From: Huang Shijie Date: Fri, 26 Feb 2021 01:21:17 +0000 (-0800) Subject: lib/genalloc.c: change return type to unsigned long for bitmap_set_ll X-Git-Tag: v5.12-rc1-dontuse~27^2~26 X-Git-Url: https://git.kernel.dk/?a=commitdiff_plain;h=0e24465d3313832e82f8bd9ee2439da1367dd2e5;p=linux-2.6-block.git 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 Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- diff --git a/lib/genalloc.c b/lib/genalloc.c index dab97bb69df6..5dcf9cdcbc46 100644 --- a/lib/genalloc.c +++ b/lib/genalloc.c @@ -81,7 +81,8 @@ static int clear_bits_ll(unsigned long *addr, unsigned long mask_to_clear) * 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;