[PATCH v3] Staging: lustre: Use of fls to find last set bit

[Monam Agarwal]

This introduces fls in lustre/ldlm/ldlm_extent.c
to find the last set bit.

Signed-off-by: Monam Agarwal <monamagarwal123 at gmail.com>
---
Changes since v1:
* Incorrect commit message
* Use of fls function
Changes since v2:
* Removal of extra variable

 drivers/staging/lustre/lustre/ldlm/ldlm_extent.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/staging/lustre/lustre/ldlm/ldlm_extent.c b/drivers/staging/lustre/lustre/ldlm/ldlm_extent.c
index ac5d66a..a4f382d 100644
--- a/drivers/staging/lustre/lustre/ldlm/ldlm_extent.c
+++ b/drivers/staging/lustre/lustre/ldlm/ldlm_extent.c
@@ -153,7 +153,7 @@ static inline int lock_mode_to_index(ldlm_mode_t mode)
 
 	LASSERT(mode != 0);
 	LASSERT(IS_PO2(mode));
-	for (index = -1; mode; index++, mode >>= 1) ;
+	index = fls(mode)-1;
 	LASSERT(index < LCK_MODE_NUM);
 	return index;
 }
-- 
1.7.9.5