mm/vmstat.c: use helper macro abs()

Use helper macro abs() to simplify the "x > t || x < -t" cmp.

Signed-off-by: Miaohe Lin <linmiaohe@huawei.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Link: https://lkml.kernel.org/r/20200905084008.15748-1-linmiaohe@huawei.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/mm/vmstat.c b/mm/vmstat.c
index 4f7b4ee6aa123cdf10138e7500ea98edcd98f6de..698bc0bc18d146942151348bac4012dea31b09bb 100644 (file)
--- a/mm/vmstat.c
+++ b/mm/vmstat.c
@@ -325,7 +325,7 @@ void __mod_zone_page_state(struct zone *zone, enum zone_stat_item item,
 
        t = __this_cpu_read(pcp->stat_threshold);
 
-       if (unlikely(x > t || x < -t)) {
+       if (unlikely(abs(x) > t)) {
                zone_page_state_add(x, zone, item);
                x = 0;
        }
@@ -350,7 +350,7 @@ void __mod_node_page_state(struct pglist_data *pgdat, enum node_stat_item item,
 
        t = __this_cpu_read(pcp->stat_threshold);
 
-       if (unlikely(x > t || x < -t)) {
+       if (unlikely(abs(x) > t)) {
                node_page_state_add(x, pgdat, item);
                x = 0;
        }
@@ -511,7 +511,7 @@ static inline void mod_zone_state(struct zone *zone,
                o = this_cpu_read(*p);
                n = delta + o;
 
-               if (n > t || n < -t) {
+               if (abs(n) > t) {
                        int os = overstep_mode * (t >> 1) ;
 
                        /* Overflow must be added to zone counters */
@@ -573,7 +573,7 @@ static inline void mod_node_state(struct pglist_data *pgdat,
                o = this_cpu_read(*p);
                n = delta + o;
 
-               if (n > t || n < -t) {
+               if (abs(n) > t) {
                        int os = overstep_mode * (t >> 1) ;
 
                        /* Overflow must be added to node counters */