linux-kernel - Re: [PATCH 19/19] powerpc/tau: Synchronize function prototypes and body

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Message-ID: <e7735711-c81a-55c4-ddc2-75f55e84b17e@c-s.fr>
Date:   Fri, 23 Mar 2018 13:22:29 +0100
From:   christophe leroy <christophe.leroy@....fr>
To:     Mathieu Malaterre <malat@...ian.org>,
        Michael Ellerman <mpe@...erman.id.au>
Cc:     linux-kernel@...r.kernel.org, kvm-ppc@...r.kernel.org,
        Paul Mackerras <paulus@...ba.org>,
        linuxppc-dev@...ts.ozlabs.org
Subject: Re: [PATCH 19/19] powerpc/tau: Synchronize function prototypes and
 body



Le 22/03/2018 à 21:20, Mathieu Malaterre a écrit :
> Some function prototypes and body for Thermal Assist Units were not in
> sync. Update the function definition to match the existing function
> declaration found in `setup-common.c`, changing an `int` return type to a
> `u32` return type. Move the prototypes to a header file. Fix the following
> warnings, treated as error with W=1:
> 
>    arch/powerpc/kernel/tau_6xx.c:257:5: error: no previous prototype for ‘cpu_temp_both’ [-Werror=missing-prototypes]
>    arch/powerpc/kernel/tau_6xx.c:262:5: error: no previous prototype for ‘cpu_temp’ [-Werror=missing-prototypes]
>    arch/powerpc/kernel/tau_6xx.c:267:5: error: no previous prototype for ‘tau_interrupts’ [-Werror=missing-prototypes]
> 
> Compile tested with CONFIG_TAU_INT.
> 
> Signed-off-by: Mathieu Malaterre <malat@...ian.org>
> ---
>   arch/powerpc/kernel/irq.c          | 2 +-
>   arch/powerpc/kernel/setup-common.c | 6 ------
>   arch/powerpc/kernel/setup.h        | 6 ++++++
>   arch/powerpc/kernel/tau_6xx.c      | 7 +++++--
>   4 files changed, 12 insertions(+), 9 deletions(-)
> 
> diff --git a/arch/powerpc/kernel/irq.c b/arch/powerpc/kernel/irq.c
> index f88038847790..3777b6e09142 100644
> --- a/arch/powerpc/kernel/irq.c
> +++ b/arch/powerpc/kernel/irq.c
> @@ -89,7 +89,7 @@ atomic_t ppc_n_lost_interrupts;
>   
>   #ifdef CONFIG_TAU_INT
>   extern int tau_initialized;
> -extern int tau_interrupts(int);
> +extern u32 tau_interrupts(unsigned long cpu);
>   #endif
>   #endif /* CONFIG_PPC32 */
>   
> diff --git a/arch/powerpc/kernel/setup-common.c b/arch/powerpc/kernel/setup-common.c
> index d73ec518ef80..bd3675c3984b 100644
> --- a/arch/powerpc/kernel/setup-common.c
> +++ b/arch/powerpc/kernel/setup-common.c
> @@ -192,12 +192,6 @@ void machine_halt(void)
>   	machine_hang();
>   }
>   
> -
> -#ifdef CONFIG_TAU
> -extern u32 cpu_temp(unsigned long cpu);
> -extern u32 cpu_temp_both(unsigned long cpu);
> -#endif /* CONFIG_TAU */
> -
>   #ifdef CONFIG_SMP
>   DEFINE_PER_CPU(unsigned int, cpu_pvr);
>   #endif
> diff --git a/arch/powerpc/kernel/setup.h b/arch/powerpc/kernel/setup.h
> index d768023a04bd..3c9c19430439 100644
> --- a/arch/powerpc/kernel/setup.h
> +++ b/arch/powerpc/kernel/setup.h
> @@ -70,4 +70,10 @@ void kvm_cma_reserve(void);
>   static inline void kvm_cma_reserve(void) { };
>   #endif
>   
> +#ifdef CONFIG_TAU
> +extern u32 cpu_temp(unsigned long cpu);
> +extern u32 cpu_temp_both(unsigned long cpu);
> +extern u32 tau_interrupts(unsigned long cpu);

extern keyword is not needed


Christophe

> +#endif /* CONFIG_TAU */
> +
>   #endif /* __ARCH_POWERPC_KERNEL_SETUP_H */
> diff --git a/arch/powerpc/kernel/tau_6xx.c b/arch/powerpc/kernel/tau_6xx.c
> index 1fc6a89a978e..e2ab8a111b69 100644
> --- a/arch/powerpc/kernel/tau_6xx.c
> +++ b/arch/powerpc/kernel/tau_6xx.c
> @@ -27,6 +27,9 @@
>   #include <asm/cache.h>
>   #include <asm/8xx_immap.h>
>   #include <asm/machdep.h>
> +#include <asm/asm-prototypes.h>
> +
> +#include "setup.h"
>   
>   static struct tau_temp
>   {
> @@ -259,12 +262,12 @@ u32 cpu_temp_both(unsigned long cpu)
>   	return ((tau[cpu].high << 16) | tau[cpu].low);
>   }
>   
> -int cpu_temp(unsigned long cpu)
> +u32 cpu_temp(unsigned long cpu)
>   {
>   	return ((tau[cpu].high + tau[cpu].low) / 2);
>   }
>   
> -int tau_interrupts(unsigned long cpu)
> +u32 tau_interrupts(unsigned long cpu)
>   {
>   	return (tau[cpu].interrupts);
>   }
> 

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