linux-kernel - Re: [PATCH v4 1/6] staging: android: binder: modify struct binder_write_read to use size

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Message-ID: <CAMP5Xge1QM-z0Y=cKAKwN8ubj+iZVtOWvNHdQb02MHMjEHTvYg@mail.gmail.com>
Date:	Mon, 3 Jun 2013 14:42:26 -0700
From:	Arve Hjønnevåg <arve@...roid.com>
To:	Serban Constantinescu <serban.constantinescu@....com>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	Greg KH <gregkh@...uxfoundation.org>,
	Android Kernel Team <kernel-team@...roid.com>,
	John Stultz <john.stultz@...aro.org>,
	Dave Butcher <Dave.Butcher@....com>
Subject: Re: [PATCH v4 1/6] staging: android: binder: modify struct
 binder_write_read to use size_t

On Wed, May 22, 2013 at 3:12 AM, Serban Constantinescu
<serban.constantinescu@....com> wrote:
> This change mirrors the userspace operation where struct binder_write_read
> members that specify the buffer size and consumed size are size_t elements.
>
> The patch also fixes the binder_thread_write() and binder_thread_read()
> functions prototypes to conform with the definition of binder_write_read.
>
> The changes do not affect existing 32bit ABI.
>
> Signed-off-by: Serban Constantinescu <serban.constantinescu@....com>
> ---
>  drivers/staging/android/binder.c |   10 +++++-----
>  drivers/staging/android/binder.h |    8 ++++----
>  2 files changed, 9 insertions(+), 9 deletions(-)
>
> diff --git a/drivers/staging/android/binder.c b/drivers/staging/android/binder.c
> index 1567ac2..ce70909 100644
> --- a/drivers/staging/android/binder.c
> +++ b/drivers/staging/android/binder.c
> @@ -1700,7 +1700,7 @@ err_no_context_mgr_node:
>  }
>
>  int binder_thread_write(struct binder_proc *proc, struct binder_thread *thread,
> -                       void __user *buffer, int size, signed long *consumed)
> +                       void __user *buffer, size_t size, size_t *consumed)
>  {
>         uint32_t cmd;
>         void __user *ptr = buffer + *consumed;
> @@ -2080,8 +2080,8 @@ static int binder_has_thread_work(struct binder_thread *thread)
>
>  static int binder_thread_read(struct binder_proc *proc,
>                               struct binder_thread *thread,
> -                             void  __user *buffer, int size,
> -                             signed long *consumed, int non_block)
> +                             void  __user *buffer, size_t size,
> +                             size_t *consumed, int non_block)
>  {
>         void __user *ptr = buffer + *consumed;
>         void __user *end = buffer + size;
> @@ -2578,7 +2578,7 @@ static long binder_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
>                         goto err;
>                 }
>                 binder_debug(BINDER_DEBUG_READ_WRITE,
> -                            "%d:%d write %ld at %08lx, read %ld at %08lx\n",
> +                            "%d:%d write %zd at %08lx, read %zd at %08lx\n",
>                              proc->pid, thread->pid, bwr.write_size,
>                              bwr.write_buffer, bwr.read_size, bwr.read_buffer);
>
> @@ -2604,7 +2604,7 @@ static long binder_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
>                         }
>                 }
>                 binder_debug(BINDER_DEBUG_READ_WRITE,
> -                            "%d:%d wrote %ld of %ld, read return %ld of %ld\n",
> +                            "%d:%d wrote %zd of %zd, read return %zd of %zd\n",
>                              proc->pid, thread->pid, bwr.write_consumed, bwr.write_size,
>                              bwr.read_consumed, bwr.read_size);
>                 if (copy_to_user(ubuf, &bwr, sizeof(bwr))) {
> diff --git a/drivers/staging/android/binder.h b/drivers/staging/android/binder.h
> index dbe81ce..edab249 100644
> --- a/drivers/staging/android/binder.h
> +++ b/drivers/staging/android/binder.h
> @@ -67,11 +67,11 @@ struct flat_binder_object {
>   */
>
>  struct binder_write_read {
> -       signed long     write_size;     /* bytes to write */
> -       signed long     write_consumed; /* bytes consumed by driver */
> +       size_t write_size;      /* bytes to write */
> +       size_t write_consumed;  /* bytes consumed by driver */
>         unsigned long   write_buffer;
> -       signed long     read_size;      /* bytes to read */
> -       signed long     read_consumed;  /* bytes consumed by driver */
> +       size_t read_size;       /* bytes to read */
> +       size_t read_consumed;   /* bytes consumed by driver */
>         unsigned long   read_buffer;
>  };
>
> --
> 1.7.9.5
>

Acked-by: Arve Hjønnevåg <arve@...roid.com>

--
Arve Hjønnevåg
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