[PATCH] Fix sparse checks processing

[Tom Rini]

On Fri, May 05, 2023 at 10:39:39AM +0200, Christophe Leroy wrote:

> A lot of errors are encountered when building with sparse checking
> activated (make C=1 or make C=2).
> 
> Many of them are fixed in Linux.
> 
> Resynchronise Makefile and include/linux/build_bug.h with Linux
> kernel sources by porting the following Linux commits into u-boot:
> - 6c49f359ca14 ("kbuild: disable sparse warnings about unknown attributes")
> - 80591e61a0f7 ("kbuild: tell sparse about the $ARCH")
> - 8788994376d8 ("linux/build_bug.h: change type to int")
> - 527edbc18a70 ("build_bug.h: remove most of dummy BUILD_BUG_ON stubs for Sparse")
> - c60d3b79423a ("build_bug.h: remove negative-array fallback for BUILD_BUG_ON()")
> - 14e83077d55f ("include: drop pointless __compiler_offsetof indirection")
> 
> Also revert commit aa9e891c63 ("include/linux/stddef.h: avoid
> 'warning: preprocessor token offsetof redefined'") because the
> error it creates is worse than the warning it is trying to fix.
> 
> Signed-off-by: Christophe Leroy <christophe.leroy at csgroup.eu>

First, I've applied to u-boot/next now.  But second, I had mentioned CI
testing too, but seeing the level of checker-error output on qemu-arm I
am reluctant to add a test that should build-to-completion but error so
much as I worry about it being seen as a low quality test.

-- 
Tom
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