Re: [PATCH] pstore: Convert buf_lock to semaphore

[Sebastian Andrzej Siewior]

On 2018-12-04 09:23:13 [-0800], Kees Cook wrote:
> Okay, so, if kmsg_dump() uses rcu_read_lock(), that means efi-pstore
> can _never_ sleep, and it's nothing to do with pstore internals. :( I
> guess we just hard-code it, then? And efi-pstore should probably only
> attach to pstore if it has a nonblock implementation (and warn if one
> isn't available).

I was about to suggest that. I am not aware if anything else could use
efi_pstore_write() use that but otherwise you could hardcode it.

> -Kees
> 
Sebastian