linux-toradex.git/block/compat_ioctl.c, branch v4.14-rc4

compat_hdio_ioctl: Fix a declaration

2017-08-31T21:32:41+00:00

This patch avoids that sparse reports the following warning messages:

block/compat_ioctl.c:85:11: warning: incorrect type in assignment (different address spaces)
block/compat_ioctl.c:85:11:    expected unsigned long *[noderef] p
block/compat_ioctl.c:85:11:    got void [noderef] *
block/compat_ioctl.c:91:21: warning: incorrect type in argument 1 (different address spaces)
block/compat_ioctl.c:91:21:    expected void const volatile [noderef] *
block/compat_ioctl.c:91:21:    got unsigned long *[noderef] p
block/compat_ioctl.c:87:53: warning: dereference of noderef expression
block/compat_ioctl.c:91:21: warning: dereference of noderef expression

Fixes: commit d597580d3737 ("generic ...copy_..._user primitives")
Signed-off-by: Bart Van Assche 
Cc: Jens Axboe 
Signed-off-by: Al Viro

compat_hdio_ioctl: get rid of set_fs()

2017-06-29T22:17:52+00:00

Signed-off-by: Al Viro

take floppy compat ioctls to sodding floppy.c

2017-06-29T22:17:39+00:00

all other drivers recognizing those ioctls are very much *not*
biarch.

Signed-off-by: Al Viro

block: remove the discard_zeroes_data flag

2017-04-08T17:25:38+00:00

Now that we use the proper REQ_OP_WRITE_ZEROES operation everywhere we can
kill this hack.

Signed-off-by: Christoph Hellwig 
Reviewed-by: Martin K. Petersen 
Reviewed-by: Hannes Reinecke 
Signed-off-by: Jens Axboe

block: Get rid of blk_get_backing_dev_info()

2017-02-02T15:21:32+00:00

blk_get_backing_dev_info() is now a simple dereference. Remove that
function and simplify some code around that.

Signed-off-by: Jan Kara 
Signed-off-by: Jens Axboe

mm, fs: get rid of PAGE_CACHE_* and page_cache_{get,release} macros

2016-04-04T17:41:08+00:00

PAGE_CACHE_{SIZE,SHIFT,MASK,ALIGN} macros were introduced *long* time
ago with promise that one day it will be possible to implement page
cache with bigger chunks than PAGE_SIZE.

This promise never materialized.  And unlikely will.

We have many places where PAGE_CACHE_SIZE assumed to be equal to
PAGE_SIZE.  And it's constant source of confusion on whether
PAGE_CACHE_* or PAGE_* constant should be used in a particular case,
especially on the border between fs and mm.

Global switching to PAGE_CACHE_SIZE != PAGE_SIZE would cause to much
breakage to be doable.

Let's stop pretending that pages in page cache are special.  They are
not.

The changes are pretty straight-forward:

 -  << (PAGE_CACHE_SHIFT - PAGE_SHIFT) -> ;

 -  >> (PAGE_CACHE_SHIFT - PAGE_SHIFT) -> ;

 - PAGE_CACHE_{SIZE,SHIFT,MASK,ALIGN} -> PAGE_{SIZE,SHIFT,MASK,ALIGN};

 - page_cache_get() -> get_page();

 - page_cache_release() -> put_page();

This patch contains automated changes generated with coccinelle using
script below.  For some reason, coccinelle doesn't patch header files.
I've called spatch for them manually.

The only adjustment after coccinelle is revert of changes to
PAGE_CAHCE_ALIGN definition: we are going to drop it later.

There are few places in the code where coccinelle didn't reach.  I'll
fix them manually in a separate patch.  Comments and documentation also
will be addressed with the separate patch.

virtual patch

@@
expression E;
@@
- E << (PAGE_CACHE_SHIFT - PAGE_SHIFT)
+ E

@@
expression E;
@@
- E >> (PAGE_CACHE_SHIFT - PAGE_SHIFT)
+ E

@@
@@
- PAGE_CACHE_SHIFT
+ PAGE_SHIFT

@@
@@
- PAGE_CACHE_SIZE
+ PAGE_SIZE

@@
@@
- PAGE_CACHE_MASK
+ PAGE_MASK

@@
expression E;
@@
- PAGE_CACHE_ALIGN(E)
+ PAGE_ALIGN(E)

@@
expression E;
@@
- page_cache_get(E)
+ get_page(E)

@@
expression E;
@@
- page_cache_release(E)
+ put_page(E)

Signed-off-by: Kirill A. Shutemov 
Acked-by: Michal Hocko 
Signed-off-by: Linus Torvalds

block, bdi: an active gendisk always has a request_queue associated with it

2014-09-08T16:00:35+00:00

bdev_get_queue() returns the request_queue associated with the
specified block_device.  blk_get_backing_dev_info() makes use of
bdev_get_queue() to determine the associated bdi given a block_device.

