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| author | Thomas Gleixner <tglx@linutronix.de> | 2019-07-22 20:47:16 +0200 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2019-07-25 15:47:37 +0200 |
| commit | e797bda3fd29137f6c151dfa10ea6a61c17895ce (patch) | |
| tree | cb0bbe066270a64ff96721d63c4b2c5c31cd2591 /include/linux/cpumask.h | |
| parent | ad5e427e0f6b702e52c11d1f7b2b7be3bac7de82 (diff) | |
| download | lwn-e797bda3fd29137f6c151dfa10ea6a61c17895ce.tar.gz lwn-e797bda3fd29137f6c151dfa10ea6a61c17895ce.zip | |
smp/hotplug: Track booted once CPUs in a cpumask
The booted once information which is required to deal with the MCE
broadcast issue on X86 correctly is stored in the per cpu hotplug state,
which is perfectly fine for the intended purpose.
X86 needs that information for supporting NMI broadcasting via shortcuts,
but retrieving it from per cpu data is cumbersome.
Move it to a cpumask so the information can be checked against the
cpu_present_mask quickly.
No functional change intended.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20190722105219.818822855@linutronix.de
Diffstat (limited to 'include/linux/cpumask.h')
| -rw-r--r-- | include/linux/cpumask.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/cpumask.h b/include/linux/cpumask.h index 21755471b1c3..693124900f0a 100644 --- a/include/linux/cpumask.h +++ b/include/linux/cpumask.h @@ -115,6 +115,8 @@ extern struct cpumask __cpu_active_mask; #define cpu_active(cpu) ((cpu) == 0) #endif +extern cpumask_t cpus_booted_once_mask; + static inline void cpu_max_bits_warn(unsigned int cpu, unsigned int bits) { #ifdef CONFIG_DEBUG_PER_CPU_MAPS |