zsmalloc: remove synchronize_rcu from zs_compact()

Do not synchronize rcu in zs_compact(). Neither zsmalloc not
zram use rcu.

Signed-off-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Acked-by: Minchan Kim <minchan@kernel.org>
Cc: Nitin Gupta <ngupta@vflare.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/mm/zsmalloc.c b/mm/zsmalloc.c
index 7a48e55..8705a01 100644 (file)
--- a/mm/zsmalloc.c
+++ b/mm/zsmalloc.c
@@ -1778,8 +1778,6 @@ unsigned long zs_compact(struct zs_pool *pool)
                nr_migrated += __zs_compact(pool, class);
        }
 
-       synchronize_rcu();
-
        return nr_migrated;
 }
 EXPORT_SYMBOL_GPL(zs_compact);