]> git.baikalelectronics.ru Git - kernel.git/commit
um: use fallback for random_get_entropy() instead of zero
authorJason A. Donenfeld <Jason@zx2c4.com>
Fri, 8 Apr 2022 16:03:13 +0000 (18:03 +0200)
committerJason A. Donenfeld <Jason@zx2c4.com>
Fri, 13 May 2022 21:59:23 +0000 (23:59 +0200)
commit8b64df115e9581d7bb0c8ab528b1a0c3ace12137
tree6c185b59fdd4d8e536f799ad4bef6366cc9f88ef
parent106f4f320497e0cb950ea28eb5180b7dc62a4106
um: use fallback for random_get_entropy() instead of zero

In the event that random_get_entropy() can't access a cycle counter or
similar, falling back to returning 0 is really not the best we can do.
Instead, at least calling random_get_entropy_fallback() would be
preferable, because that always needs to return _something_, even
falling back to jiffies eventually. It's not as though
random_get_entropy_fallback() is super high precision or guaranteed to
be entropic, but basically anything that's not zero all the time is
better than returning zero all the time.

This is accomplished by just including the asm-generic code like on
other architectures, which means we can get rid of the empty stub
function here.

Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Richard Weinberger <richard@nod.at>
Cc: Anton Ivanov <anton.ivanov@cambridgegreys.com>
Acked-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
arch/um/include/asm/timex.h