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authorAndy Lutomirski <luto@kernel.org>2016-05-26 22:00:33 +0300
committerSteven Rostedt <rostedt@goodmis.org>2016-06-20 16:54:20 +0300
commite2ace001176dc9745a472fe8bda1f0b28a4d7351 (patch)
treeb278062869848c20cd6075696ee8271a4b09de62 /samples/Kconfig
parent35abb67de744b5dbaec54381f2f9e0246089331d (diff)
downloadlinux-e2ace001176dc9745a472fe8bda1f0b28a4d7351.tar.xz
tracing: Choose static tp_printk buffer by explicit nesting count
Currently, the trace_printk code chooses which static buffer to use based on what type of atomic context (NMI, IRQ, etc) it's in. Simplify the code and make it more robust: simply count the nesting depth and choose a buffer based on the current nesting depth. The new code will only drop an event if we nest more than 4 deep, and the old code was guaranteed to malfunction if that happened. Link: http://lkml.kernel.org/r/07ab03aecfba25fcce8f9a211b14c9c5e2865c58.1464289095.git.luto@kernel.org Acked-by: Namhyung Kim <namhyung@kernel.org> Signed-off-by: Andy Lutomirski <luto@kernel.org> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
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