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Commit 83f5f7ed authored Nov 08, 2017 by Jens Axboe

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>

parent 05b79413

Documentation/block/biodoc.txt

+2 −2

Original line number	Diff line number	Diff line
		@@ -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

+0 −11

Original line number	Diff line number	Diff line
		@@ -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.
		*