From: Zhen Lei thunder.leizhen@huawei.com
[ Upstream commit 47904aed898a08f028572b9b5a5cc101ddfb2d82 ]
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: f2c66cd8eedd ("/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 --- include/linux/kernel_stat.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/include/linux/kernel_stat.h b/include/linux/kernel_stat.h index 7ee2bb43b251a..f7f20cf1bd3b1 100644 --- a/include/linux/kernel_stat.h +++ b/include/linux/kernel_stat.h @@ -73,7 +73,7 @@ extern unsigned int kstat_irqs_usr(unsigned int irq); /* * 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; }