[PATCH] lib/find: optimize find_*_bit_wrap

[Yury Norov <yury.norov@gmail.com>]

When an offset is 0, there's no need to search a bitmap from the
beginning after the 1st search failed, because each bit has already
been tested.

Signed-off-by: Yury Norov <yury.norov@gmail.com>
---
 include/linux/find.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/include/linux/find.h b/include/linux/find.h
index 5e4f39ef2e72..241b6d028eda 100644
--- a/include/linux/find.h
+++ b/include/linux/find.h
@@ -405,7 +405,7 @@ unsigned long find_next_and_bit_wrap(const unsigned long *addr1,
 {
 	unsigned long bit = find_next_and_bit(addr1, addr2, size, offset);
 
-	if (bit < size)
+	if (bit < size || offset == 0)
 		return bit;
 
 	bit = find_first_and_bit(addr1, addr2, offset);
@@ -427,7 +427,7 @@ unsigned long find_next_bit_wrap(const unsigned long *addr,
 {
 	unsigned long bit = find_next_bit(addr, size, offset);
 
-	if (bit < size)
+	if (bit < size || offset == 0)
 		return bit;
 
 	bit = find_first_bit(addr, offset);
-- 
2.39.2