[PATCH 3/5] block: remove the ->rq_disk field in struct request

[Chaitanya Kulkarni]

On 9/27/21 10:22 PM, Christoph Hellwig wrote:
> Just use the disk attached to the request_queue instead.
> 
> Signed-off-by: Christoph Hellwig <hch at lst.de>
> ---

Please consider adding :-

root at dev linux-block (for-next) # git diff drivers/mtd
diff --git a/drivers/mtd/mtd_blkdevs.c b/drivers/mtd/mtd_blkdevs.c
index b8ae1ec14e17..f0488694afdb 100644
--- a/drivers/mtd/mtd_blkdevs.c
+++ b/drivers/mtd/mtd_blkdevs.c
@@ -59,7 +59,7 @@ static blk_status_t do_blktrans_request(struct 
mtd_blktrans_ops *tr,
         }

         if (blk_rq_pos(req) + blk_rq_cur_sectors(req) >
-           get_capacity(req->rq_disk))
+           get_capacity(req->q->disk))
                 return BLK_STS_IOERR;

         switch (req_op(req)) {

* Without above patch :-

root at dev linux-block (for-next) # makej drivers/mtd/
   DESCEND objtool
   CALL    scripts/atomic/check-atomics.sh
   CALL    scripts/checksyscalls.sh
   CC [M]  drivers/mtd/mtd_blkdevs.o
   CC [M]  drivers/mtd/mtdblock.o
   LD [M]  drivers/mtd/mtd.o
drivers/mtd/mtd_blkdevs.c: In function ‘do_blktrans_request’:
drivers/mtd/mtd_blkdevs.c:62:29: error: ‘struct request’ has no member 
named ‘rq_disk’
    62 |             get_capacity(req->rq_disk))
       |                             ^~
make[2]: *** [scripts/Makefile.build:277: drivers/mtd/mtd_blkdevs.o] Error 1
make[2]: *** Waiting for unfinished jobs....
make[1]: *** [scripts/Makefile.build:540: drivers/mtd] Error 2
make: *** [Makefile:1868: drivers] Error 2
root at dev linux-block (for-next) #

* With above patch :-

root at dev linux-block (for-next) # makej drivers/mtd/
   DESCEND objtool
   CALL    scripts/atomic/check-atomics.sh
   CALL    scripts/checksyscalls.sh
   CC [M]  drivers/mtd/mtd_blkdevs.o

-ck