From: Jerry Snitselaar <jsnitsel@redhat.com>
To: linux-kernel@vger.kernel.org
Cc: linux-integrity@vger.kernel.org, intel-gfx@lists.freedesktop.org,
dri-devel@lists.freedesktop.org,
kernel test robot <lkp@intel.com>,
Thomas Gleixner <tglx@linutronix.de>,
Jarkko Sakkinen <jarkko@kernel.org>,
Jason Gunthorpe <jgg@ziepe.ca>, Peter Huewe <peterhuewe@gmx.de>,
James Bottomley <James.Bottomley@HansenPartnership.com>,
Matthew Garrett <mjg59@google.com>,
Hans de Goede <hdegoede@redhat.com>
Subject: [PATCH v3 1/4] irq: export kstat_irqs
Date: Fri, 4 Dec 2020 18:43:37 -0700 [thread overview]
Message-ID: <20201205014340.148235-2-jsnitsel@redhat.com> (raw)
In-Reply-To: <20201205014340.148235-1-jsnitsel@redhat.com>
To try and detect potential interrupt storms that
have been occurring with tpm_tis devices it was suggested
to use kstat_irqs() to get the number of interrupts.
Since tpm_tis can be built as a module it needs kstat_irqs
exported.
Reported-by: kernel test robot <lkp@intel.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Jarkko Sakkinen <jarkko@kernel.org>
Cc: Jason Gunthorpe <jgg@ziepe.ca>
Cc: Peter Huewe <peterhuewe@gmx.de>
Cc: James Bottomley <James.Bottomley@HansenPartnership.com>
Cc: Matthew Garrett <mjg59@google.com>
Cc: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Jerry Snitselaar <jsnitsel@redhat.com>
---
include/linux/irqdesc.h | 1 +
kernel/irq/irqdesc.c | 1 +
2 files changed, 2 insertions(+)
diff --git a/include/linux/irqdesc.h b/include/linux/irqdesc.h
index 5745491303e0..fff88c1f1ac6 100644
--- a/include/linux/irqdesc.h
+++ b/include/linux/irqdesc.h
@@ -153,6 +153,7 @@ static inline void generic_handle_irq_desc(struct irq_desc *desc)
}
int generic_handle_irq(unsigned int irq);
+unsigned int kstat_irqs(unsigned int irq);
#ifdef CONFIG_HANDLE_DOMAIN_IRQ
/*
diff --git a/kernel/irq/irqdesc.c b/kernel/irq/irqdesc.c
index 1a7723604399..12398ef1796b 100644
--- a/kernel/irq/irqdesc.c
+++ b/kernel/irq/irqdesc.c
@@ -1000,6 +1000,7 @@ unsigned int kstat_irqs(unsigned int irq)
sum += *per_cpu_ptr(desc->kstat_irqs, cpu);
return sum;
}
+EXPORT_SYMBOL_GPL(kstat_irqs);
/**
* kstat_irqs_usr - Get the statistics for an interrupt
--
2.27.0
next prev parent reply other threads:[~2020-12-05 1:45 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-12-05 1:43 [PATCH v3 0/4] tpm_tis: Detect interrupt storms Jerry Snitselaar
2020-12-05 1:43 ` Jerry Snitselaar [this message]
2020-12-05 10:39 ` [PATCH v3 1/4] irq: export kstat_irqs Jarkko Sakkinen
2020-12-06 16:40 ` Thomas Gleixner
2020-12-06 17:40 ` James Bottomley
2020-12-06 19:29 ` Thomas Gleixner
2020-12-06 17:54 ` Thomas Gleixner
2020-12-06 21:46 ` Jerry Snitselaar
2020-12-05 1:43 ` [PATCH v3 2/4] drm/i915/pmu: Use kstat_irqs to get interrupt count Jerry Snitselaar
2020-12-06 16:38 ` Thomas Gleixner
2020-12-06 21:33 ` Thomas Gleixner
2020-12-08 9:54 ` Jarkko Sakkinen
2020-12-06 21:47 ` Jerry Snitselaar
2020-12-06 23:38 ` Thomas Gleixner
2020-12-10 7:53 ` [Intel-gfx] " Joonas Lahtinen
2020-12-10 10:45 ` Tvrtko Ursulin
2020-12-10 16:35 ` Thomas Gleixner
2020-12-10 17:09 ` Tvrtko Ursulin
2020-12-10 17:44 ` Thomas Gleixner
2020-12-10 17:51 ` Tvrtko Ursulin
2020-12-05 1:43 ` [PATCH v3 3/4] tpm_tis: Disable interrupts if interrupt storm detected Jerry Snitselaar
2020-12-06 19:26 ` Thomas Gleixner
2020-12-07 19:28 ` Jason Gunthorpe
2020-12-07 19:58 ` James Bottomley
2020-12-08 17:43 ` Jarkko Sakkinen
2020-12-08 17:42 ` Jarkko Sakkinen
2020-12-05 1:43 ` [PATCH v3 4/4] tpm_tis: Disable Interrupts on the ThinkPad L490 Jerry Snitselaar
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