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| author | Andi Kleen | 2017-11-18 00:27:03 +0100 |
|---|---|---|
| committer | Linus Torvalds | 2017-11-18 01:10:00 +0100 |
| commit | b1fca27d384e8418aac84b39f6f5179aecc1b64f (patch) | |
| tree | e08be97de59a1cbb16df46273aadef161358b8ba /lib/bug.c | |
| parent | sh/boot: add static stack-protector to pre-kernel (diff) | |
| download | kernel-qcow2-linux-b1fca27d384e8418aac84b39f6f5179aecc1b64f.tar.gz kernel-qcow2-linux-b1fca27d384e8418aac84b39f6f5179aecc1b64f.tar.xz kernel-qcow2-linux-b1fca27d384e8418aac84b39f6f5179aecc1b64f.zip | |
kernel debug: support resetting WARN*_ONCE
I like _ONCE warnings because it's guaranteed that they don't flood the
log.
During testing I find it useful to reset the state of the once warnings,
so that I can rerun tests and see if they trigger again, or can
guarantee that a test run always hits the same warnings.
This patch adds a debugfs interface to reset all the _ONCE warnings so
that they appear again:
echo 1 > /sys/kernel/debug/clear_warn_once
This is implemented by putting all the warning booleans into a special
section, and clearing it.
[akpm@linux-foundation.org: coding-style fixes]
Link: http://lkml.kernel.org/r/20171017221455.6740-1-andi@firstfloor.org
Signed-off-by: Andi Kleen <ak@linux.intel.com>
Tested-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'lib/bug.c')
0 files changed, 0 insertions, 0 deletions