On Sun, Oct 23, 2022 at 10:32:08PM +0200, Jason A. Donenfeld wrote:

The RNG always mixes in the Linux version extremely early in boot. It
also always includes a cycle counter, not only during early boot, but
each and every time it is invoked prior to being fully initialized.
Together, this means that the use of additional xors inside of the
various stackprotector.h files is superfluous and over-complicated.
Instead, we can get exactly the same thing, but better, by just calling
`get_random_canary()`.

Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
---
 arch/arm/include/asm/stackprotector.h     |  9 +--------
 arch/arm64/include/asm/stackprotector.h   |  9 +--------

For arm64:

Acked-by: Catalin Marinas <catalin.marinas@arm.com>