Re: [RFC PATCH v1 2/9] uaccess: Convert INLINE_COPY_{TO/FROM}_USER to kconfig and reduce ifdefery

Yury Norov <[email protected]> Mon, 27 Apr 2026 14:39:16 -0400
Newsgroups gmane.comp.freedesktop.xorg.drivers.intel,gmane.linux.ports.alpha,gmane.linux.kernel,gmane.linux.kernel.arc,gmane.linux.ports.arm.kernel,gmane.linux.ports.mips,gmane.linux.ports.ppc64.devel,gmane.comp.emulators.kvm.devel,gmane.linux.ports.riscv,gmane.linux.ports.sparc,gmane.linux.uml.devel,gmane.linux.kernel.efi,gmane.comp.freedesktop.amd-gfx,gmane.comp.video.dri.devel,gmane.linux.network,gmane.linux.kernel.wireless.general,gmane.linux.kernel.spi.devel,gmane.linux.drivers.video-input-infrastructure,gmane.linux.serial,gmane.linux.usb.general,gmane.comp.emulators.xen.devel,gmane.linux.file-systems,gmane.linux.kernel.bpf,gmane.linux.kernel.mm,gmane.linux.x25,gmane.linux.kernel.rust,gmane.linux.sound,gmane.linux.ports.hexagon,gmane.linux.ports.parisc,gmane.linux.ports.sh.devel,gmane.linux.kernel.cross-arch
Message-ID <ae-tVFVfx72oCC_i@yury> 
On Mon, Apr 27, 2026 at 07:13:43PM +0200, Christophe Leroy (CS GROUP) wrote:
> Among the 21 architectures supported by the kernel, 16 define both
> INLINE_COPY_TO_USER and INLINE_COPY_FROM_USER while the 5 other ones
> don't define any of the two.
> 
> To simplify and reduce risk of mistakes, convert them to a single
> kconfig item named CONFIG_ARCH_WANTS_NOINLINE_COPY which will be

We've got a special word for it: outline. Can you name it
CONFIG_OUTLINE_USERCOPY, or similar?

> selected by the 5 architectures that don't want inlined copy.
> 
> To minimise complication in a later patch, also remove
> ifdefery and replace it with IS_ENABLED().
> 
> Signed-off-by: Christophe Leroy (CS GROUP) <[email protected]>

Andrew has taken my consolidation patch for INLINE_COPY_USER:

https://lore.kernel.org/all/[email protected]/

Please base your series on top of it.

I'm not sure this patch is relevant to the goal of your series. Maybe
send it separately?

Thanks,
Yury