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path: root/drivers/block/umem.c
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2012-07-31blk: pass from_schedule to non-request unplug functions.NeilBrown
This will allow md/raid to know why the unplug was called, and will be able to act according - if !from_schedule it is safe to perform tasks which could themselves schedule. Signed-off-by: NeilBrown <neilb@suse.de> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2012-07-31blk: centralize non-request unplug handling.NeilBrown
Both md and umem has similar code for getting notified on an blk_finish_plug event. Centralize this code in block/ and allow each driver to provide its distinctive difference. Signed-off-by: NeilBrown <neilb@suse.de> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2012-06-13umem: fix up unpluggingTao Guo
Fix a regression introduced by 7eaceaccab5f40 ("block: remove per-queue plugging"). In that patch, Jens removed the whole mm_unplug_device() function, which used to be the trigger to make umem start to work. We need to implement unplugging to make umem start to work, or I/O will never be triggered. Signed-off-by: Tao Guo <Tao.Guo@emc.com> Cc: Neil Brown <neilb@suse.de> Cc: Jens Axboe <axboe@kernel.dk> Cc: Shaohua Li <shli@kernel.org> Cc: <stable@vger.kernel.org> Acked-by: NeilBrown <neilb@suse.de> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2011-09-12block: remove support for bio remapping from ->make_requestChristoph Hellwig
There is very little benefit in allowing to let a ->make_request instance update the bios device and sector and loop around it in __generic_make_request when we can archive the same through calling generic_make_request from the driver and letting the loop in generic_make_request handle it. Note that various drivers got the return value from ->make_request and returned non-zero values for errors. Signed-off-by: Christoph Hellwig <hch@lst.de> Acked-by: NeilBrown <neilb@suse.de> Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
2011-03-10Merge branch 'for-2.6.39/stack-plug' into for-2.6.39/coreJens Axboe
Conflicts: block/blk-core.c block/blk-flush.c drivers/md/raid1.c drivers/md/raid10.c drivers/md/raid5.c fs/nilfs2/btnode.c fs/nilfs2/mdt.c Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
2011-03-10block: remove per-queue pluggingJens Axboe
Code has been converted over to the new explicit on-stack plugging, and delay users have been converted to use the new API for that. So lets kill off the old plugging along with aops->sync_page(). Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
2011-03-09umem: Drop dummy ->media_changed()Tejun Heo
umem doesn't implement media changed detection and there's no need to implement dummy callback anymore. Remove it. Signed-off-by: Tejun Heo <tj@kernel.org> Cc: Jens Axboe <axboe@kernel.dk> Cc: Kay Sievers <kay.sievers@vrfy.org>
2010-08-07block: unify flags for struct bio and struct requestChristoph Hellwig
Remove the current bio flags and reuse the request flags for the bio, too. This allows to more easily trace the type of I/O from the filesystem down to the block driver. There were two flags in the bio that were missing in the requests: BIO_RW_UNPLUG and BIO_RW_AHEAD. Also I've renamed two request flags that had a superflous RW in them. Note that the flags are in bio.h despite having the REQ_ name - as blkdev.h includes bio.h that is the only way to go for now. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
2010-03-30include cleanup: Update gfp.h and slab.h includes to prepare for breaking ↵Tejun Heo
