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ANDROID: irqdesc: Export symbol for vendor modules

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Export kstat_irqs_usr and kstat_irqs_cpu symbols for vendor
loadable modules. These symbols are useful for continuous
monitoring of irq stats to detect problems like interrupt
storms.

1) kstat_irqs_usr: it helps in getting total interrupt count
   for an IRQ.

2) kstat_irqs_cpu: it helps in getting per cpu interrupt count
   for an IRQ.

Bug: 177393442
Change-Id: I6f65c5759cd096db391e1c41e4260aa4ebc40fb4
Signed-off-by: Prateek Sood <prsood@codeaurora.org>
Signed-off-by: Mukesh Ojha <mojha@codeaurora.org>
This commit is contained in:
Prateek Sood
2021-01-06 21:14:55 +05:30
committed by Todd Kjos
parent fbbc48ef18
commit 4c01e71cc8
1 changed files with 2 additions and 0 deletions
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2
kernel/irq/irqdesc.c
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@@ -920,6 +920,7 @@ unsigned int kstat_irqs_cpu(unsigned int irq, int cpu)
return desc && desc->kstat_irqs ?
*per_cpu_ptr(desc->kstat_irqs, cpu) : 0;
}
EXPORT_SYMBOL_GPL(kstat_irqs_cpu);
static bool irq_is_nmi(struct irq_desc *desc)
{
@@ -977,3 +978,4 @@ void __irq_set_lockdep_class(unsigned int irq, struct lock_class_key *lock_class
}
EXPORT_SYMBOL_GPL(__irq_set_lockdep_class);
#endif
EXPORT_SYMBOL_GPL(kstat_irqs_usr);