zswap: change zpool/compressor at runtime

[firefly-linux-kernel-4.4.55.git] / mm / zsmalloc.c

diff --git a/mm/zsmalloc.c b/mm/zsmalloc.c
index ce08d043becd22dd65b832cd99d4a617dd53c3c0..f135b1b6fcdcab49aaf0845e078c6fc299b4b28b 100644 (file)
--- a/mm/zsmalloc.c
+++ b/mm/zsmalloc.c
@@ -288,8 +288,7 @@ static int create_handle_cache(struct zs_pool *pool)
 
 static void destroy_handle_cache(struct zs_pool *pool)
 {
-       if (pool->handle_cachep)
-               kmem_cache_destroy(pool->handle_cachep);
+       kmem_cache_destroy(pool->handle_cachep);
 }
 
 static unsigned long alloc_handle(struct zs_pool *pool)
@@ -312,7 +311,8 @@ static void record_obj(unsigned long handle, unsigned long obj)
 
 #ifdef CONFIG_ZPOOL
 
-static void *zs_zpool_create(char *name, gfp_t gfp, struct zpool_ops *zpool_ops,
+static void *zs_zpool_create(char *name, gfp_t gfp,
+                            const struct zpool_ops *zpool_ops,
                             struct zpool *zpool)
 {
        return zs_create_pool(name, gfp);
@@ -1710,8 +1710,6 @@ static struct page *isolate_source_page(struct size_class *class)
  *
  * Based on the number of unused allocated objects calculate
  * and return the number of pages that we can free.
- *
- * Should be called under class->lock.
  */
 static unsigned long zs_can_compact(struct size_class *class)
 {
@@ -1834,9 +1832,7 @@ static unsigned long zs_shrinker_count(struct shrinker *shrinker,
                if (class->index != i)
                        continue;
 
-               spin_lock(&class->lock);
                pages_to_free += zs_can_compact(class);
-               spin_unlock(&class->lock);
        }
 
        return pages_to_free;