| Age | Commit message (Collapse) | Author |
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Add support for z10 HiperSockets multiwrite SBALs on output
queues. This is used on LPAR with EDDP enabled devices.
Signed-off-by: Klaus-Dieter Wacker <kdwacker@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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In cio_tpi only disable bottom halves when not in interrupt context.
Otherwise a WARN_ON gets triggered. Besides that, when we are in
interrupt context bottom halves are disabled anyway.
Fixes this one:
Badness at kernel/softirq.c:77
Modules linked in:
CPU: 2 Not tainted 2.6.26 #4
Process swapper (pid: 0, task: 000000003fe83db0, ksp: 000000003fea7d28)
Krnl PSW : 0404c00180000000 0000000000053f4e (__local_bh_disable+0xbe/0xcc)
R:0 T:1 IO:0 EX:0 Key:0 M:1 W:0 P:0 AS:3 CC:0 PM:0 EA:3
Krnl GPRS: 0000000000008ee0 00000000005f95e0 0000000000000000 0000000000000001
000000000020be92 0000000000000000 0000000000000210 00000000005d36c0
000000003fb5f4d8 0000000000000000 000000000020bed0 000000003fb5f3c8
00000000009be920 0000000000364898 000000003fb5f408 000000003fb5f3c8
Krnl Code: 0000000000053f42: bf2f1000 icm %r2,15,0(%r1)
0000000000053f46: a774ffc5 brc 7,53ed0
0000000000053f4a: a7f40001 brc 15,53f4c
>0000000000053f4e: a7280001 lhi %r2,1
0000000000053f52: 50201000 st %r2,0(%r1)
0000000000053f56: a7f4ffbd brc 15,53ed0
0000000000053f5a: 0707 bcr 0,%r7
0000000000053f5c: a7f13fc0 tmll %r15,16320
Call Trace:
([<0000000000000210>] 0x210)
[<0000000000053f86>] local_bh_disable+0x2a/0x38
[<000000000020bed0>] wait_cons_dev+0xd4/0x154
[<0000000000247cb2>] raw3215_make_room+0x6a/0x1a8
[<000000000024861a>] raw3215_write+0x86/0x28c
[<00000000002488a0>] con3215_write+0x80/0x110
[<000000000004c3e0>] __call_console_drivers+0xc8/0xe4
[<000000000004c47e>] _call_console_drivers+0x82/0xc4
[<000000000004c744>] release_console_sem+0x218/0x2c0
[<000000000004cf64>] vprintk+0x3c0/0x504
[<0000000000354a4a>] printk+0x52/0x64
[<0000000000088004>] __print_symbol+0x40/0x50
[<0000000000071dbc>] print_stack_trace+0x78/0xac
[<0000000000079e78>] print_lock_dependencies+0x148/0x208
[<000000000007a050>] print_irq_inversion_bug+0x118/0x15c
[<000000000007a106>] check_usage_forwards+0x72/0x84
[<000000000007a36e>] mark_lock+0x1d2/0x594
[<000000000007baca>] __lock_acquire+0x886/0xf48
[<000000000007c234>] lock_acquire+0xa8/0xe0
[<0000000000350316>] _write_lock+0x56/0x98
[<000000000026cd92>] zfcp_erp_adapter_reopen+0x4e/0x8c
[<000000000026f1e8>] zfcp_qdio_int_resp+0x2e4/0x2f4
[<00000000002210f4>] qdio_int_handler+0x274/0x888
[<00000000002177b6>] ccw_device_call_handler+0x6e/0xd8
[<0000000000215336>] ccw_device_irq+0xd6/0x160
[<0000000000212f88>] io_subchannel_irq+0x8c/0x118
[<000000000020c120>] do_IRQ+0x1d0/0x1fc
[<00000000000270b2>] io_return+0x0/0x8
[<000000000001c8a4>] cpu_idle+0x178/0x21c
([<000000000001c884>] cpu_idle+0x158/0x21c)
[<00000000003483a2>] start_secondary+0xb6/0xc8
INFO: lockdep is turned off.
Last Breaking-Event-Address:
[<0000000000053f4a>] __local_bh_disable+0xba/0xcc
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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In commit e6bafba5b4765a5a252f1b8d31cbf6d2459da337, a bug was fixed that
involved converting !x & y to !(x & y). The code below shows the same
pattern, and thus should perhaps be fixed in the same way. In particular,
the result of !scsw_stctl(&request->irb.scsw) & SCSW_STCTL_STATUS_PEND is
always just !scsw_stctl(&request->irb.scsw).
