linux-stable/arch/arm/include
Jason A. Donenfeld 197d25e068 arm: use fallback for random_get_entropy() instead of zero
commit ff8a8f59c9 upstream.

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.

Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-05-30 09:29:14 +02:00
..
asm arm: use fallback for random_get_entropy() instead of zero 2022-05-30 09:29:14 +02:00
debug ARM: imx: rename DEBUG_IMX21_IMX27_UART to DEBUG_IMX27_UART 2022-01-27 11:04:29 +01:00
uapi/asm ARM development updates for 5.15: 2021-09-09 13:25:49 -07:00