All the callers of bdev_get_queue() including
blk_get_backing_dev_info() assume that bdev_get_queue() may return
NULL and implement NULL handling; however, bdev_get_queue() requires
the passed in block_device is opened and attached to its gendisk.
Because an active gendisk always has a valid request_queue associated
with it, bdev_get_queue() can never return NULL and neither can
blk_get_backing_dev_info().

Make it clear that neither of the two functions can return NULL and
remove NULL handling from all the callers.

Signed-off-by: Tejun Heo 
Cc: Chris Mason 
Cc: Dave Chinner 
Signed-off-by: Jens Axboe

Merge branch 'for-3.17/core' of git://git.kernel.dk/linux-block

2014-08-14T15:07:02+00:00

Pull block core bits from Jens Axboe:
 "Small round this time, after the massive blk-mq dump for 3.16.  This
  pull request contains:

   - Fixes for max_sectors overflow in ioctls from Akinoby Mita.

   - Partition off-by-one bug fix in aix partitions from Dan Carpenter.

   - Various small partition cleanups from Fabian Frederick.

   - Fix for the block integrity code sometimes returning the wrong
     vector count from Gu Zheng.

   - Cleanup an re-org of the blk-mq queue enter/exit percpu counters
     from Tejun.  Dependent on the percpu pull for 3.17 (which was in
     the block tree too), that you have already pulled in.

   - A blkcg oops fix, also from Tejun"

* 'for-3.17/core' of git://git.kernel.dk/linux-block:
  partitions: aix.c: off by one bug
  blkcg: don't call into policy draining if root_blkg is already gone
  Revert "bio: modify __bio_add_page() to accept pages that don't start a new segment"
  bio: modify __bio_add_page() to accept pages that don't start a new segment
  block: fix SG_[GS]ET_RESERVED_SIZE ioctl when max_sectors is huge
  block: fix BLKSECTGET ioctl when max_sectors is greater than USHRT_MAX
  block/partitions/efi.c: kerneldoc fixing
  block/partitions/msdos.c: code clean-up
  block/partitions/amiga.c: replace nolevel printk by pr_err
  block/partitions/aix.c: replace count*size kzalloc by kcalloc
  bio-integrity: add "bip_max_vcnt" into struct bio_integrity_payload
  blk-mq: use percpu_ref for mq usage count
  blk-mq: collapse __blk_mq_drain_queue() into blk_mq_freeze_queue()
  blk-mq: decouble blk-mq freezing from generic bypassing
  block, blk-mq: draining can't be skipped even if bypass_depth was non-zero
  blk-mq: fix a memory ordering bug in blk_mq_queue_enter()

block: provide compat ioctl for BLKZEROOUT

2014-07-14T10:27:20+00:00

This patch provides the compat BLKZEROOUT ioctl. The argument is a pointer
to two uint64_t values, so there is no need to translate it.

Signed-off-by: Mikulas Patocka 
Cc: stable@vger.kernel.org	# 3.7+
Acked-by: Martin K. Petersen 
Signed-off-by: Jens Axboe

block: fix BLKSECTGET ioctl when max_sectors is greater than USHRT_MAX

2014-07-01T16:43:07+00:00

BLKSECTGET ioctl loads the request queue's max_sectors as unsigned
short value to the argument pointer.  So if the max_sector is greater
than USHRT_MAX, the upper 16 bits of that is just discarded.

In such case, USHRT_MAX is more preferable than the lower 16 bits of
max_sectors.

Signed-off-by: Akinobu Mita 
Cc: Jens Axboe 
Cc: "James E.J. Bottomley" 
Cc: Douglas Gilbert 
Cc: linux-scsi@vger.kernel.org
Reviewed-by: Christoph Hellwig 
Signed-off-by: Jens Axboe