The semantic patch that makes this change is as follows:
(http://www.emn.fr/x-info/coccinelle/)
// <smpl>
@@ expression E; constant C; @@
(
!E & !C
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- !E & C
+ !(E & C)
)
// </smpl>
Signed-off-by: Julia Lawall <julia@diku.dk>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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Fix incorrect in- and output constraints, remove volatile declaration
of inline assembly parameters and reformat constraint declarations to
be more consistent.
Signed-off-by: Peter Oberparleiter <peter.oberparleiter@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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Convert remaining s390 users setting bus_id to dev_set_name()
or init_name.
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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Use dev_name() in the new qdio driver.
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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No need to define a static device for the kvm_s390 root device,
just use s390_root_dev_register().
This is needed for the bus_id rework
Acked-by: Carsten Otte <cotte@de.ibm.com>
Cc: Kay Sievers <kay.sievers@vrfy.org>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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Some further bus_id -> dev_name() conversions in s390 code.
Cc: Kay Sievers <kay.sievers@vrfy.org>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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Convert most s390 users setting bus_id to dev_set_name().
css and ccw busses are deferred since they need some special
treatment.
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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bus_id -> dev_name() conversions in s390 code.
[cornelia.huck@de.ibm.com: minor adaptions]
Signed-off-by: Kay Sievers <kay.sievers@vrfy.org>
Cc: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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Allow users to remove blacklisted ccw devices by using the
/proc/cio_ignore interface:
echo purge > /proc/cio_ignore
will remove all devices which are offline and blacklisted.
Signed-off-by: Peter Oberparleiter <peter.oberparleiter@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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Use dedicated slow path work queue when unregistering a device due to
a user action. This ensures serialialization of other register/
unregister requests.
Signed-off-by: Peter Oberparleiter <peter.oberparleiter@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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If an asynchronous HiperSockets queue runs full, no further packet
can be sent. In this case the next initiative to give transmitted
skbs back to the stack is triggered only by a 10-seconds qdio timer.
This timer has been introduced for low multicast traffic scenarios
to guarantee freeing of skbs in a limited amount of time. For high
HiperSocket multicast traffic scenarios progress checking on the
outbound queue should be enforced by tasklet rescheduling.
Signed-off-by: Ursula Braun <ursula.braun@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband: (29 commits)
RDMA/nes: Fix slab corruption
IB/mlx4: Set RLKEY bit for kernel QPs
RDMA/nes: Correct error_module bit mask
RDMA/nes: Fix routed RDMA connections
RDMA/nes: Enhanced PFT management scheme
RDMA/nes: Handle AE bounds violation
RDMA/nes: Limit critical error interrupts
RDMA/nes: Stop spurious MAC interrupts
RDMA/nes: Correct tso_wqe_length
RDMA/nes: Fill in firmware version for ethtool
RDMA/nes: Use ethtool timer value
RDMA/nes: Correct MAX TSO frags value
RDMA/nes: Enable MC/UC after changing MTU
RDMA/nes: Free NIC TX buffers when destroying NIC QP
RDMA/nes: Fix MDC setting
RDMA/nes: Add wqm_quanta module option
RDMA/nes: Module parameter permissions
RDMA/cxgb3: Set active_mtu in ib_port_attr
RDMA/nes: Add support for 4-port 1G HP blade card
RDMA/nes: Make mini_cm_connect() static
...
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* git://git.kernel.org/pub/scm/linux/kernel/git/agk/linux-2.6-dm:
dm: detect lost queue
dm: publish dm_vcalloc
dm: publish dm_table_unplug_all
dm: publish dm_get_mapinfo
dm: export struct dm_dev
dm crypt: avoid unnecessary wait when splitting bio
dm crypt: tidy ctx pending
dm crypt: fix async inc_pending
dm crypt: move dec_pending on error into write_io_submit
dm crypt: remove inc_pending from write_io_submit
dm crypt: tidy write loop pending
dm crypt: tidy crypt alloc
dm crypt: tidy inc pending
dm exception store: use chunk_t for_areas
dm exception store: introduce area_location function
dm raid1: kcopyd should stop on error if errors handled
dm mpath: remove is_active from struct dm_path
dm mpath: use more error codes
Fixed up trivial conflict in drivers/md/dm-mpath.c manually.
