linux-kernel - [PATCH 17/30] mm/zsmalloc: Add missing annotation for zs_map

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Date:   Sun, 23 Feb 2020 23:16:58 +0000
From:   Jules Irenge <jbi.octave@...il.com>
To:     boqun.feng@...il.com
Cc:     jbi.octave@...il.com, linux-kernel@...r.kernel.org,
        Minchan Kim <minchan@...nel.org>,
        Nitin Gupta <ngupta@...are.org>,
        Sergey Senozhatsky <sergey.senozhatsky.work@...il.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        linux-mm@...ck.org (open list:ZSMALLOC COMPRESSED SLAB MEMORY ALLOCATOR)
Subject: [PATCH 17/30] mm/zsmalloc: Add missing annotation for zs_map_object()

Sparse reports a warning at zs_map_object()
context imbalance in zs_map_object() - wrong count at exit
The root cause is the missing annotation at zs_map_object()
Add the missing __acquires(zspage)

Signed-off-by: Jules Irenge <jbi.octave@...il.com>
---
 mm/zsmalloc.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/mm/zsmalloc.c b/mm/zsmalloc.c
index 2aa2d524a343..9d3f9b3d22aa 100644
--- a/mm/zsmalloc.c
+++ b/mm/zsmalloc.c
@@ -1290,6 +1290,7 @@ EXPORT_SYMBOL_GPL(zs_get_total_pages);
  */
 void *zs_map_object(struct zs_pool *pool, unsigned long handle,
 			enum zs_mapmode mm)
+	__acquires(zspage)
 {
 	struct zspage *zspage;
 	struct page *page;
-- 
2.24.1