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x86 asm/setup.h includes linux/kexec_handover.h. This is because it is
used by setup.c and kaslr.c. But this inclusion is problematic. The
header is included in many places, so it results in the KHO header being
propagated there. Also, the setup header is used by realmode code. If
KHO header includes things like mm.h, it causes a big dump of
compilation failures.
Nothing in setup.h uses anything from KHO. Remove the header from
setup.h, and directly include it in setup.c. which does use things from
KHO. Since kaslr.c is a part of the decompressor, avoid including linux
headers there directly. Instead, split out struct kho_scratch, which is
the only thing the kaslr.c uses, and move it to
include/asm-generic/kexec_handover.h.
This should also help reduce files recompiled when kexec_handover.h
changes.
Signed-off-by: Pratyush Yadav (Google) <pratyush@kernel.org>
Acked-by: Borislav Petkov (AMD) <bp@alien8.de>
Link: https://patch.msgid.link/20260706153751.1166003-1-pratyush@kernel.org
Signed-off-by: Mike Rapoport (Microsoft) <rppt@kernel.org>
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