Re: Simplify load_unaligned_zeropad() (was Re: [GIT PULL] Ceph updates for 5.20-rc1)

From: Peter Zijlstra
Date: Mon Aug 15 2022 - 19:39:55 EST


On Mon, Aug 15, 2022 at 08:58:21AM -0700, Linus Torvalds wrote:
> And no, disassembling the instruction wouldn't kill us either (we know
> it's a "mov" instruction, so it's just the modrm bytes), but again it
> really didn't seem worth the pain. The generated code with the fixed
> registers wasn't optimal, but it was close enough that it really
> doesn't seem to matter.

I'm not at all suggesting we do this; but it might be
insn_get_addr_ref() does what is needed.