From: Huang Shijie <redacted>
Subject: lib/genalloc.c: change return type to unsigned long for bitmap_set_ll

Just as bitmap_clear_ll(), change return type to unsigned long
for bitmap_set_ll to avoid the possible overflow in future.

Link: https://lkml.kernel.org/r/20210105031644.2771-1-sjhuang@iluvatar.ai
Signed-off-by: Huang Shijie <redacted>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 lib/genalloc.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

--- a/lib/genalloc.c~lib-genalloc-change-return-type-to-unsigned-long-for-bitmap_set_ll
+++ a/lib/genalloc.c

@@ -81,7 +81,8 @@ static int clear_bits_ll(unsigned long *
  * users set the same bit, one user will return remain bits, otherwise
  * return 0.
  */
-static int bitmap_set_ll(unsigned long *map, unsigned long start, unsigned long nr)
+static unsigned long
+bitmap_set_ll(unsigned long *map, unsigned long start, unsigned long nr)
 {
 	unsigned long *p = map + BIT_WORD(start);
 	const unsigned long size = start + nr;

_