Messages in this thread | | | Date | Mon, 9 Jan 2023 17:28:32 +0100 | From | Peter Zijlstra <> | Subject | Re: [RFC][PATCH 11/12] slub: Replace cmpxchg_double() |
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On Tue, Jan 03, 2023 at 11:08:29AM -0800, Linus Torvalds wrote:
> But I *do* note that this patch seems to be the only one that depends > on the new this_cpu_cmpxchg() updates to make it just automatically do > the right thing for a 128-bit value. And I have to admit that all > those games with __pcpu_cast_128() make no sense to me. Why isn't it > just using "u128" everywhere without any odd _Generic() games?
I ran into a ton of casting trouble when compiling kernel/fork.c which uses this_cpu_cmpxchg() on a pointer type and the compiler hates casting pointers to an integer that is not the exact same size.
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