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* git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6: (37 commits)
[SCSI] zfcp: fix double dbf id usage
[SCSI] zfcp: wait on SCSI work to be finished before proceeding with init dev
[SCSI] zfcp: fix erp list usage without using locks
[SCSI] zfcp: prevent fc_remote_port_delete calls for unregistered rport
[SCSI] zfcp: fix deadlock caused by shared work queue tasks
[SCSI] zfcp: put threshold data in hba trace
[SCSI] zfcp: Simplify zfcp data structures
[SCSI] zfcp: Simplify get_adapter_by_busid
[SCSI] zfcp: remove all typedefs and replace them with standards
[SCSI] zfcp: attach and release SAN nameserver port on demand
[SCSI] zfcp: remove unused references, declarations and flags
[SCSI] zfcp: Update message with input from review
[SCSI] zfcp: add queue_full sysfs attribute
[SCSI] scsi_dh: suppress comparison warning
[SCSI] scsi_dh: add Dell product information into rdac device handler
[SCSI] qla2xxx: remove the unused SCSI_QLOGIC_FC_FIRMWARE option
[SCSI] qla2xxx: fix printk format warnings
[SCSI] qla2xxx: Update version number to 8.02.01-k8.
[SCSI] qla2xxx: Ignore payload reserved-bits during RSCN processing.
[SCSI] qla2xxx: Additional residual-count corrections during UNDERRUN handling.
...
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* 'for-2.6.28' of git://git.kernel.dk/linux-2.6-block: (132 commits)
doc/cdrom: Trvial documentation error, file not present
block_dev: fix kernel-doc in new functions
block: add some comments around the bio read-write flags
block: mark bio_split_pool static
block: Find bio sector offset given idx and offset
block: gendisk integrity wrapper
block: Switch blk_integrity_compare from bdev to gendisk
block: Fix double put in blk_integrity_unregister
block: Introduce integrity data ownership flag
block: revert part of d7533ad0e132f92e75c1b2eb7c26387b25a583c1
bio.h: Remove unused conditional code
block: remove end_{queued|dequeued}_request()
block: change elevator to use __blk_end_request()
gdrom: change to use __blk_end_request()
memstick: change to use __blk_end_request()
virtio_blk: change to use __blk_end_request()
blktrace: use BLKTRACE_BDEV_SIZE as the name size for setup structure
block: add lld busy state exporting interface
block: Fix blk_start_queueing() to not kick a stopped queue
include blktrace_api.h in headers_install
...
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We already did that a long time ago for pnp_system_init, but
pnpacpi_init and pnpbios_init remained as subsys_initcalls, and get
linked into the kernel before the arch-specific routines that finalize
the PCI resources (pci_subsys_init).
This means that the PnP routines would either register their resources
before the PCI layer could, or would be unable to check whether a PCI
resource had already been registered. Both are problematic.
I wanted to do this before 2.6.27, but every time we change something
like this, something breaks. That said, _every_ single time we trust
some firmware (like PnP tables) more than we trust the hardware itself
(like PCI probing), the problems have been worse.
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/jgarzik/libata-dev
* 'upstream-2.6.28' of git://git.kernel.org/pub/scm/linux/kernel/git/jgarzik/libata-dev:
ata_piix: IDE Mode SATA patch for Intel Ibex Peak DeviceIDs
libata-eh: clear UNIT ATTENTION after reset
ata_piix: add Hercules EC-900 mini-notebook to ich_laptop short cable list
libata: reorder ata_device to remove 8 bytes of padding on 64 bits
[libata] pata_bf54x: Add proper PM operation
pata_sil680: convert CONFIG_PPC_MERGE to CONFIG_PPC
libata: Implement disk shock protection support
[libata] Introduce ata_id_has_unload()
PATA: RPC now selects HAVE_PATA_PLATFORM for pata platform driver
ata_piix: drop merged SCR access and use slave_link instead
libata: implement slave_link
libata: misc updates to prepare for slave link
libata: reimplement link iterator
libata: make SCR access ops per-link
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Detect and report buggy drivers that destroy their request_queue.
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
Cc: Stefan Raspl <raspl@linux.vnet.ibm.com>
Cc: Jens Axboe <jens.axboe@oracle.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
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Publish dm_vcalloc in include/linux/device-mapper.h because this function is
used by targets.
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
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Publish dm_table_unplug_all in include/linux/device-mapper.h because this
function is used by targets.
