This is a kbuild bug.
The top-level Makefile creates the include2/asm symlink only
if the file$(srctree)/include/asm-$ARCH/errno.h is present.
And you moved errno.h when you committed your changes so symlink
is not created anymore thus it fails.
But this is oly with "make O=..." builds which I think kautobuild
does not use (since it did not trigger the bug).
I cannot recall the exact reason why I did this check before
creating the symlink so I will simply create it always.
Sam
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