linux-kernel - powerpc asm-prototypes.h seems odd

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Date:   Tue, 27 Aug 2019 20:04:43 +0900
From:   Masahiro Yamada <yamada.masahiro@...ionext.com>
To:     Nicholas Piggin <npiggin@...il.com>,
        Michael Ellerman <mpe@...erman.id.au>,
        linuxppc-dev <linuxppc-dev@...ts.ozlabs.org>
Cc:     Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: powerpc asm-prototypes.h seems odd

Hi.

Lots of powerpc files include <asm/asm-prototypes.h>,
and powerpc is the only architecture that does this.

<asm/asm-prototypes.h> exists to support modversion for asm.
So, it is supposed to be parsed by genksysms, not to be
included from other files.  Right?


$  git grep  asm/asm-prototypes.h
arch/arm64/include/asm/asm-prototypes.h: * ... kbuild will
automatically pick these up from <asm/asm-prototypes.h> and
arch/powerpc/kernel/early_32.c:#include <asm/asm-prototypes.h>
arch/powerpc/kernel/irq.c:#include <asm/asm-prototypes.h>
arch/powerpc/kernel/machine_kexec_64.c:#include <asm/asm-prototypes.h>
arch/powerpc/kernel/process.c:#include <asm/asm-prototypes.h>
arch/powerpc/kernel/prom_init.c:#include <asm/asm-prototypes.h>
arch/powerpc/kernel/ptrace.c:#include <asm/asm-prototypes.h>
arch/powerpc/kernel/security.c:#include <asm/asm-prototypes.h>
arch/powerpc/kernel/setup_32.c:#include <asm/asm-prototypes.h>
arch/powerpc/kernel/signal_32.c:#include <asm/asm-prototypes.h>
arch/powerpc/kernel/signal_64.c:#include <asm/asm-prototypes.h>
arch/powerpc/kernel/smp.c:#include <asm/asm-prototypes.h>
arch/powerpc/kernel/syscalls.c:#include <asm/asm-prototypes.h>
arch/powerpc/kernel/tau_6xx.c:#include <asm/asm-prototypes.h>
arch/powerpc/kernel/time.c:#include <asm/asm-prototypes.h>
arch/powerpc/kernel/trace/ftrace.c:#include <asm/asm-prototypes.h>
arch/powerpc/kernel/traps.c:#include <asm/asm-prototypes.h>
arch/powerpc/kvm/book3s_emulate.c:#include <asm/asm-prototypes.h>
arch/powerpc/kvm/book3s_hv.c:#include <asm/asm-prototypes.h>
arch/powerpc/kvm/book3s_hv_builtin.c:#include <asm/asm-prototypes.h>
arch/powerpc/kvm/book3s_hv_rm_xive.c:#include <asm/asm-prototypes.h>
arch/powerpc/kvm/book3s_pr.c:#include <asm/asm-prototypes.h>
arch/powerpc/lib/vmx-helper.c:#include <asm/asm-prototypes.h>
arch/powerpc/mm/book3s64/hash_utils.c:#include <asm/asm-prototypes.h>
arch/powerpc/mm/book3s64/slb.c:#include <asm/asm-prototypes.h>
arch/powerpc/platforms/powernv/idle.c:#include <asm/asm-prototypes.h>
arch/powerpc/platforms/powernv/opal-call.c:#include <asm/asm-prototypes.h>
arch/powerpc/platforms/powernv/opal-tracepoints.c:#include
<asm/asm-prototypes.h>
arch/powerpc/platforms/pseries/lpar.c:#include <asm/asm-prototypes.h>
scripts/Makefile.build:# .S file exports must have their C prototypes
defined in asm/asm-prototypes.h
scripts/Makefile.build:     echo "\#include <asm/asm-prototypes.h>" ;
                            \
scripts/Makefile.build:ASM_PROTOTYPES := $(wildcard
$(srctree)/arch/$(SRCARCH)/include/asm/asm-prototypes.h)



-- 
Best Regards
Masahiro Yamada