block: kill bio_kmap/kunmap_irq()

There are no users of it anymore.
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

Documentation/block/biodoc.txt

@@ -216,7 +216,7 @@ may need to abort DMA operations and revert to PIO for the transfer, in
 which case a virtual mapping of the page is required. For SCSI it is also
 done in some scenarios where the low level driver cannot be trusted to
 handle a single sg entry correctly. The driver is expected to perform the
-kmaps as needed on such occasions using the __bio_kmap_atomic and bio_kmap_irq
+kmaps as needed on such occasions using the bio_kmap_irq and friends
 routines as appropriate. A driver could also use the blk_queue_bounce()
 routine on its own to bounce highmem i/o to low memory for specific requests
 if so desired.
@@ -1137,7 +1137,7 @@ use dma_map_sg for scatter gather) to be able to ship it to the driver. For
 PIO drivers (or drivers that need to revert to PIO transfer once in a
 while (IDE for example)), where the CPU is doing the actual data
 transfer a virtual mapping is needed. If the driver supports highmem I/O,
-(Sec 1.1, (ii) ) it needs to use __bio_kmap_atomic and bio_kmap_irq to
+(Sec 1.1, (ii) ) it needs to use __bio_kmap_atomic or similar to
 temporarily map a bio into the virtual address space.
 
 

include/linux/bio.h

@@ -573,17 +573,6 @@ static inline void bvec_kunmap_irq(char *buffer, unsigned long *flags)
 }
 #endif
 
-static inline char *__bio_kmap_irq(struct bio *bio, struct bvec_iter iter,
-				   unsigned long *flags)
-{
-	return bvec_kmap_irq(&bio_iter_iovec(bio, iter), flags);
-}
-#define __bio_kunmap_irq(buf, flags)	bvec_kunmap_irq(buf, flags)
-
-#define bio_kmap_irq(bio, flags) \
-	__bio_kmap_irq((bio), (bio)->bi_iter, (flags))
-#define bio_kunmap_irq(buf,flags)	__bio_kunmap_irq(buf, flags)
-
 /*
  * BIO list management for use by remapping drivers (e.g. DM or MD) and loop.
  *