linux-ext4 - Re: [PATCH 1/1] mm/block: convert rw

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Message-ID: <57A39E85.6000606@redhat.com>
Date:	Thu, 4 Aug 2016 14:59:01 -0500
From:	Mike Christie <mchristi@...hat.com>
To:	Jens Axboe <axboe@...nel.dk>, kbuild test robot <lkp@...el.com>
Cc:	kbuild-all@...org, ross.zwisler@...ux.intel.com,
	linux-ext4@...r.kernel.org, linux-block@...r.kernel.org,
	linux-fsdevel@...r.kernel.org, david@...morbit.com,
	minchan@...nel.org, ngupta@...are.org, vishal.l.verma@...el.com
Subject: Re: [PATCH 1/1] mm/block: convert rw_page users to bio op use

On 08/04/2016 02:27 PM, Jens Axboe wrote:
> On 08/04/2016 11:50 AM, kbuild test robot wrote:
>> Hi Mike,
>>
>> [auto build test ERROR on linus/master]
>> [also build test ERROR on next-20160804]
>> [cannot apply to v4.7]
>> [if your patch is applied to the wrong git tree, please drop us a note
>> to help improve the system]
>>
>> url:   
>> https://github.com/0day-ci/linux/commits/Mike-Christie/mm-block-convert-rw_page-users-to-bio-op-use/20160805-012041
>>
>> config: i386-tinyconfig (attached as .config)
>> compiler: gcc-6 (Debian 6.1.1-9) 6.1.1 20160705
>> reproduce:
>>         # save the attached .config to linux build tree
>>         make ARCH=i386
>>
>> All errors (new ones prefixed by >>):
>>
>>    mm/filemap.c: In function 'page_endio':
>>>> mm/filemap.c:892:7: error: implicit declaration of function
>>>> 'op_is_write' [-Werror=implicit-function-declaration]
>>      if (!op_is_write(op)) {
>>           ^~~~~~~~~~~
> 
> Mike, how about moving op_is_write() outside of CONFIG_BLOCK protection
> in fs.h, and making the REQ_OP_* enum generally available as well? That
> should fix it.
> 
> 
> diff --git a/include/linux/blk_types.h b/include/linux/blk_types.h
> index f254eb264924..14b28ff2caf8 100644
> --- a/include/linux/blk_types.h
> +++ b/include/linux/blk_types.h
> @@ -18,6 +18,17 @@ struct cgroup_subsys_state;
>  typedef void (bio_end_io_t) (struct bio *);
>  typedef void (bio_destructor_t) (struct bio *);
> 
> +enum req_op {
> +    REQ_OP_READ,
> +    REQ_OP_WRITE,
> +    REQ_OP_DISCARD,        /* request to discard sectors */
> +    REQ_OP_SECURE_ERASE,    /* request to securely erase sectors */
> +    REQ_OP_WRITE_SAME,    /* write same block many times */
> +    REQ_OP_FLUSH,        /* request for cache flush */
> +};
> +
> +#define REQ_OP_BITS 3
> +
>  #ifdef CONFIG_BLOCK
>  /*
>   * main unit of I/O for the block layer and lower layers (ie drivers and
> @@ -228,17 +239,6 @@ enum rq_flag_bits {
>  #define REQ_HASHED        (1ULL << __REQ_HASHED)
>  #define REQ_MQ_INFLIGHT        (1ULL << __REQ_MQ_INFLIGHT)
> 
> -enum req_op {
> -    REQ_OP_READ,
> -    REQ_OP_WRITE,
> -    REQ_OP_DISCARD,        /* request to discard sectors */
> -    REQ_OP_SECURE_ERASE,    /* request to securely erase sectors */
> -    REQ_OP_WRITE_SAME,    /* write same block many times */
> -    REQ_OP_FLUSH,        /* request for cache flush */
> -};
> -
> -#define REQ_OP_BITS 3
> -
>  typedef unsigned int blk_qc_t;
>  #define BLK_QC_T_NONE    -1U
>  #define BLK_QC_T_SHIFT    16
> diff --git a/include/linux/fs.h b/include/linux/fs.h
> index f2a69f20926f..13cc1bfce9aa 100644
> --- a/include/linux/fs.h
> +++ b/include/linux/fs.h
> @@ -2465,12 +2465,13 @@ extern void init_special_inode(struct inode *,
> umode_t, dev_t);
>  extern void make_bad_inode(struct inode *);
>  extern bool is_bad_inode(struct inode *);
> 
> -#ifdef CONFIG_BLOCK
>  static inline bool op_is_write(unsigned int op)
>  {
>      return op == REQ_OP_READ ? false : true;
>  }
> 
> +#ifdef CONFIG_BLOCK
> +
>  /*
>   * return data direction, READ or WRITE
>   */
> 


Looks ok to me. Did a quick build and test run with it.


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