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authorChangbin Du <changbin.du@gmail.com>2020-01-11 20:54:27 +0800
committerBorislav Petkov <bp@suse.de>2020-01-11 15:55:39 +0100
commit248ed51048c40d36728e70914e38bffd7821da57 (patch)
tree9b5eed653ff1b880fa2b7ae8c9b9767ed1db2346 /mm
parent36209766cede1fe9d39f3d3418d93bbf71ad21c4 (diff)
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 'mm')
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