implicit slab.h inclusion from percpu.h percpu.h is included by sched.h and module.h and thus ends up being included when building most .c files. percpu.h includes slab.h which in turn includes gfp.h making everything defined by the two files universally available and complicating inclusion dependencies. percpu.h -> slab.h dependency is about to be removed. Prepare for this change by updating users of gfp and slab facilities include those headers directly instead of assuming availability. As this conversion needs to touch large number of source files, the following script is used as the basis of conversion. http://userweb.kernel.org/~tj/misc/slabh-sweep.py The script does the followings. * Scan files for gfp and slab usages and update includes such that only the necessary includes are there. ie. if only gfp is used, gfp.h, if slab is used, slab.h. * When the script inserts a new include, it looks at the include blocks and try to put the new include such that its order conforms to its surrounding. It's put in the include block which contains core kernel includes, in the same order that the rest are ordered - alphabetical, Christmas tree, rev-Xmas-tree or at the end if there doesn't seem to be any matching order. * If the script can't find a place to put a new include (mostly because the file doesn't have fitting include block), it prints out an error message indicating which .h file needs to be added to the file. The conversion was done in the following steps. 1. The initial automatic conversion of all .c files updated slightly over 4000 files, deleting around 700 includes and adding ~480 gfp.h and ~3000 slab.h inclusions. The script emitted errors for ~400 files. 2. Each error was manually checked. Some didn't need the inclusion, some needed manual addition while adding it to implementation .h or embedding .c file was more appropriate for others. This step added inclusions to around 150 files. 3. The script was run again and the output was compared to the edits from #2 to make sure no file was left behind. 4. Several build tests were done and a couple of problems were fixed. e.g. lib/decompress_*.c used malloc/free() wrappers around slab APIs requiring slab.h to be added manually. 5. The script was run on all .h files but without automatically editing them as sprinkling gfp.h and slab.h inclusions around .h files could easily lead to inclusion dependency hell. Most gfp.h inclusion directives were ignored as stuff from gfp.h was usually wildly available and often used in preprocessor macros. Each slab.h inclusion directive was examined and added manually as necessary. 6. percpu.h was updated not to include slab.h. 7. Build test were done on the following configurations and failures were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my distributed build env didn't work with gcov compiles) and a few more options had to be turned off depending on archs to make things build (like ipr on powerpc/64 which failed due to missing writeq). * x86 and x86_64 UP and SMP allmodconfig and a custom test config. * powerpc and powerpc64 SMP allmodconfig * sparc and sparc64 SMP allmodconfig * ia64 SMP allmodconfig * s390 SMP allmodconfig * alpha SMP allmodconfig * um on x86_64 SMP allmodconfig 8. percpu.h modifications were reverted so that it could be applied as a separate patch and serve as bisection point. Given the fact that I had only a couple of failures from tests on step 6, I'm fairly confident about the coverage of this conversion patch. If there is a breakage, it's likely to be something in one of the arch headers which should be easily discoverable easily on most builds of the specific arch. Signed-off-by: Tejun Heo <tj@kernel.org> Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
