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authorJason A. Donenfeld <Jason@zx2c4.com>2022-10-05 17:23:53 +0200
committerJason A. Donenfeld <Jason@zx2c4.com>2022-10-11 17:42:58 -0600
commitf743f16c548b1a2633e8b6034058d6475d7f26a3 (patch)
treec163930a1808d49fcb6bdcb897f88e3a7f8dc62e /net/sched
parent7e3cf0843fe505491baa05e355e83e6997e089dd (diff)
treewide: use get_random_{u8,u16}() when possible, part 2
Rather than truncate a 32-bit value to a 16-bit value or an 8-bit value, simply use the get_random_{u8,u16}() functions, which are faster than wasting the additional bytes from a 32-bit value. This was done by hand, identifying all of the places where one of the random integer functions was used in a non-32-bit context. Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Reviewed-by: Kees Cook <keescook@chromium.org> Reviewed-by: Yury Norov <yury.norov@gmail.com> Acked-by: Jakub Kicinski <kuba@kernel.org> Acked-by: Heiko Carstens <hca@linux.ibm.com> # for s390 Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Diffstat (limited to 'net/sched')
-rw-r--r--net/sched/sch_sfb.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/net/sched/sch_sfb.c b/net/sched/sch_sfb.c
index e2389fa3cff8..0366a1a029a9 100644
--- a/net/sched/sch_sfb.c
+++ b/net/sched/sch_sfb.c
@@ -379,7 +379,7 @@ static int sfb_enqueue(struct sk_buff *skb, struct Qdisc *sch,
goto enqueue;
}
- r = prandom_u32() & SFB_MAX_PROB;
+ r = get_random_u16() & SFB_MAX_PROB;
if (unlikely(r < p_min)) {
if (unlikely(p_min > SFB_MAX_PROB / 2)) {