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
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Publish dm_get_mapinfo in include/linux/device-mapper.h because this function
is used by targets.
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
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Split struct dm_dev in two and publish the part that other targets need in
include/linux/device-mapper.h.
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
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Don't wait between submitting crypt requests for a bio unless
we are short of memory.
There are two situations when we must split an encrypted bio:
1) there are no free pages;
2) the new bio would violate underlying device restrictions
(e.g. max hw segments).
In case (2) we do not need to wait.
Add output variable to crypt_alloc_buffer() to distinguish between
these cases.
Signed-off-by: Milan Broz <mbroz@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
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Move the initialisation of ctx->pending into one place, at the
start of crypt_convert().
Introduce crypt_finished to indicate whether or not the encryption
is finished, for use in a later patch.
No functional change.
Signed-off-by: Milan Broz <mbroz@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
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The pending reference count must be incremented *before* the async work is
queued to another thread, not after. Otherwise there's a race if the
work completes and decrements the reference count before it gets incremented.
Signed-off-by: Milan Broz <mbroz@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
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Make kcryptd_crypt_write_io_submit() responsible for decrementing
the pending count after an error.
Also fixes a bug in the async path that forgot to decrement it.
Signed-off-by: Milan Broz <mbroz@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
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Make the caller reponsible for incrementing the pending count before calling
kcryptd_crypt_write_io_submit() in the non-async case to bring it into line
with the async case.
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
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Move kcryptd_crypt_write_convert_loop inside kcryptd_crypt_write_convert.
This change is needed for a later patch.
No functional change.
Signed-off-by: Milan Broz <mbroz@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
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Factor out crypt io allocation code.
Later patches will call it from another place.
No functional change.
Signed-off-by: Milan Broz <mbroz@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
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Move io pending to one place.
No functional change, usefull to simplify debugging.
Signed-off-by: Milan Broz <mbroz@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
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Change uint32_t into chunk_t to remove 32-bit limitation on the
number of chunks on systems with 64-bit sector numbers.
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
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Move this logic to a function, because it will be reused later.
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
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dm-raid1 is setting the 'DM_KCOPYD_IGNORE_ERROR' flag unconditionally
when assigning kcopyd work. kcopyd is responsible for copying an
assigned section of disk to one or more other disks. The
'DM_KCOPYD_IGNORE_ERROR' flag affects kcopyd in the following way:
When not set:
kcopyd will immediately stop the copy operation when an error is
encountered.
When set:
kcopyd will try to proceed regardless of errors and try to continue
copying any remaining amount.
Since dm-raid1 tracks regions of the address space that are (or
are not) in sync and it now has the ability to handle these
errors, we can safely enable this optimization. This optimization
is conditional on whether mirror error handling has been enabled.
Signed-off-by: Jonathan Brassow <jbrassow@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
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This patch moves 'is_active' from struct dm_path to struct pgpath
as it does not need exporting.
Signed-off-by: Kiyoshi Ueda <k-ueda@ct.jp.nec.com>
Signed-off-by: Jun'ichi Nomura <j-nomura@ce.jp.nec.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
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This patch allows path errors from the multipath ctr function to
propagate up to userspace as errno values from the ioctl() call.
This is in response to
https://www.redhat.com/archives/dm-devel/2008-May/msg00000.html
and
https://bugzilla.redhat.com/show_bug.cgi?id=444421
The patch only lets through the errors that it needs to in order to
get the path errors from parse_path().
Signed-off-by: Benjamin Marzinski <bmarzins@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
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'mlx4', 'mthca' and 'nes' into for-next
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Referencing cm_node after it is freed via rem_ref_cm_node() causes a
slab corruption. There is no need to set cm_node->cm_id to NULL in
mini_cm_close().
Signed-off-by: Chien Tung <ctung@neteffect.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
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Enable driver checking of the DMI product name (when enabled) on
an Abit AT8 32X, instead of falling back to a manual probe. This
eliminates false negatives and eventually will help avoid
unnecessary bus probes on unsupported mainboards.
Signed-off-by: Alistair John Strachan <alistair@devzero.co.uk>
Tested-by: Daniel Exner <dex@dragonslave.de>
Acked-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
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The table for the Abit AT8 32X was incorrectly missing an entry
for the sixth ("AUX3") fan. Add this entry, exporting the fan
reading to userspace.
Closes lm-sensors.org ticket #2339.
