RE: [PATCH] printk: fixing the deadlock when calling printk in nmihandle

[Liu, Chuansheng]

> > I took many time to dig out this issue.
> 
> Well, it was a known issue..
Still feel unfair :)
If this is a known issue that calling printk is not safe in nmi handler,
Why not defense it like this patch before real solution coming out?
Thanks.
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