Re: [Buildroot] [PATCH] package/ebtables: fix arm64 build with kernel headers >= 7.3

[Thomas Petazzoni via buildroot <buildroot@buildroot.org>]

On Sat, Oct 24, 2026 at 06:17:04PM +0200, Yegor Yefremov via buildroot wrote:
> With kernel headers 7.3, ebtables fails to build on arm64:
> 
>   [...]/sysroot/usr/include/asm/sigcontext.h:81:9: error: unknown type name '__u128'; did you mean '__u32'?
> 
> Linux 7.3 changed arm64's asm/sigcontext.h to use the __u128 type from
> linux/types.h. ebtables bundles an old copy of linux/types.h, lacking
> __u128, which shadows the one from the kernel headers.
> 
> Backport the upstream commit dropping the bundled copy. ebtables only
> needs __be16 and __be32 from it, which all supported kernel headers
> provide.
> 
> This issue has been present since commit b216661a73f7
> ("{toolchain, linux-headers}: add support for 7.3 headers"), which made
> 7.3 the latest kernel headers version. It only affects master, no
> release or maintenance branch has 7.3 headers.
> 
> Fixes: b216661a73f7b8e21290a1bc9033e7f9b5fb230e ("{toolchain, linux-headers}: add support for 7.3 headers")
> Assisted-by: Claude:claude-opus-5-5
> Signed-off-by: Yegor Yefremov <yegorslists@googlemail.com>

And is the "opposite" still working, i.e building with really old
kernel headers? Maybe they lack something that the bundled copy had,
and it was the reason for this bundled copy in the first place?

Best regards,

Thomas Petazzoni
-- 
Thomas Petazzoni, co-owner and CEO, Bootlin
Embedded Linux and Kernel engineering and training
https://bootlin.com
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