linux-kernel - Re: [PATCH v5 5/6] staging: android: binder: replace types with portable ones

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Date:	Thu, 04 Jul 2013 10:39:13 +0100
From:	Serban Constantinescu <Serban.Constantinescu@....com>
To:	Arve Hjønnevåg <arve@...roid.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 v5 5/6] staging: android: binder: replace types with portable
 ones

On 03/07/13 23:30, Arve Hjønnevåg wrote:
> On Wed, Jun 19, 2013 at 10:12 AM, Serban Constantinescu
> <serban.constantinescu@....com> wrote:
>> Since this driver is meant to be used on different types of processors
>> and a portable driver should specify the size a variable expects to be
>> this patch changes the types used throughout the binder interface.
>>
>> We use "userspace" types since this header will be exported and used by
>> the Android filesystem.
>>
>> The patch does not change in any way the functionality of the binder driver.
>>
>> Signed-off-by: Serban Constantinescu <serban.constantinescu@....com>
>> Acked-by: Arve Hjønnevåg <arve@...roid.com>
>> ---
>>   drivers/staging/android/binder.h |   26 +++++++++++++-------------
>>   1 file changed, 13 insertions(+), 13 deletions(-)
>>
>> diff --git a/drivers/staging/android/binder.h b/drivers/staging/android/binder.h
>> index b55bba9..dadfce0 100644
>> --- a/drivers/staging/android/binder.h
>> +++ b/drivers/staging/android/binder.h
>> @@ -123,10 +123,10 @@ struct binder_transaction_data {
>>                  void    *ptr;   /* target descriptor of return transaction */
>>          } target;
>>          void            *cookie;        /* target object cookie */
>> -       unsigned int    code;           /* transaction command */
>> +       __u32           code;           /* transaction command */
>>
>>          /* General information about the transaction. */
>> -       unsigned int    flags;
>> +       __u32           flags;
>>          pid_t           sender_pid;
>>          uid_t           sender_euid;
>>          size_t          data_size;      /* number of bytes of data */
>> @@ -143,7 +143,7 @@ struct binder_transaction_data {
>>                          /* offsets from buffer to flat_binder_object structs */
>>                          const void __user       *offsets;
>>                  } ptr;
>> -               uint8_t buf[8];
>> +               __u8    buf[8];
>>          } data;
>>   };
>>
>> @@ -153,18 +153,18 @@ struct binder_ptr_cookie {
>>   };
>>
>>   struct binder_pri_desc {
>> -       int priority;
>> -       int desc;
>> +       __s32 priority;
>> +       __s32 desc;
>
> desc should be __u32 to be consistent with the other changes you are
> making in this and the next patch.

I have added this change to v6 of this patch set which I will send out 
shortly.


Thanks again for your feedback,
Serban
>
>>   };
>>
>>   struct binder_pri_ptr_cookie {
>> -       int priority;
>> +       __s32 priority;
>>          void *ptr;
>>          void *cookie;
>>   };
>>
>>   enum binder_driver_return_protocol {
>> -       BR_ERROR = _IOR('r', 0, int),
>> +       BR_ERROR = _IOR('r', 0, __s32),
>>          /*
>>           * int: error code
>>           */
>> @@ -178,7 +178,7 @@ enum binder_driver_return_protocol {
>>           * binder_transaction_data: the received command.
>>           */
>>
>> -       BR_ACQUIRE_RESULT = _IOR('r', 4, int),
>> +       BR_ACQUIRE_RESULT = _IOR('r', 4, __s32),
>>          /*
>>           * not currently supported
>>           * int: 0 if the last bcATTEMPT_ACQUIRE was not successful.
>> @@ -258,7 +258,7 @@ enum binder_driver_command_protocol {
>>           * binder_transaction_data: the sent command.
>>           */
>>
>> -       BC_ACQUIRE_RESULT = _IOW('c', 2, int),
>> +       BC_ACQUIRE_RESULT = _IOW('c', 2, __s32),
>>          /*
>>           * not currently supported
>>           * int:  0 if the last BR_ATTEMPT_ACQUIRE was not successful.
>> @@ -270,10 +270,10 @@ enum binder_driver_command_protocol {
>>           * void *: ptr to transaction data received on a read
>>           */
>>
>> -       BC_INCREFS = _IOW('c', 4, int),
>> -       BC_ACQUIRE = _IOW('c', 5, int),
>> -       BC_RELEASE = _IOW('c', 6, int),
>> -       BC_DECREFS = _IOW('c', 7, int),
>> +       BC_INCREFS = _IOW('c', 4, __u32),
>> +       BC_ACQUIRE = _IOW('c', 5, __u32),
>> +       BC_RELEASE = _IOW('c', 6, __u32),
>> +       BC_DECREFS = _IOW('c', 7, __u32),
>>          /*
>>           * int: descriptor
>>           */
>> --
>> 1.7.9.5
>>
>
>
>
> --
> Arve Hjønnevåg
>

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