From: Richard Weinberger <richard.weinberger@gmail.com>
Subject: Re: [PATCH 1/6] ext4: Move is_32bit_api() to generic code
Date: Mon, 12 Dec 2016 23:18:35 +0100
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Cc: "linux-mtd@lists.infradead.org" <linux-mtd@lists.infradead.org>,
        David Gstir <david@sigma-star.at>,
        "Theodore Ts'o" <tytso@mit.edu>,
        Artem Bityutskiy <dedekind1@gmail.com>,
        Adrian Hunter <adrian.hunter@intel.com>,
        LKML <linux-kernel@vger.kernel.org>,
        linux-fsdevel <linux-fsdevel@vger.kernel.org>,
        adilger.kernel@dilger.ca,
        Andrew Morton <akpm@linux-foundation.org>,
        linux-ext4@vger.kernel.org
To: Richard Weinberger <richard@nod.at>
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On Thu, Dec 1, 2016 at 11:02 PM, Richard Weinberger <richard@nod.at> wrote:
> Since UBIFS will also use this function, move it to compat.h.
>
> Signed-off-by: Richard Weinberger <richard@nod.at>
> ---
>  fs/ext4/dir.c          | 9 ---------
>  include/linux/compat.h | 2 ++
>  2 files changed, 2 insertions(+), 9 deletions(-)
>
> diff --git a/fs/ext4/dir.c b/fs/ext4/dir.c
> index e8b365000d73..464e6e99d744 100644
> --- a/fs/ext4/dir.c
> +++ b/fs/ext4/dir.c
> @@ -290,15 +290,6 @@ static int ext4_readdir(struct file *file, struct dir_context *ctx)
>         return err;
>  }
>
> -static inline int is_32bit_api(void)
> -{
> -#ifdef CONFIG_COMPAT
> -       return in_compat_syscall();
> -#else
> -       return (BITS_PER_LONG == 32);
> -#endif
> -}
> -
>  /*
>   * These functions convert from the major/minor hash to an f_pos
>   * value for dx directories
> diff --git a/include/linux/compat.h b/include/linux/compat.h
> index 63609398ef9f..8412382e8d08 100644
> --- a/include/linux/compat.h
> +++ b/include/linux/compat.h
> @@ -730,11 +730,13 @@ asmlinkage long compat_sys_fanotify_mark(int, unsigned int, __u32, __u32,
>  #ifndef in_compat_syscall
>  static inline bool in_compat_syscall(void) { return is_compat_task(); }
>  #endif
> +static inline int is_32bit_api(void) { return in_compat_syscall(); }
>
>  #else
>
>  #define is_compat_task() (0)
>  static inline bool in_compat_syscall(void) { return false; }
> +static inline int is_32bit_api(void) { return BITS_PER_LONG == 32; }
>
>  #endif /* CONFIG_COMPAT */

Just realized that this patch didn't get any feedback.
Ted, are you fine with it?

Anyway, exportable UBIFS has to wait until the next merge window.

-- 
Thanks,
//richard