linux-kernel - Re: [PATCH v2 3/4] Provide the always inline version of some functions

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Message-ID: <20251109113152.GA2545891@noisy.programming.kicks-ass.net>
Date: Sun, 9 Nov 2025 12:31:52 +0100
From: Peter Zijlstra <peterz@...radead.org>
To: Xie Yuanbin <qq570070308@...il.com>
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Subject: Re: [PATCH v2 3/4] Provide the always inline version of some
 functions

On Sun, Nov 09, 2025 at 01:23:45AM +0800, Xie Yuanbin wrote:
> On critical hot code paths, inline functions can optimize performance.
> However, for current compilers, there is no way to request them to inline
> at a specific calling point of a function.
> 
> Add a always inline version to some functions, so that they can be chosen
> when called in hot paths.

There isn't a single function in the entire kernel with an _ainline
suffix, while there are a ton of _inline suffixed functions.

On top of that, this function was already marked inline, and your
compiler just chose to not inline them for raisins. Just make the thing
__always_inline and forget, dont make thing extra ugly for no reason.