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author | Steven Rostedt (Red Hat) <rostedt@goodmis.org> | 2015-06-25 18:02:29 -0400 |
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committer | Steven Rostedt <rostedt@goodmis.org> | 2015-06-25 18:02:29 -0400 |
commit | b4875bbe7e68f139bd3383828ae8e994a0df6d28 (patch) | |
tree | 8f0447111b6a91b8f3c8d33ee89d4120312c7955 /drivers/mailbox/Makefile | |
parent | 2cf30dc180cea808077f003c5116388183e54f9e (diff) | |
download | blackbird-op-linux-b4875bbe7e68f139bd3383828ae8e994a0df6d28.tar.gz blackbird-op-linux-b4875bbe7e68f139bd3383828ae8e994a0df6d28.zip |
tracing/filter: Do not WARN on operand count going below zero
When testing the fix for the trace filter, I could not come up with
a scenario where the operand count goes below zero, so I added a
WARN_ON_ONCE(cnt < 0) to the logic. But there is legitimate case
that it can happen (although the filter would be wrong).
# echo '>' > /sys/kernel/debug/events/ext4/ext4_truncate_exit/filter
That is, a single operation without any operands will hit the path
where the WARN_ON_ONCE() can trigger. Although this is harmless,
and the filter is reported as a error. But instead of spitting out
a warning to the kernel dmesg, just fail nicely and report it via
the proper channels.
Link: http://lkml.kernel.org/r/558C6082.90608@oracle.com
Reported-by: Vince Weaver <vincent.weaver@maine.edu>
Reported-by: Sasha Levin <sasha.levin@oracle.com>
Cc: stable@vger.kernel.org # 2.6.33+
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Diffstat (limited to 'drivers/mailbox/Makefile')
0 files changed, 0 insertions, 0 deletions