From: Guo Zhengkui <guozhengkui@vivo.com>

Date: Tue, 9 Nov 2021 15:50:51 +0800

Subject: ACPI: processor idle: Use swap() instead of open coding it

Patch-mainline: v5.17-rc1

Git-commit: 0e6078c3c6737df7d0bd0c890fbadf24a27fffbb

References: jsc#PED-1408

Address the following coccicheck warning:

./drivers/net/ethernet/mellanox/mlx5/core/en/tc_ct.c:914:40-41:

WARNING opportunity for swap().

by using swap() for the swapping of variable values and drop

the tmp variable that is not needed any more.

Signed-off-by: Guo Zhengkui <guozhengkui@vivo.com>

[ rjw: Subject and changelog rewrite ]

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

Acked-by: Lee, Chun-Yi <jlee@suse.com>

---

 drivers/acpi/processor_idle.c |    6 ++----

 1 file changed, 2 insertions(+), 4 deletions(-)

--- a/drivers/acpi/processor_idle.c

+++ b/drivers/acpi/processor_idle.c

@@ -20,6 +20,7 @@

 #include <linux/tick.h>

 #include <linux/cpuidle.h>

 #include <linux/cpu.h>

+#include <linux/minmax.h>

 #include <acpi/processor.h>

 /*

@@ -400,13 +401,10 @@ static int acpi_cst_latency_cmp(const vo

 static void acpi_cst_latency_swap(void *a, void *b, int n)

 {

 	struct acpi_processor_cx *x = a, *y = b;

-	u32 tmp;

 	if (!(x->valid && y->valid))

 		return;

-	tmp = x->latency;

-	x->latency = y->latency;

-	y->latency = tmp;

+	swap(x->latency, y->latency);

 }

 static int acpi_processor_power_verify(struct acpi_processor *pr)