Le 21/06/2022 à 16:08, Jason A. Donenfeld a écrit :
The platform's RNG must be available before random_init() in order to be useful for initial seeding, which in turn means that it needs to be called from setup_arch(), rather than from an init call. Fortunately, each platform already has a setup_arch function pointer, which means we can wire it up that way. Complicating things, however, is that POWER8 systems need some per-cpu state and kmalloc, which isn't available at this stage. So we split things up into an early phase and a later opportunistic phase. This commit also removes some noisy log messages that don't add much.
Regarding the kmalloc(), I have not looked at it in details, but usually you can use memblock_alloc() when kmalloc is not available yet.
Christophe