w1: w1_therm: use swap() to make code cleaner

Use the macro 'swap()' defined in 'include/linux/minmax.h' to avoid
opencoding it.

Reported-by: Zeal Robot <zealci@zte.com.cn>
Signed-off-by: David Yang <davidcomponentone@gmail.com>
Signed-off-by: Yang Guang <yang.guang5@zte.com.cn>
Link: https://lore.kernel.org/r/cb14f9e6e86cf8494ed2ddce6eec8ebd988908d9.1640077704.git.yang.guang5@zte.com.cn
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/w1/slaves/w1_therm.c b/drivers/w1/slaves/w1_therm.c
index ca70c5f032060535eb361d643d9b39717b3684c7..565578002d79ec81f1169724520e2805d4d084c3 100644 (file)
--- a/drivers/w1/slaves/w1_therm.c
+++ b/drivers/w1/slaves/w1_therm.c
@@ -1785,7 +1785,7 @@ static ssize_t alarms_store(struct device *device,
        u8 new_config_register[3];      /* array of data to be written */
        int temp, ret;
        char *token = NULL;
-       s8 tl, th, tt;  /* 1 byte per value + temp ring order */
+       s8 tl, th;      /* 1 byte per value + temp ring order */
        char *p_args, *orig;
 
        p_args = orig = kmalloc(size, GFP_KERNEL);
@@ -1836,9 +1836,8 @@ static ssize_t alarms_store(struct device *device,
        th = int_to_short(temp);
 
        /* Reorder if required th and tl */
-       if (tl > th) {
-               tt = tl; tl = th; th = tt;
-       }
+       if (tl > th)
+               swap(tl, th);
 
        /*
         * Read the scratchpad to change only the required bits