[PATCH trivial] include/linux/huge_mm.h: Return NULL instead of false for pmd_trans_huge_lock()

[chengang]

From: Chen Gang <cheng...@emindsoft.com.cn>

The return value of pmd_trans_huge_lock() is a pointer, not a boolean
value, so use NULL instead of false as the return value.

Signed-off-by: Chen Gang <gang.chen.5...@gmail.com>
---
 include/linux/huge_mm.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/linux/huge_mm.h b/include/linux/huge_mm.h
index 79b0ef6..7008623 100644
--- a/include/linux/huge_mm.h
+++ b/include/linux/huge_mm.h
@@ -127,7 +127,7 @@ static inline spinlock_t *pmd_trans_huge_lock(pmd_t *pmd,
        if (pmd_trans_huge(*pmd) || pmd_devmap(*pmd))
                return __pmd_trans_huge_lock(pmd, vma);
        else
-               return false;
+               return NULL;
 }
 static inline int hpage_nr_pages(struct page *page)
 {
-- 
1.9.3