tracing/filters: operand can be negative
This should be a bug: # cat format name: foo_bar ID: 71 format: ... field:int bar; offset:24; size:4; # echo 'bar < 0' > filter # echo 'bar < -1' > filter bash: echo: write error: Invalid argument [ Impact: fix to allow negative operand in filer expr ] Acked-by: NFrederic Weisbecker <fweisbec@gmail.com> Signed-off-by: NLi Zefan <lizf@cn.fujitsu.com> LKML-Reference: <4A35B8DF.60400@cn.fujitsu.com> Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>
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