linux-stable.git/block/bounce.c, branch v5.16.2

mm: don't include in

2021-10-18T12:17:01+00:00

There is no need to pull blk-cgroup.h and thus blkdev.h in here, so
break the include chain.

Signed-off-by: Christoph Hellwig 
Reviewed-by: Johannes Thumshirn 
Link: https://lore.kernel.org/r/20210920123328.1399408-3-hch@lst.de
Signed-off-by: Jens Axboe

block: use memcpy_from_bvec in __blk_queue_bounce

2021-08-02T19:37:28+00:00

Rewrite the actual bounce buffering loop in __blk_queue_bounce to that
the memcpy_to_bvec helper can be used to perform the data copies.

Signed-off-by: Christoph Hellwig 
Reviewed-by: Martin K. Petersen 
Link: https://lore.kernel.org/r/20210727055646.118787-14-hch@lst.de
Signed-off-by: Jens Axboe

block: use memcpy_to_bvec in copy_to_high_bio_irq

2021-08-02T19:37:28+00:00

Use memcpy_to_bvec instead of opencoding the logic.

Signed-off-by: Christoph Hellwig 
Reviewed-by: Martin K. Petersen 
Link: https://lore.kernel.org/r/20210727055646.118787-12-hch@lst.de
Signed-off-by: Jens Axboe

block: stop calling blk_queue_bounce for passthrough requests

2021-04-06T15:28:18+00:00

Instead of overloading the passthrough fast path with the deprecated
block layer bounce buffering let the users that combine an old
undermaintained driver with a highmem system pay the price by always
falling back to copies in that case.

Signed-off-by: Christoph Hellwig 
Acked-by: Martin K. Petersen 
Reviewed-by: Hannes Reinecke 
Link: https://lore.kernel.org/r/20210331073001.46776-9-hch@lst.de
Signed-off-by: Jens Axboe

block: refactor the bounce buffering code

2021-04-06T15:28:17+00:00

Get rid of all the PFN arithmetics and just use an enum for the two
remaining options, and use PageHighMem for the actual bounce decision.

Add a fast path to entirely avoid the call for the common case of a queue
not using the legacy bouncing code.

Signed-off-by: Christoph Hellwig 
Acked-by: Martin K. Petersen 
Reviewed-by: Hannes Reinecke 
Link: https://lore.kernel.org/r/20210331073001.46776-8-hch@lst.de
Signed-off-by: Jens Axboe

block: remove BLK_BOUNCE_ISA support

2021-04-06T15:28:17+00:00

Remove the BLK_BOUNCE_ISA support now that all users are gone.

Signed-off-by: Christoph Hellwig 
Acked-by: Martin K. Petersen 
Reviewed-by: Hannes Reinecke 
Link: https://lore.kernel.org/r/20210331073001.46776-7-hch@lst.de
Signed-off-by: Jens Axboe

block: rename BIO_MAX_PAGES to BIO_MAX_VECS

2021-03-11T14:47:48+00:00

Ever since the addition of multipage bio_vecs BIO_MAX_PAGES has been
horribly confusingly misnamed.  Rename it to BIO_MAX_VECS to stop
confusing users of the bio API.

Signed-off-by: Christoph Hellwig 
Reviewed-by: Matthew Wilcox (Oracle) 
Reviewed-by: Martin K. Petersen 
Link: https://lore.kernel.org/r/20210311110137.1132391-2-hch@lst.de
Signed-off-by: Jens Axboe

block: memory allocations in bounce_clone_bio must not fail

2021-02-24T15:55:00+00:00

The caller can't cope with a failure from bounce_clone_bio, so
use __GFP_NOFAIL for the passthrough case.  bio_alloc_bioset already
won't fail due to the use of mempools.

And yes, we need to get rid of this bock layer bouncing code entirely
sooner or later..

Signed-off-by: Christoph Hellwig 
Signed-off-by: Jens Axboe

block: remove the gfp_mask argument to bounce_clone_bio

2021-02-24T15:55:00+00:00

The only caller always passes GFP_NOIO.

Signed-off-by: Christoph Hellwig 
Signed-off-by: Jens Axboe

block: fix bounce_clone_bio for passthrough bios

2021-02-24T15:55:00+00:00

Now that bio_alloc_bioset does not fall back to kmalloc for a NULL
bio_set, handle that case explicitly and simplify the calling
conventions.

Based on an earlier patch from Chaitanya Kulkarni.

Fixes: 3175199ab0ac ("block: split bio_kmalloc from bio_alloc_bioset")
Reported-by: Chaitanya Kulkarni 
Signed-off-by: Christoph Hellwig 
Signed-off-by: Jens Axboe