linux-kernel - [PATCH v2] lib: optimize cpumask_next

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Message-Id: <20171026155201.26104-1-courbet@google.com>
Date:   Thu, 26 Oct 2017 17:52:01 +0200
From:   Clement Courbet <courbet@...gle.com>
To:     Arnd Bergmann <arnd@...db.de>,
        Rasmus Villemoes <linux@...musvillemoes.dk>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Matthew Wilcox <mawilcox@...rosoft.com>,
        Yury Norov <ynorov@...iumnetworks.com>
Cc:     Clement Courbet <courbet@...gle.com>,
        Ingo Molnar <mingo@...nel.org>, linux-arch@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH v2] lib: optimize cpumask_next_and()

Hi Alexey,

> Gentoo ships 5.4.0 which doesn't inline this code on x86_64 defconfig
> (which has OPTIMIZE_INLINING).

I have not actually marked _find_next_bit() inline, it just turns out
that my compiler inlines it.
I've tried out marking the function inline and OPTIMIZE_INLINING does
not un-inline it. I'll send a v4 with an explicit inine.