[patch 084/166] mm/zsmalloc: add missing annotation for pin_tag()

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From: Jules Irenge <jbi.octave@xxxxxxxxx>
Subject: 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

Link: http://lkml.kernel.org/r/20200214204741.94112-13-jbi.octave@xxxxxxxxx
Signed-off-by: Jules Irenge <jbi.octave@xxxxxxxxx>
Acked-by: Minchan Kim <minchan@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---

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

--- a/mm/zsmalloc.c~mm-zsmalloc-add-missing-annotation-for-pin_tag
+++ a/mm/zsmalloc.c
@@ -891,7 +891,7 @@ static inline int trypin_tag(unsigned lo
 	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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