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From: Alexei Lozovsky <me@ilammy.net>
To: Thomas Gleixner <tglx@linutronix.de>
Cc: Alexey Dobriyan <adobriyan@gmail.com>,
Christoph Lameter <cl@linux.com>,
LKML <linux-kernel@vger.kernel.org>,
linux-fsdevel@vger.kernel.org
Subject: [PATCH v2 09/12] x86/irq: Use unsigned long for IRQ counter sum
Date: Thu, 16 Sep 2021 02:58:45 +0900 [thread overview]
Message-ID: <20210915175848.162260-10-me@ilammy.net> (raw)
In-Reply-To: <20210915175848.162260-1-me@ilammy.net>
Now that all individual counters consistently use unsigned long, use the
same type for their sum. This ensures correct handling of wrap-around
(which is more important for i386 at this point).
Signed-off-by: Alexei Lozovsky <me@ilammy.net>
---
arch/x86/include/asm/hardirq.h | 4 ++--
arch/x86/kernel/irq.c | 9 ++++-----
2 files changed, 6 insertions(+), 7 deletions(-)
diff --git a/arch/x86/include/asm/hardirq.h b/arch/x86/include/asm/hardirq.h
index 2dc9c076f611..c05b42c4d8cb 100644
--- a/arch/x86/include/asm/hardirq.h
+++ b/arch/x86/include/asm/hardirq.h
@@ -54,10 +54,10 @@ DECLARE_PER_CPU_SHARED_ALIGNED(irq_cpustat_t, irq_stat);
extern void ack_bad_irq(unsigned int irq);
-extern u64 arch_irq_stat_cpu(unsigned int cpu);
+extern unsigned long arch_irq_stat_cpu(unsigned int cpu);
#define arch_irq_stat_cpu arch_irq_stat_cpu
-extern u64 arch_irq_stat(void);
+extern unsigned long arch_irq_stat(void);
#define arch_irq_stat arch_irq_stat
diff --git a/arch/x86/kernel/irq.c b/arch/x86/kernel/irq.c
index 6e7c6b4cebc1..2d889e26ae68 100644
--- a/arch/x86/kernel/irq.c
+++ b/arch/x86/kernel/irq.c
@@ -189,9 +189,9 @@ int arch_show_interrupts(struct seq_file *p, int prec)
/*
* /proc/stat helpers
*/
-u64 arch_irq_stat_cpu(unsigned int cpu)
+unsigned long arch_irq_stat_cpu(unsigned int cpu)
{
- u64 sum = READ_ONCE(irq_stats(cpu)->__nmi_count);
+ unsigned long sum = READ_ONCE(irq_stats(cpu)->__nmi_count);
#ifdef CONFIG_X86_LOCAL_APIC
sum += READ_ONCE(irq_stats(cpu)->apic_timer_irqs);
@@ -219,10 +219,9 @@ u64 arch_irq_stat_cpu(unsigned int cpu)
return sum;
}
-u64 arch_irq_stat(void)
+unsigned long arch_irq_stat(void)
{
- u64 sum = atomic_long_read(&irq_err_count);
- return sum;
+ return atomic_long_read(&irq_err_count);
}
static __always_inline void handle_irq(struct irq_desc *desc,
--
2.25.1
next prev parent reply other threads:[~2021-09-15 17:59 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-09-10 8:53 /proc/stat interrupt counter wrap-around Alexei Lozovsky
2021-09-11 3:48 ` [PATCH 0/7] proc/stat: Maintain monotonicity of "intr" and "softirq" Alexei Lozovsky
2021-09-11 3:48 ` [PATCH 1/7] genirq: Use unsigned int for irqs_sum Alexei Lozovsky
2021-09-11 3:48 ` [PATCH 2/7] powerpc/irq: arch_irq_stat_cpu() returns unsigned int Alexei Lozovsky
2021-09-11 3:48 ` [PATCH 3/7] x86/irq: " Alexei Lozovsky
2021-09-11 3:48 ` [PATCH 4/7] x86/irq: arch_irq_stat() " Alexei Lozovsky
2021-09-11 3:48 ` [PATCH 5/7] proc/stat: Use unsigned int for "intr" sum Alexei Lozovsky
2021-09-11 3:48 ` [PATCH 6/7] proc/stat: Use unsigned int for "softirq" sum Alexei Lozovsky
2021-09-11 3:48 ` [PATCH 7/7] docs: proc.rst: stat: Note the interrupt counter wrap-around Alexei Lozovsky
2021-09-11 3:59 ` Randy Dunlap
2021-09-12 9:30 ` [PATCH 0/7] proc/stat: Maintain monotonicity of "intr" and "softirq" Alexey Dobriyan
2021-09-12 12:37 ` Alexei Lozovsky
2021-09-14 14:11 ` Thomas Gleixner
2021-09-15 4:24 ` Alexei Lozovsky
2021-09-15 17:58 ` [PATCH v2 00/12] " Alexei Lozovsky
2021-09-15 17:58 ` [PATCH v2 01/12] genirq: Use READ_ONCE for IRQ counter reads Alexei Lozovsky
2021-09-15 17:58 ` [PATCH v2 02/12] genirq: Use unsigned long for IRQ counters Alexei Lozovsky
2021-09-15 17:58 ` [PATCH v2 03/12] powerpc/irq: Use READ_ONCE for IRQ counter reads Alexei Lozovsky
2021-09-15 17:58 ` [PATCH v2 04/12] powerpc/irq: Use unsigned long for IRQ counters Alexei Lozovsky
2021-09-15 17:58 ` [PATCH v2 05/12] powerpc/irq: Use unsigned long for IRQ counter sum Alexei Lozovsky
2021-09-15 17:58 ` [PATCH v2 06/12] x86/irq: Use READ_ONCE for IRQ counter reads Alexei Lozovsky
2021-09-15 17:58 ` [PATCH v2 07/12] x86/irq: Use unsigned long for IRQ counters Alexei Lozovsky
2021-09-15 17:58 ` [PATCH v2 08/12] x86/irq: Use unsigned long for IRQ counters more Alexei Lozovsky
2021-09-15 17:58 ` Alexei Lozovsky [this message]
2021-09-15 17:58 ` [PATCH v2 10/12] proc/stat: Use unsigned long for "intr" sum Alexei Lozovsky
2021-09-15 17:58 ` [PATCH v2 11/12] proc/stat: Use unsigned long for "softirq" sum Alexei Lozovsky
2021-09-15 17:58 ` [PATCH v2 12/12] docs: proc.rst: stat: Note the interrupt counter wrap-around Alexei Lozovsky
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