[patch 20/38] kasan: sw_tags: Replace get_cycles() by random_get_entropy()

Thomas Gleixner
2026-04-10T12:21:00Z

Seeding the random state with get_cycles() is functionally equivalent on
the architectures which provide get_cycles(), but it does not make sense
semantically.

Use random_get_entropy() instead, which is the proper interface.

This is part of a larger effort to remove get_cycles() usage from
non-architecture code.

Signed-off-by: Thomas Gleixner <tglx@kernel.org>
Cc: Andrey Ryabinin <ryabinin.a.a@gmail.com>
Cc: kasan-dev@googlegroups.com
---
mm/kasan/sw_tags.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

--- a/mm/kasan/sw_tags.c
+++ b/mm/kasan/sw_tags.c
@@ -41,7 +41,7 @@ void __init kasan_init_sw_tags(void)
int cpu;

for_each_possible_cpu(cpu)
- per_cpu(prng_state, cpu) = (u32)get_cycles();
+ per_cpu(prng_state, cpu) = (u32)random_get_entropy();

kasan_init_tags();
kasan_enable();