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Date:   Fri, 14 Feb 2020 20:47:23 +0000
From:   Jules Irenge <>
Cc:, Jules Irenge <>,
        Minchan Kim <>,
        Nitin Gupta <>,
        Sergey Senozhatsky <>,
        Andrew Morton <>, (open list:ZSMALLOC COMPRESSED SLAB MEMORY ALLOCATOR)
Subject: [PATCH 12/30] mm/zsmalloc: Add missing annotation for pin_tag()

Sparse reports a warning at pin_tag()()

warning: context imbalance in pin_tag() - wrong count at exit

The root cause is the missing annotation at pin_tag()
Add the missing __acquires(bitlock) annotation

Signed-off-by: Jules Irenge <>
 mm/zsmalloc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mm/zsmalloc.c b/mm/zsmalloc.c
index 2eab424c8c67..7bac76ae11b3 100644
--- a/mm/zsmalloc.c
+++ b/mm/zsmalloc.c
@@ -891,7 +891,7 @@ static inline int trypin_tag(unsigned long handle)
 	return bit_spin_trylock(HANDLE_PIN_BIT, (unsigned long *)handle);
-static void pin_tag(unsigned long handle)
+static void pin_tag(unsigned long handle) __acquires(bitlock)
 	bit_spin_lock(HANDLE_PIN_BIT, (unsigned long *)handle);

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