Re: [PATCH v3 5/6] x86: alternative.h: use asm_inline for all alternative variants
From: Ingo Molnar
Date: Fri Sep 13 2019 - 01:51:06 EST
* Rasmus Villemoes <linux@xxxxxxxxxxxxxxxxxx> wrote:
> Most, if not all, uses of the alternative* family just provide one or
> two instructions in .text, but the string literal can be quite large,
> causing gcc to overestimate the size of the generated code. That in
> turn affects its decisions about inlining of the function containing
> the alternative() asm statement.
> New enough versions of gcc allow one to overrule the estimated size by
> using "asm inline" instead of just "asm". So replace asm by the helper
> asm_inline, which for older gccs just expands to asm.
> Signed-off-by: Rasmus Villemoes <linux@xxxxxxxxxxxxxxxxxx>
Acked-by: Ingo Molnar <mingo@xxxxxxxxxx>