Re: [Qemu-devel] [PATCH v12 5/5] linux-user: Fix flock structure for MIPS O64 ABI

[Laurent Vivier <laurent@vivier.eu>]

Le 19/06/2019 à 16:17, Aleksandar Markovic a écrit :
> From: Aleksandar Markovic <amarkovic@wavecomp.com>
> 
> Only MIPS O32 and N32 have special (different than other
> architectures) definition of structure flock in kernel.
> 
> Bring flock definition for MIPS O64 ABI to the correct state.
> 
> Reported-by: Dragan Mladjenovic <dmladjenovic@wavecomp.com>
> Signed-off-by: Aleksandar Markovic <amarkovic@wavecomp.com>
> ---
>  linux-user/generic/fcntl.h     | 2 +-
>  linux-user/mips/target_fcntl.h | 4 ++++
>  2 files changed, 5 insertions(+), 1 deletion(-)
> 
> diff --git a/linux-user/generic/fcntl.h b/linux-user/generic/fcntl.h
> index a775a49..1b48dde 100644
> --- a/linux-user/generic/fcntl.h
> +++ b/linux-user/generic/fcntl.h
> @@ -129,7 +129,7 @@ struct target_flock {
>      short l_whence;
>      abi_long l_start;
>      abi_long l_len;
> -#if defined(TARGET_MIPS)
> +#if defined(TARGET_MIPS) && (TARGET_ABI_BITS == 32)
>      abi_long l_sysid;
>  #endif
>      int l_pid;
> diff --git a/linux-user/mips/target_fcntl.h b/linux-user/mips/target_fcntl.h
> index 000527c..795bba7 100644
> --- a/linux-user/mips/target_fcntl.h
> +++ b/linux-user/mips/target_fcntl.h
> @@ -27,7 +27,11 @@
>  #define TARGET_F_SETOWN        24       /*  for sockets. */
>  #define TARGET_F_GETOWN        23       /*  for sockets. */
>  
> +#if (TARGET_ABI_BITS == 32)
>  #define TARGET_ARCH_FLOCK_PAD abi_long pad[4];
> +#else
> +#define TARGET_ARCH_FLOCK_PAD
> +#endif
>  #define TARGET_ARCH_FLOCK64_PAD
>  
>  #define TARGET_F_GETLK64       33      /*  using 'struct flock64' */
> 

The patch is correct, but I think it would be cleaner to introduce an
"TARGET_HAVE_ARCH_STRUCT_FLOCK" as we have in the kernel for the mips case.

Thanks,
Laurent