2009-09-22const: make block_device_operations constAlexey Dobriyan
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-04-24umem: fix request_queue lock warningSage Weil
The umem driver issues two warnings on boot, due to blk_plug_device() and blk_remove_plug() being called without q->queue_lock held. Starting with e48ec690 (block: extend queue_flag bitops), the queue_flag_* functions warn if q->queue_lock doesn't appear to be locked. In fact, q->queue_lock is NULL (though that apparently isn't otherwise a problem as the driver is using card->lock for everything). Although blk_init_queue() with take a request_fn_proc and spinlock_t*, there isn't a corresponding init helper that takes a make_request_fn. Setting queue_lock to &card->lock explicitly seems to work fine for me. The warning goes away and the device appears to behave. [ 1.531881] v2.3 : Micro Memory(tm) PCI memory board block driver [ 1.538136] umem 0000:02:01.0: PCI INT A -> GSI 20 (level, low) -> IRQ 20 [ 1.545018] umem 0000:02:01.0: Micro Memory(tm) controller found (PCI Mem Module (Battery Backup)) [ 1.554176] umem 0000:02:01.0: CSR 0xfc9ffc00 -> 0xffffc200013d0c00 (0x100) [ 1.561279] umem 0000:02:01.0: Size 1048576 KB, Battery 1 Disabled (FAILURE), Battery 2 Disabled (FAILURE) [ 1.571114] umem 0000:02:01.0: Window size 16777216 bytes, IRQ 20 [ 1.577304] umem 0000:02:01.0: memory NOT initialized. Consider over-writing whole device. [ 1.585989] umema:<4>------------[ cut here ]------------ [ 1.591775] WARNING: at include/linux/blkdev.h:492 blk_plug_device+0x6d/0x106() [ 1.592025] Hardware name: H8SSL [ 1.592025] Modules linked in: [ 1.592025] Pid: 1, comm: swapper Not tainted 2.6.29 #8 [ 1.592025] Call Trace: [ 1.592025] [<ffffffff8023c994>] warn_slowpath+0xd3/0xf2 [ 1.592025] [<ffffffff8025a5b5>] ? save_trace+0x3f/0x9b [ 1.592025] [<ffffffff8025a68b>] ? add_lock_to_list+0x7a/0xba [ 1.592025] [<ffffffff8025e609>] ? validate_chain+0xb3b/0xce8 [ 1.592025] [<ffffffff80441556>] ? mm_make_request+0x27/0x59 [ 1.592025] [<ffffffff80441556>] ? mm_make_request+0x27/0x59 [ 1.592025] [<ffffffff8025ef04>] ? __lock_acquire+0x74e/0x7b9 [ 1.592025] [<ffffffff8025a70e>] ? get_lock_stats+0x34/0x5e [ 1.592025] [<ffffffff8025a746>] ? put_lock_stats+0xe/0x27 [ 1.592025] [<ffffffff80441556>] ? mm_make_request+0x27/0x59 [ 1.592025] [<ffffffff803ad165>] blk_plug_device+0x6d/0x106 [ 1.592025] [<ffffffff80441575>] mm_make_request+0x46/0x59 [ 1.592025] [<ffffffff803ac2d9>] generic_make_request+0x335/0x3cf [ 1.592025] [<ffffffff8027fcc7>] ? mempool_alloc_slab+0x11/0x13 [ 1.592025] [<ffffffff8027fdce>] ? mempool_alloc+0x45/0x101 [ 1.592025] [<ffffffff8025a746>] ? put_lock_stats+0xe/0x27 [ 1.592025] [<ffffffff803adda5>] submit_bio+0x10a/0x119 [ 1.592025] [<ffffffff802c8d00>] submit_bh+0xe5/0x109 [ 1.592025] [<ffffffff802cbf43>] block_read_full_page+0x2aa/0x2cb [ 1.592025] [<ffffffff802cf4c4>] ? blkdev_get_block+0x0/0x4c [ 1.592025] [<ffffffff805c90a8>] ? _spin_unlock_irq+0x36/0x51 [ 1.592025] [<ffffffff80286836>] ? __lru_cache_add+0x92/0xb2 [ 1.592025] [<ffffffff802cf008>] blkdev_readpage+0x13/0x15 [ 1.592025] [<ffffffff8027de06>] read_cache_page_async+0x90/0x134 [ 1.592025] [<ffffffff802ceff5>] ? blkdev_readpage+0x0/0x15 [ 1.592025] [<ffffffff802f5f1c>] ? adfspart_check_ICS+0x0/0x16c [ 1.592025] [<ffffffff8027deb8>] read_cache_page+0xe/0x45 [ 1.592025] [<ffffffff802f5170>] read_dev_sector+0x2e/0x93 [ 1.592025] [<ffffffff802f5f44>] adfspart_check_ICS+0x28/0x16c [ 1.592025] [<ffffffff8025d427>] ? trace_hardirqs_on+0xd/0xf [ 1.592025] [<ffffffff802f5f1c>] ? adfspart_check_ICS+0x0/0x16c [ 1.592025] [<ffffffff802f59c5>] rescan_partitions+0x168/0x2fb [ 1.592025] [<ffffffff802ceae9>] __blkdev_get+0x259/0x336 [ 1.592025] [<ffffffff803ca1e2>] ? kobject_put+0x47/0x4b [ 1.592025] [<ffffffff802cebd1>] blkdev_get+0xb/0xd [ 1.592025] [<ffffffff802f5773>] register_disk+0xc4/0x12b [ 1.592025] [<ffffffff803b2a7b>] add_disk+0xc3/0x12d [ 1.592025] [<ffffffff808a1d4a>] ? mm_init+0x0/0x1a5 [ 1.592025] [<ffffffff808a1e73>] mm_init+0x129/0x1a5 [ 1.592025] [<ffffffff808a1d4a>] ? mm_init+0x0/0x1a5 [ 1.592025] [<ffffffff80209056>] _stext+0x56/0x130 [ 1.592025] [<ffffffff80274932>] ? register_irq_proc+0xae/0xca [ 1.592025] [<ffffffff802f0000>] ? proc_pid_lookup+0xb4/0x18b [ 1.592025] [<ffffffff8087f975>] kernel_init+0x132/0x18b [ 1.592025] [<ffffffff8020d17a>] child_rip+0xa/0x20 [ 1.592025] [<ffffffff8020cb40>] ? restore_args+0x0/0x30 [ 1.592025] [<ffffffff8087f843>] ? kernel_init+0x0/0x18b [ 1.592025] [<ffffffff8020d170>] ? child_rip+0x0/0x20 [ 1.592025] ---[ end trace 7150b3b86da74e1e ]--- [ 1.889858] ------------[ cut here ]------------[ve_plug+0x5f/0x91() [ 1.893848] Hardware name: H8SSL [ 1.893848] Modules linked in: [ 1.893848] Pid: 1, comm: swapper Tainted: G W 2.6.29 #8 [ 1.893848] Call Trace: [ 1.893848] [<ffffffff8023c994>] warn_slowpath+0xd3/0xf2 [ 1.893848] [<ffffffff805c8411>] ? trace_hardirqs_on_thunk+0x3a/0x3f [ 1.893848] [<ffffffff8020cb40>] ? restore_args+0x0/0x30 [ 1.893848] [<ffffffff80254245>] ? __atomic_notifier_call_chain+0x0/0xb2 [ 1.893848] [<ffffffff805c90a3>] ? _spin_unlock_irq+0x31/0x51 [ 1.893848] [<ffffffff805c90bf>] ? _spin_unlock_irq+0x4d/0x51 [ 1.893848] [<ffffffff8044157d>] ? mm_make_request+0x4e/0x59 [ 1.893848] [<ffffffff8025a70e>] ? get_lock_stats+0x34/0x5e [ 1.893848] [<ffffffff8025a75d>] ? put_lock_stats+0x25/0x27 [ 1.893848] [<ffffffff80441504>] ? mm_unplug_device+0x25/0x50 [ 1.893848] [<ffffffff803acf23>] blk_remove_plug+0x5f/0x91 [ 1.893848] [<ffffffff8044150f>] mm_unplug_device+0x30/0x50 [ 1.893848] [<ffffffff803ab74a>] blk_unplug+0x78/0x7d [ 1.893848] [<ffffffff803ab75c>] blk_backing_dev_unplug+0xd/0xf [ 1.893848] [<ffffffff802c853c>] block_sync_page+0x4a/0x4c [ 1.893848] [<ffffffff8027da1c>] sync_page+0x44/0x4d [ 1.893848] [<ffffffff805c66fd>] __wait_on_bit_lock+0x42/0x8a [ 1.893848] [<ffffffff8027d9d8>] ? sync_page+0x0/0x4d [ 1.893848] [<ffffffff8027d9c4>] __lock_page+0x64/0x6b [ 1.893848] [<ffffffff802508db>] ? wake_bit_function+0x0/0x2a [ 1.893848] [<ffffffff8027de4a>] read_cache_page_async+0xd4/0x134 [ 1.893848] [<ffffffff802ceff5>] ? blkdev_readpage+0x0/0x15 [ 1.893848] [<ffffffff802f5f1c>] ? adfspart_check_ICS+0x0/0x16c [ 1.893848] [<ffffffff8027deb8>] read_cache_page+0xe/0x45 [ 1.893848] [<ffffffff802f5170>] read_dev_sector+0x2e/0x93 [ 1.893848] [<ffffffff802f5f44>] adfspart_check_ICS+0x28/0x16c [ 1.893848] [<ffffffff8025d427>] ? trace_hardirqs_on+0xd/0xf [ 1.893848] [<ffffffff802f5f1c>] ? adfspart_check_ICS+0x0/0x16c [ 1.893848] [<ffffffff802f59c5>] rescan_partitions+0x168/0x2fb [ 1.893848] [<ffffffff802ceae9>] __blkdev_get+0x259/0x336 [ 1.893848] [<ffffffff803ca1e2>] ? kobject_put+0x47/0x4b [ 1.893848] [<ffffffff802cebd1>] blkdev_get+0xb/0xd [ 1.893848] [<ffffffff802f5773>] register_disk+0xc4/0x12b [ 1.893848] [<ffffffff803b2a7b>] add_disk+0xc3/0x12d [ 1.893848] [<ffffffff808a1d4a>] ? mm_init+0x0/0x1a5 [ 1.893848] [<ffffffff808a1e73>] mm_init+0x129/0x1a5 [ 1.893848] [<ffffffff808a1d4a>] ? mm_init+0x0/0x1a5 [ 1.893848] [<ffffffff80209056>] _stext+0x56/0x130 [ 1.893848] [<ffffffff80274932>] ? register_irq_proc+0xae/0xca [ 1.893848] [<ffffffff802f0000>] ? proc_pid_lookup+0xb4/0x18b [ 1.893848] [<ffffffff8087f975>] kernel_init+0x132/0x18b [ 1.893848] [<ffffffff8020d17a>] child_rip+0xa/0x20 [ 1.893848] [<ffffffff8020cb40>] ? restore_args+0x0/0x30 [ 1.893848] [<ffffffff8087f843>] ? kernel_init+0x0/0x18b [ 1.893848] [<ffffffff8020d170>] ? child_rip+0x0/0x20 [ 1.893848] ---[ end trace 7150b3b86da74e1f ]--- Signed-off-by: Sage Weil <sage@newdream.net> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2009-04-07dma-mapping: replace all DMA_32BIT_MASK macro with DMA_BIT_MASK(32)Yang Hongyang
Replace all DMA_32BIT_MASK macro with DMA_BIT_MASK(32) Signed-off-by: Yang Hongyang<yanghy@cn.fujitsu.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-04-07dma-mapping: replace all DMA_64BIT_MASK macro with DMA_BIT_MASK(64)Yang Hongyang
Replace all DMA_64BIT_MASK macro with DMA_BIT_MASK(64) Signed-off-by: Yang Hongyang<yanghy@cn.fujitsu.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-12-18Cleanup umem driver: fix most checkpatch warnings, conform to kernelRandy Dunlap
coding style. linux-2.6.24-rc5-git3> checkpatch.pl-next patches/block-umem-ckpatch.patch total: 0 errors, 5 warnings, 530 lines checked All of these are line-length warnings. Only change in generated object file is due to not initializing a static global variable to 0. Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2007-12-11Fix NULL dereference in umem.cNeil Brown
Fix NULL dereference in umem.c Signed-off-by: Neil Brown <neilb@suse.de> Tested-by: Dave Chinner <dgc@sgi.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-10-10drivers/block/umem: use DRIVER_NAME where appropriateJeff Garzik
Signed-off-by: Jeff Garzik <jeff@garzik.org>
2007-10-10drivers/block/umem: trim trailing whitespaceJeff Garzik
Signed-off-by: Jeff Garzik <jeff@garzik.org>
2007-10-10drivers/block/umem: minor cleanupsJeff Garzik
* tab-align DRIVER_*, pci_driver entries * reduced wasted memory by killing unused struct cardinfo members * move free_irq() call above resource unmap, to fix tiny window where irq handler may access recently-unmapped memory * propagate pci_enable_device() return value * use pci_request_regions, pci_release_regions() for resource reservation * call pci_disable_device() in pci_driver::remove() Signed-off-by: Jeff Garzik <jeff@garzik.org>
2007-10-10drivers/block/umem: use dev_printk()Jeff Garzik
dev_printk() gives us a consistent prefix (driver name + PCI bus id), which allows us to eliminate the hand-rolled one. Also allows us to eliminate card->card_number, which was used solely in printk() calls. Signed-off-by: Jeff Garzik <jeff@garzik.org>
2007-10-10drivers/block/umem: move private include away from include/linuxJeff Garzik
Move include/linux/umem.h to drivers/block, as umem.c is the only user, and its not an exported header. Move the PCI_{VENDOR,DEVICE}_ID_* constants to include/linux/pci_ids.h. Signed-off-by: Jeff Garzik <jeff@garzik.org>
2007-10-10Drop 'size' argument from bio_endio and bi_end_ioNeilBrown
As bi_end_io is only called once when the reqeust is complete, the 'size' argument is now redundant. Remove it. Now there is no need for bio_endio to subtract the size completed from bi_size. So don't do that either. While we are at it, change bi_end_io to return void. Signed-off-by: Neil Brown <neilb@suse.de> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2007-10-10Fix various abuse of bio fields in umem.cNeilBrown
