[045/192] mm/page-writeback: use __this_cpu_inc() in account_page_dirtied()

Commit Message

Andrew Morton June 29, 2021, 2:35 a.m. UTC

From: Chi Wu <[e-mail]>
Subject: mm/page-writeback: use __this_cpu_inc() in account_page_dirtied()

As account_page_dirtied() was always protected by xa_lock_irqsave(), so
using __this_cpu_inc() is better.

Link: https://lkml.kernel.org/r/[e-mail]
Signed-off-by: Chi Wu <[e-mail]>
Reviewed-by: Jan Kara <[e-mail]>
Cc: Howard Cochran <[e-mail]>
Cc: Miklos Szeredi <[e-mail]>
Cc: Sedat Dilek <[e-mail]>
Cc: Tejun Heo <[e-mail]>
Signed-off-by: Andrew Morton <[e-mail]>
---

 mm/page-writeback.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Patch

--- a/mm/page-writeback.c~mm-page-writeback-use-__this_cpu_inc-in-account_page_dirtied
+++ a/mm/page-writeback.c
@@ -2445,7 +2445,7 @@  void account_page_dirtied(struct page *p
 		inc_wb_stat(wb, WB_DIRTIED);
 		task_io_account_write(PAGE_SIZE);
 		current->nr_dirtied++;
-		this_cpu_inc(bdp_ratelimits);
+		__this_cpu_inc(bdp_ratelimits);
 
 		mem_cgroup_track_foreign_dirty(page, wb);
 	}