linux-stable.git/block/blk-map.c, branch v6.0

block: convert to advancing variants of iov_iter_get_pages{,_alloc}()

2022-08-09T02:37:22+00:00

... doing revert if we end up not using some pages

Signed-off-by: Al Viro

block/blk-map: Remove redundant assignment

2022-04-23T13:15:26+00:00

Get rid of redundant assignment to a variable ret from function
bio_map_user_iov as it is being assigned a value that is never read.
It is being re-assigned in the first instruction after the while loop

Reported by clang-tidy [deadcode.DeadStores]

Signed-off-by: Michal Orzel 
Link: https://lore.kernel.org/r/20220423113811.13335-2-michalorzel.eng@gmail.com
Signed-off-by: Jens Axboe

block: turn bio_kmalloc into a simple kmalloc wrapper

2022-04-18T01:30:41+00:00

Remove the magic autofree semantics and require the callers to explicitly
call bio_init to initialize the bio.

This allows bio_free to catch accidental bio_put calls on bio_init()ed
bios as well.

Signed-off-by: Christoph Hellwig 
Acked-by: Coly Li 
Acked-by: Mike Snitzer 
Link: https://lore.kernel.org/r/20220406061228.410163-5-hch@lst.de
Signed-off-by: Jens Axboe

block-map: add __GFP_ZERO flag for alloc_page in function bio_copy_kern

2022-02-17T14:54:03+00:00

Add __GFP_ZERO flag for alloc_page in function bio_copy_kern to initialize
the buffer of a bio.

Signed-off-by: Haimin Zhang 
Reviewed-by: Chaitanya Kulkarni 
Reviewed-by: Christoph Hellwig 
Link: https://lore.kernel.org/r/20220216084038.15635-1-tcs.kernel@gmail.com
Signed-off-by: Jens Axboe

Merge branch 'akpm' (patches from Andrew)

2021-09-03T17:08:28+00:00

Merge misc updates from Andrew Morton:
 "173 patches.

  Subsystems affected by this series: ia64, ocfs2, block, and mm (debug,
  pagecache, gup, swap, shmem, memcg, selftests, pagemap, mremap,
  bootmem, sparsemem, vmalloc, kasan, pagealloc, memory-failure,
  hugetlb, userfaultfd, vmscan, compaction, mempolicy, memblock,
  oom-kill, migration, ksm, percpu, vmstat, and madvise)"

* emailed patches from Andrew Morton : (173 commits)
  mm/madvise: add MADV_WILLNEED to process_madvise()
  mm/vmstat: remove unneeded return value
  mm/vmstat: simplify the array size calculation
  mm/vmstat: correct some wrong comments
  mm/percpu,c: remove obsolete comments of pcpu_chunk_populated()
  selftests: vm: add COW time test for KSM pages
  selftests: vm: add KSM merging time test
  mm: KSM: fix data type
  selftests: vm: add KSM merging across nodes test
  selftests: vm: add KSM zero page merging test
  selftests: vm: add KSM unmerge test
  selftests: vm: add KSM merge test
  mm/migrate: correct kernel-doc notation
  mm: wire up syscall process_mrelease
  mm: introduce process_mrelease system call
  memblock: make memblock_find_in_range method private
  mm/mempolicy.c: use in_task() in mempolicy_slab_node()
  mm/mempolicy: unify the create() func for bind/interleave/prefer-many policies
  mm/mempolicy: advertise new MPOL_PREFERRED_MANY
  mm/hugetlb: add support for mempolicy MPOL_PREFERRED_MANY
  ...

mm: remove flush_kernel_dcache_page

2021-09-03T16:58:13+00:00

flush_kernel_dcache_page is a rather confusing interface that implements a
subset of flush_dcache_page by not being able to properly handle page
cache mapped pages.

The only callers left are in the exec code as all other previous callers
were incorrect as they could have dealt with page cache pages.  Replace
the calls to flush_kernel_dcache_page with calls to flush_dcache_page,
which for all architectures does either exactly the same thing, can
contains one or more of the following:

 1) an optimization to defer the cache flush for page cache pages not
    mapped into userspace
 2) additional flushing for mapped page cache pages if cache aliases
    are possible

Link: https://lkml.kernel.org/r/20210712060928.4161649-7-hch@lst.de
Signed-off-by: Christoph Hellwig 
Acked-by: Linus Torvalds 
Reviewed-by: Ira Weiny 
Cc: Alex Shi 
Cc: Geoff Levand 
Cc: Greentime Hu 
Cc: Guo Ren 
Cc: Helge Deller 
Cc: "James E.J. Bottomley" 
Cc: Nick Hu 
Cc: Paul Cercueil 
Cc: Rich Felker 
Cc: Russell King 
Cc: Thomas Bogendoerfer 
Cc: Ulf Hansson 
Cc: Vincent Chen 
Cc: Yoshinori Sato 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

block: use memcpy_from_bvec in bio_copy_kern_endio_read

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

Use memcpy_from_bvec instead of open coding the logic.

Signed-off-by: Christoph Hellwig 
Reviewed-by: Martin K. Petersen 
Link: https://lore.kernel.org/r/20210727055646.118787-13-hch@lst.de
Signed-off-by: Jens Axboe

block: remove an incorrect check from blk_rq_append_bio

2021-04-12T12:45:12+00:00

blk_rq_append_bio is also used for the copy case, not just the map case,
so tis debug check is not correct.

Fixes: 393bb12e0058 ("block: stop calling blk_queue_bounce for passthrough requests")
Reported-by: Guenter Roeck 
Signed-off-by: Christoph Hellwig 
Tested-by: Guenter Roeck 
Reviewed-by: Himanshu Madhani 
Reviewed-by: Chaitanya Kulkarni 
Link: https://lore.kernel.org/r/20210409150447.1977410-1-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: 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