Signed-off-by: Alistair John Strachan <alistair@devzero.co.uk>
Tested-by: Daniel Exner <dex@dragonslave.de>
Acked-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
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On the Shuttle SN68PT, FAN_CTL2 is apparently not connected to a fan,
but to something else. One user has reported instant system power-off
when changing the PWM2 duty cycle, so we disable it.
I use the board name string as the trigger in case the same board is
ever used in other systems.
This closes lm-sensors ticket #2349:
pwmconfig causes a hard poweroff
http://www.lm-sensors.org/ticket/2349
Signed-off-by: Jean Delvare <khali@linux-fr.org>
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Creates a name file in the sysfs directory, that
is needed for the libsensors library to work.
Also rename fan1_pwm to pwm1 and scale its value as needed.
This fixes bug #11520:
http://bugzilla.kernel.org/show_bug.cgi?id=11520
Signed-off-by: Corentin Chary <corentincj@iksaif.net>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
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Since all bio_split calls refer the same single bio_split_pool, the bio_split
function can use bio_split_pool directly instead of the mempool_t parameter;
then the mempool_t parameter can be removed from bio_split param list, and
bio_split_pool is only referred in fs/bio.c file, can be marked static.
Signed-off-by: Denis ChengRq <crquan@gmail.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
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This patch converts gdrom to use __blk_end_request() directly
so that end_{queued|dequeued}_request() can be removed.
gd.transfer is '1' in error cases and '0' in non-error cases,
so gdrom hasn't been propagating any error code to the block layer.
We can just convert error cases to '-EIO'.
Signed-off-by: Kiyoshi Ueda <k-ueda@ct.jp.nec.com>
Signed-off-by: Jun'ichi Nomura <j-nomura@ce.jp.nec.com>
Cc: Adrian McMenamin <adrian@mcmen.demon.co.uk>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
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This patch converts memstick to use __blk_end_request() directly
so that end_{queued|dequeued}_request() can be removed.
Signed-off-by: Kiyoshi Ueda <k-ueda@ct.jp.nec.com>
Signed-off-by: Jun'ichi Nomura <j-nomura@ce.jp.nec.com>
Cc: Alex Dubov <oakad@yahoo.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
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This patch converts virtio_blk to use __blk_end_request() directly
so that end_{queued|dequeued}_request() can be removed.
Related 'uptodate' argument is converted to 'error'.
Signed-off-by: Kiyoshi Ueda <k-ueda@ct.jp.nec.com>
Signed-off-by: Jun'ichi Nomura <j-nomura@ce.jp.nec.com>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
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SSD devices should give an RPM setting of 1 in word 217 of the ID
page. If we see such a device, tell the block layer about it.
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
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The current floppy_struct allows floppies to number sectors starting
from 0 or 1. This patch allows arbitrary first-sector numbers - for
example, 0xC1 for Amstrad CPC disks.
This extends the existing 1-bit field (FD_ZEROBASED, bit 2 of stretch)
to 8 bits (FD_SECTMASK, bits 2 to 9).
Currently 0x00 denotes a first sector number of 1, and 0x01 denotes a
first sector number of 0. We extend this by interpreting FD_SECTMASK
as the first sector number with the LSB flipped.
Signed-off-by: Keith Wansbrough <keith@lochan.org>
Cc: Alain Knaff <alain@linux.lu>
Cc: Michael Kerrisk <mtk.manpages@googlemail.com>
Cc: Karel Zak <kzak@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
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The kernel.h macro DIV_ROUND_UP performs the computation (((n) + (d) - 1) /
(d)) but is perhaps more readable.
An extract of the semantic patch that makes this change is as follows:
(http://www.emn.fr/x-info/coccinelle/)
// <smpl>
@haskernel@
@@
#include <linux/kernel.h>
@depends on haskernel@
expression n,d;
@@
(
- (n + d - 1) / d
+ DIV_ROUND_UP(n,d)
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- (n + (d - 1)) / d
+ DIV_ROUND_UP(n,d)
)
@depends on haskernel@
expression n,d;
@@
- DIV_ROUND_UP((n),d)
+ DIV_ROUND_UP(n,d)
@depends on haskernel@
expression n,d;
@@
- DIV_ROUND_UP(n,(d))
+ DIV_ROUND_UP(n,d)
// </smpl>
Signed-off-by: Julia Lawall <julia@diku.dk>
Cc: <mike.miller@hp.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
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