linux-kernel - Re: [PATCH 11/14] init: consolidate prototypes in linux/init.h

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Date:   Thu, 22 Jun 2023 08:02:09 -0700 (PDT)
From:   Palmer Dabbelt <palmer@...belt.com>
To:     arnd@...nel.org
CC:     akpm@...ux-foundation.org, linux-mm@...ck.org,
        Arnd Bergmann <arnd@...db.de>, linux@...linux.org.uk,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>, monstr@...str.eu,
        tsbogend@...ha.franken.de, deller@....de, mpe@...erman.id.au,
        hca@...ux.ibm.com, tglx@...utronix.de, mingo@...hat.com,
        x86@...nel.org, rafael@...nel.org, paul@...l-moore.com,
        eparis@...hat.com, dennis@...nel.org, tj@...nel.org, cl@...ux.com,
        pavel@....cz, peterz@...radead.org, longman@...hat.com,
        boqun.feng@...il.com, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, linux-mips@...r.kernel.org,
        linux-parisc@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org,
        linux-riscv@...ts.infradead.org, linux-s390@...r.kernel.org,
        linux-sh@...r.kernel.org, audit@...r.kernel.org,
        linux-pm@...r.kernel.org, linux-kselftest@...r.kernel.org,
        kunit-dev@...glegroups.com
Subject:     Re: [PATCH 11/14] init: consolidate prototypes in linux/init.h

On Wed, 17 May 2023 06:10:59 PDT (-0700), arnd@...nel.org wrote:
> From: Arnd Bergmann <arnd@...db.de>
>
> The init/main.c file contains some extern declarations for functions
> defined in architecture code, and it defines some other functions that
> are called from architecture code with a custom prototype. Both of those
> result in warnings with 'make W=1':
>
> init/calibrate.c:261:37: error: no previous prototype for 'calibrate_delay_is_known' [-Werror=missing-prototypes]
> init/main.c:790:20: error: no previous prototype for 'mem_encrypt_init' [-Werror=missing-prototypes]
> init/main.c:792:20: error: no previous prototype for 'poking_init' [-Werror=missing-prototypes]
> arch/arm64/kernel/irq.c:122:13: error: no previous prototype for 'init_IRQ' [-Werror=missing-prototypes]
> arch/arm64/kernel/time.c:55:13: error: no previous prototype for 'time_init' [-Werror=missing-prototypes]
> arch/x86/kernel/process.c:935:13: error: no previous prototype for 'arch_post_acpi_subsys_init' [-Werror=missing-prototypes]
> init/calibrate.c:261:37: error: no previous prototype for 'calibrate_delay_is_known' [-Werror=missing-prototypes]
> kernel/fork.c:991:20: error: no previous prototype for 'arch_task_cache_init' [-Werror=missing-prototypes]
>
> Add prototypes for all of these in include/linux/init.h or another
> appropriate header, and remove the duplicate declarations from
> architecture specific code.
>
> Signed-off-by: Arnd Bergmann <arnd@...db.de>
> ---
>  arch/arm/include/asm/irq.h          |  1 -
>  arch/microblaze/include/asm/setup.h |  2 --
>  arch/mips/include/asm/irq.h         |  1 -
>  arch/parisc/kernel/smp.c            |  1 -
>  arch/powerpc/include/asm/irq.h      |  1 -
>  arch/riscv/include/asm/irq.h        |  2 --
>  arch/riscv/include/asm/timex.h      |  2 --
>  arch/s390/kernel/entry.h            |  2 --
>  arch/sh/include/asm/irq.h           |  1 -
>  arch/sh/include/asm/rtc.h           |  2 --
>  arch/sparc/include/asm/irq_32.h     |  1 -
>  arch/sparc/include/asm/irq_64.h     |  1 -
>  arch/sparc/include/asm/timer_64.h   |  1 -
>  arch/sparc/kernel/kernel.h          |  4 ----
>  arch/x86/include/asm/irq.h          |  2 --
>  arch/x86/include/asm/mem_encrypt.h  |  3 ---
>  arch/x86/include/asm/time.h         |  1 -
>  arch/x86/include/asm/tsc.h          |  1 -
>  include/linux/acpi.h                |  3 ++-
>  include/linux/delay.h               |  1 +
>  include/linux/init.h                | 20 ++++++++++++++++++++
>  init/main.c                         | 18 ------------------
>  22 files changed, 23 insertions(+), 48 deletions(-)

...

> diff --git a/arch/riscv/include/asm/irq.h b/arch/riscv/include/asm/irq.h
> index 43b9ebfbd943..8e10a94430a2 100644
> --- a/arch/riscv/include/asm/irq.h
> +++ b/arch/riscv/include/asm/irq.h
> @@ -16,6 +16,4 @@ void riscv_set_intc_hwnode_fn(struct fwnode_handle *(*fn)(void));
>
>  struct fwnode_handle *riscv_get_intc_hwnode(void);
>
> -extern void __init init_IRQ(void);
> -
>  #endif /* _ASM_RISCV_IRQ_H */
> diff --git a/arch/riscv/include/asm/timex.h b/arch/riscv/include/asm/timex.h
> index d6a7428f6248..a06697846e69 100644
> --- a/arch/riscv/include/asm/timex.h
> +++ b/arch/riscv/include/asm/timex.h
> @@ -88,6 +88,4 @@ static inline int read_current_timer(unsigned long *timer_val)
>  	return 0;
>  }
>
> -extern void time_init(void);
> -
>  #endif /* _ASM_RISCV_TIMEX_H */

Reviewed-by: Palmer Dabbelt <palmer@...osinc.com> # RISC-V
Acked-by: Palmer Dabbelt <palmer@...osinc.com> # RISC-V

Thanks!