aec37d42a2 /include/linux/marker.h | |
| parent | markers: don't risk NULL deref in marker (diff) | |
| download | linux-dev-acc4988bcf38f9618886eaeb9802aeacc6978ec2.tar.xz linux-dev-acc4988bcf38f9618886eaeb9802aeacc6978ec2.zip | |
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 <mathieu.desnoyers@polymtl.ca>
Cc: Jan Kiszka <jan.kiszka@siemens.com>
Cc: "Frank Ch. Eigler" <fche@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux/marker.h')
| -rw-r--r-- | include/linux/marker.h | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/include/linux/marker.h b/include/linux/marker.h index 5df879dc3776..430f6adf9762 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, |