Re: [PATCH] Revert "powerpc/64s: machine check interrupt update NMI accounting"

[peterz]

On Tue, Sep 15, 2020 at 08:06:59PM +0200, Michal Suchanek wrote:
> This reverts commit 116ac378bb3ff844df333e7609e7604651a0db9d.
> 
> This commit causes the kernel to oops and reboot when injecting a SLB
> multihit which causes a MCE.
> 
> Before this commit a SLB multihit was corrected by the kernel and the
> system continued to operate normally.
> 
> cc: stable@xxxxxxxxxxxxxxx
> Fixes: 116ac378bb3f ("powerpc/64s: machine check interrupt update NMI accounting")
> Signed-off-by: Michal Suchanek <msuchanek@xxxxxxx>

Ever since 69ea03b56ed2 ("hardirq/nmi: Allow nested nmi_enter()")
nmi_enter() supports nesting natively.