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| author | Steven Rostedt <srostedt@redhat.com> | 2009-05-08 11:03:57 -0400 |
|---|---|---|
| committer | Steven Rostedt <rostedt@goodmis.org> | 2009-05-11 13:22:26 -0400 |
| commit | d988ff94c1074c4c914235c8591bcceafb585ecf (patch) | |
| tree | 46dc84aa84e04ae92cd66ed5cbf7a55452dcdb1c /kernel/trace/ring_buffer.c | |
| parent | 5a772b2b3c68e7e0b503c5a48469113bb0634314 (diff) | |
| download | lwn-d988ff94c1074c4c914235c8591bcceafb585ecf.tar.gz lwn-d988ff94c1074c4c914235c8591bcceafb585ecf.zip | |
ring-buffer: check for divide by zero in ring-buffer-benchmark
Although we check if "missed" is not zero, we divide by hit + missed,
and the addition can possible overflow and become a divide by zero.
This patch checks for this case, and will report it when it happens
then modify "hit" to make the calculation be non zero.
[ Impact: prevent possible divide by zero in ring-buffer-benchmark ]
Reported-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Diffstat (limited to 'kernel/trace/ring_buffer.c')
0 files changed, 0 insertions, 0 deletions