umem.c: advances bi_idx and bi_sector to track where it is up to. But it is only ever doing this on one bio, so the updated fields can easily be kept elsewhere (current_*). updates bi_size, but never uses the updated values, so this isn't needed. reuses bi_phys_segments to count how many iovecs have been completely. As the completion happens sequentiually, we can store this information outside the bio too. Signed-off-by: Neil Brown <neilb@suse.de> diff .prev/drivers/block/umem.c ./drivers/block/umem.c Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2007-07-24[BLOCK] Get rid of request_queue_t typedefJens Axboe
Some of the code has been gradually transitioned to using the proper struct request_queue, but there's lots left. So do a full sweet of the kernel and get rid of this typedef and replace its uses with the proper type. Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2007-07-16umem: Fix match of pci_ids in umem driverNeil Brown
the pci device list for umem was not using PCI_DEVICE, so the subvendor/subdevice fields were not set to ANY, so matching didn't work properly. Change to use PCI_DEVICE. Signed-off-by: Neil Brown <neilb@suse.de> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2007-07-16umem: Remove references to dead CONFIG_MM_MAP_MEMORY variableRobert P. J. Day
Signed-off-by: Robert P. J. Day <rpjday@mindspring.com> Acked-by: NeilBrown <neilb@suse.de> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2007-05-08header cleaning: don't include smp_lock.h when not usedRandy Dunlap
Remove includes of <linux/smp_lock.h> where it is not used/needed. Suggested by Al Viro. Builds cleanly on x86_64, i386, alpha, ia64, powerpc, sparc, sparc64, and arm (all 59 defconfigs). Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-03-01[PATCH] Fix failure paths in modules init in umem.cNeilBrown
If register_blkdev() or alloc-disk fail in mm_init() after pci_register_driver() succeeds, then mm_pci_driver is not unregistered properly: Cc: Philip Guo <pg@cs.stanford.edu> Signed-off-by: Neil Brown <neilb@suse.de> Cc: Jens Axboe <jens.axboe@oracle.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-02-14[PATCH] remove many unneeded #includes of sched.hTim Schmielau
After Al Viro (finally) succeeded in removing the sched.h #include in module.h recently, it makes sense again to remove other superfluous sched.h includes. There are quite a lot of files which include it but don't actually need anything defined in there. Presumably these includes were once needed for macros that used to live in sched.h, but moved to other header files in the course of cleaning it up. To ease the pain, this time I did not fiddle with any header files and only removed #includes from .c-files, which tend to cause less trouble. Compile tested against 2.6.20-rc2 and 2.6.20-rc2-mm2 (with offsets) on alpha, arm, i386, ia64, mips, powerpc, and x86_64 with allnoconfig, defconfig, allmodconfig, and allyesconfig as well as a few randconfigs on x86_64 and all configs in arch/arm/configs on arm. I also checked that no new warnings were introduced by the patch (actually, some warnings are removed that were emitted by unnecessarily included header files). Signed-off-by: Tim Schmielau <tim@physik3.uni-rostock.de> Acked-by: Russell King <rmk+kernel@arm.linux.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2006-10-05IRQ: Maintain regs pointer globally rather than passing to IRQ handlersDavid Howells
