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authorCodyYao-oc <CodyYao-oc@zhaoxin.com>2021-06-07 10:53:35 +0800
committerPeter Zijlstra <peterz@infradead.org>2021-06-10 10:04:40 +0200
commita8383dfb2138742a1bb77b481ada047aededa2ba (patch)
tree2b05d96e731a709a051f92cbf2c3de834d5ff1e1 /kernel
parent156172a13ff0626d8e23276e741c7e2cb2f3b572 (diff)
x86/nmi_watchdog: Fix old-style NMI watchdog regression on old Intel CPUs
The following commit: 3a4ac121c2ca ("x86/perf: Add hardware performance events support for Zhaoxin CPU.") Got the old-style NMI watchdog logic wrong and broke it for basically every Intel CPU where it was active. Which is only truly old CPUs, so few people noticed. On CPUs with perf events support we turn off the old-style NMI watchdog, so it was pretty pointless to add the logic for X86_VENDOR_ZHAOXIN to begin with ... :-/ Anyway, the fix is to restore the old logic and add a 'break'. [ mingo: Wrote a new changelog. ] Fixes: 3a4ac121c2ca ("x86/perf: Add hardware performance events support for Zhaoxin CPU.") Signed-off-by: CodyYao-oc <CodyYao-oc@zhaoxin.com> Signed-off-by: Ingo Molnar <mingo@kernel.org> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Link: https://lore.kernel.org/r/20210607025335.9643-1-CodyYao-oc@zhaoxin.com
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