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Date: Fri, 26 Oct 2007 13:54:30 +0200
From: Jens Axboe <jens.axboe@oracle.com>
Subject: Re: S390 change in sg_set_page() cause build failure
Message-ID: <20071026115429.GH5155@kernel.dk>
References: <20071026111945.GB21274@linux.vnet.ibm.com>
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To: Kamalesh Babulal <kamalesh@linux.vnet.ibm.com>
Cc: linux-kernel@vger.kernel.org, torvalds@linux-foundation.org, akpm@linux-foundation.org, linux-s390@vger.kernel.org
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On Fri, Oct 26 2007, Kamalesh Babulal wrote:
> Hi Jens,
> 
> The change in the sg_set_page() for the S390, cause the build failure
> 
> drivers/s390/scsi/zfcp_aux.c: In function `zfcp_sg_list_alloc':
> drivers/s390/scsi/zfcp_aux.c:572: error: too many arguments to function `zfcp_address_to_sg'
> drivers/s390/scsi/zfcp_aux.c: In function `zfcp_gid_pn_buffers_alloc':
> drivers/s390/scsi/zfcp_aux.c:1524: error: too many arguments to function `zfcp_address_to_sg'
> drivers/s390/scsi/zfcp_aux.c:1525: error: too many arguments to function `zfcp_address_to_sg'
> make[2]: *** [drivers/s390/scsi/zfcp_aux.o] Error 1
> make[1]: *** [drivers/s390/scsi] Error 2
> make: *** [drivers/s390] Error 2
> 
> The commit 642f149031d70415d9318b919d50b71e4724adbd causes this build
> failure, in the drivers/s390/scsi/zfcp_def.h include file, the function
> zfcp_address_to_sg the len of the scatterlist missing.
> 
> Signed-off-by: Kamalesh Babulal <kamalesh@linux.vnet.ibm.com>
> --
> diff --git a/drivers/s390/scsi/zfcp_def.h b/drivers/s390/scsi/zfcp_def.h
> index 0754542..acf2d22 100644
> --- a/drivers/s390/scsi/zfcp_def.h
> +++ b/drivers/s390/scsi/zfcp_def.h
> @@ -70,9 +70,11 @@ zfcp_sg_to_address(struct scatterlist *list)
>   * zfcp_address_to_sg - set up struct scatterlist from kernel address
>   * @address: kernel address
>   * @list: struct scatterlist
> + * @list_size: size of the list - used for compatibility 
>   */
>  static inline void
> -zfcp_address_to_sg(void *address, struct scatterlist *list)
> +zfcp_address_to_sg(void *address, struct scatterlist *list,
> +                   unsigned int list_size)
>  {
>  	sg_set_buf(list, address, 0);
>  }

That's not quite right, it should be:

diff --git a/drivers/s390/scsi/zfcp_def.h b/drivers/s390/scsi/zfcp_def.h
index 0754542..e268f79 100644
--- a/drivers/s390/scsi/zfcp_def.h
+++ b/drivers/s390/scsi/zfcp_def.h
@@ -70,11 +70,12 @@ zfcp_sg_to_address(struct scatterlist *list)
  * zfcp_address_to_sg - set up struct scatterlist from kernel address
  * @address: kernel address
  * @list: struct scatterlist
+ * @size: buffer size
  */
 static inline void
-zfcp_address_to_sg(void *address, struct scatterlist *list)
+zfcp_address_to_sg(void *address, struct scatterlist *list, unsigned int size)
 {
-	sg_set_buf(list, address, 0);
+	sg_set_buf(list, address, size);
 }
 
 #define REQUEST_LIST_SIZE 128

-- 
Jens Axboe