From: Huang Shijie <sjhuang@xxxxxxxxxxx> 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@xxxxxxxxxxx Signed-off-by: Huang Shijie <sjhuang@xxxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- 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; _
