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| author | Steven Rostedt <srostedt@redhat.com> | 2009-03-03 13:53:07 -0500 |
|---|---|---|
| committer | Steven Rostedt <srostedt@redhat.com> | 2009-03-03 20:52:01 -0500 |
| commit | e3d6bf0a0781a269f34250fd41e0d3dbfe540cf1 (patch) | |
| tree | 71ae10423f61c30d8a6c9cb08779b2f1066c89ad /kernel/trace/ring_buffer.c | |
| parent | ef7a4a161472b952941bf78855a9cd95703c024e (diff) | |
| download | lwn-e3d6bf0a0781a269f34250fd41e0d3dbfe540cf1.tar.gz lwn-e3d6bf0a0781a269f34250fd41e0d3dbfe540cf1.zip | |
ring-buffer: replace sizeof of event header with offsetof
Impact: fix to possible alignment problems on some archs.
Some arch compilers include an NULL char array in the sizeof field.
Since the ring_buffer_event type includes one of these, it is better
to use the "offsetof" instead, to avoid strange bugs on these archs.
Signed-off-by: Steven Rostedt <srostedt@redhat.com>
Diffstat (limited to 'kernel/trace/ring_buffer.c')
| -rw-r--r-- | kernel/trace/ring_buffer.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/trace/ring_buffer.c b/kernel/trace/ring_buffer.c index 2ad6bae95a3d..27cf834d8b4e 100644 --- a/kernel/trace/ring_buffer.c +++ b/kernel/trace/ring_buffer.c @@ -132,7 +132,7 @@ void ring_buffer_normalize_time_stamp(int cpu, u64 *ts) } EXPORT_SYMBOL_GPL(ring_buffer_normalize_time_stamp); -#define RB_EVNT_HDR_SIZE (sizeof(struct ring_buffer_event)) +#define RB_EVNT_HDR_SIZE (offsetof(struct ring_buffer_event, array)) #define RB_ALIGNMENT 4U #define RB_MAX_SMALL_DATA 28 |