[PATCH] mm/memcontrol: remove unused memcg parameter in calculate_high_delay()

[Hongfu Li]

From: Hongfu Li <lihongfu@xxxxxxxxxx>

The memcg argument of calculate_high_delay() is never referenced in
its function body. The delay calculation only depends on nr_pages
and max_overage, and both callers have already obtained max_overage
from the same memcg.

Drop this unused parameter and update the two call sites inside
__mem_cgroup_handle_over_high().

Signed-off-by: Hongfu Li <lihongfu@xxxxxxxxxx>
---
 mm/memcontrol.c | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index 11b85f4b6828..8bdb6988e7f0 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -2515,8 +2515,7 @@ static u64 swap_find_max_overage(struct mem_cgroup *memcg)
  * Get the number of jiffies that we should penalise a mischievous cgroup which
  * is exceeding its memory.high by checking both it and its ancestors.
  */
-static unsigned long calculate_high_delay(struct mem_cgroup *memcg,
-					  unsigned int nr_pages,
+static unsigned long calculate_high_delay(unsigned int nr_pages,
 					  u64 max_overage)
 {
 	unsigned long penalty_jiffies;
@@ -2594,10 +2593,10 @@ void __mem_cgroup_handle_over_high(gfp_t gfp_mask)
 	 * memory.high is breached and reclaim is unable to keep up. Throttle
 	 * allocators proactively to slow down excessive growth.
 	 */
-	penalty_jiffies = calculate_high_delay(memcg, nr_pages,
+	penalty_jiffies = calculate_high_delay(nr_pages,
 					       mem_find_max_overage(memcg));
 
-	penalty_jiffies += calculate_high_delay(memcg, nr_pages,
+	penalty_jiffies += calculate_high_delay(nr_pages,
 						swap_find_max_overage(memcg));
 
 	/*
-- 
2.54.0