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| author |   Changbin Du <changbin.du@gmail.com> | 2020-01-11 20:54:27 +0800 |
|---|---|---|
| committer |   Borislav Petkov <bp@suse.de> | 2020-01-11 15:55:39 +0100 |
| commit | 248ed51048c40d36728e70914e38bffd7821da57 (patch) | |
| tree | 9b5eed653ff1b880fa2b7ae8c9b9767ed1db2346 /tools/testing | |
| parent | x86/traps: Cleanup do_general_protection() (diff) | |
| download | linux-dev-248ed51048c40d36728e70914e38bffd7821da57.tar.xz linux-dev-248ed51048c40d36728e70914e38bffd7821da57.zip | |
x86/nmi: Remove irq_work from the long duration NMI handler
First, printk() is NMI-context safe now since the safe printk() has been
implemented and it already has an irq_work to make NMI-context safe.
Second, this NMI irq_work actually does not work if a NMI handler causes
panic by watchdog timeout. It has no chance to run in such case, while
the safe printk() will flush its per-cpu buffers before panicking.
While at it, repurpose the irq_work callback into a function which
concentrates the NMI duration checking and makes the code easier to
follow.
[ bp: Massage. ]
Signed-off-by: Changbin Du <changbin.du@gmail.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lkml.kernel.org/r/20200111125427.15662-1-changbin.du@gmail.com
Diffstat (limited to 'tools/testing')
0 files changed, 0 insertions, 0 deletions