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genirq: Fix the return type of kstat_cpu_irqs_sum()

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[ Upstream commit 47904aed89 ]

The type of member ->irqs_sum is unsigned long, but kstat_cpu_irqs_sum()
returns int, which can result in truncation.  Therefore, change the
kstat_cpu_irqs_sum() function's return value to unsigned long to avoid
truncation.

Fixes: f2c66cd8ee ("/proc/stat: scalability of irq num per cpu")
Reported-by: Elliott, Robert (Servers) <elliott@hpe.com>
Signed-off-by: Zhen Lei <thunder.leizhen@huawei.com>
Cc: Tejun Heo <tj@kernel.org>
Cc: "Peter Zijlstra (Intel)" <peterz@infradead.org>
Cc: Josh Don <joshdon@google.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Frederic Weisbecker <frederic@kernel.org>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Zhen Lei
2022-11-19 17:25:03 +08:00
committed by Greg Kroah-Hartman
parent 5562585c4a
commit a4935bb734
1 changed files with 1 additions and 1 deletions
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include/linux/kernel_stat.h
+1 -1
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@@ -73,7 +73,7 @@ extern unsigned int kstat_irqs_usr(unsigned int irq);
/* /*
* Number of interrupts per cpu, since bootup * Number of interrupts per cpu, since bootup
*/ */
static inline unsigned int kstat_cpu_irqs_sum(unsigned int cpu) static inline unsigned long kstat_cpu_irqs_sum(unsigned int cpu)
{ {
return kstat_cpu(cpu).irqs_sum; return kstat_cpu(cpu).irqs_sum;
} }