Maintain a per-CPU global "struct pt_regs *" variable which can be used instead of passing regs around manually through all ~1800 interrupt handlers in the Linux kernel. The regs pointer is used in few places, but it potentially costs both stack space and code to pass it around. On the FRV arch, removing the regs parameter from all the genirq function results in a 20% speed up of the IRQ exit path (ie: from leaving timer_interrupt() to leaving do_IRQ()). Where appropriate, an arch may override the generic storage facility and do something different with the variable. On FRV, for instance, the address is maintained in GR28 at all times inside the kernel as part of general exception handling. Having looked over the code, it appears that the parameter may be handed down through up to twenty or so layers of functions. Consider a USB character device attached to a USB hub, attached to a USB controller that posts its interrupts through a cascaded auxiliary interrupt controller. A character device driver may want to pass regs to the sysrq handler through the input layer which adds another few layers of parameter passing. I've build this code with allyesconfig for x86_64 and i386. I've runtested the main part of the code on FRV and i386, though I can't test most of the drivers. I've also done partial conversion for powerpc and MIPS - these at least compile with minimal configurations. This will affect all archs. Mostly the changes should be relatively easy. Take do_IRQ(), store the regs pointer at the beginning, saving the old one: struct pt_regs *old_regs = set_irq_regs(regs); And put the old one back at the end: set_irq_regs(old_regs); Don't pass regs through to generic_handle_irq() or __do_IRQ(). In timer_interrupt(), this sort of change will be necessary: - update_process_times(user_mode(regs)); - profile_tick(CPU_PROFILING, regs); + update_process_times(user_mode(get_irq_regs())); + profile_tick(CPU_PROFILING); I'd like to move update_process_times()'s use of get_irq_regs() into itself, except that i386, alone of the archs, uses something other than user_mode(). Some notes on the interrupt handling in the drivers: (*) input_dev() is now gone entirely. The regs pointer is no longer stored in the input_dev struct. (*) finish_unlinks() in drivers/usb/host/ohci-q.c needs checking. It does something different depending on whether it's been supplied with a regs pointer or not. (*) Various IRQ handler function pointers have been moved to type irq_handler_t. Signed-Off-By: David Howells <dhowells@redhat.com> (cherry picked from 1b16e7ac850969f38b375e511e3fa2f474a33867 commit)
2006-10-03[PATCH] pr_debug: umem: repair nonexistant bh pr_debug referenceZach Brown
umem: repair nonexistant bh pr_debug reference Signed-off-by: Zach Brown <zach.brown@oracle.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-07-02[PATCH] irq-flags: drivers/block Use the new IRQF_ constantsThomas Gleixner
Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@elte.hu> Cc: "David S. Miller" <davem@davemloft.net> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Jens Axboe <axboe@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-06-30Remove obsolete #include <linux/config.h>Jörn Engel
Signed-off-by: Jörn Engel <joern@wohnheim.fh-wedel.de> Signed-off-by: Adrian Bunk <bunk@stusta.de>
2006-06-26[PATCH] devfs: Remove the gendisk devfs_name field as it's no longer neededGreg Kroah-Hartman
And remove the now unneeded number field. Also fixes all drivers that set these fields. Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-03-28[PATCH] Replace 0xff.. with correct DMA_xBIT_MASKMatthias Gehre
Replace all occurences of 0xff.. in calls to function pci_set_dma_mask() and pci_set_consistant_dma_mask() with the corresponding DMA_xBIT_MASK from linux/dma-mapping.h. Signed-off-by: Matthias Gehre <M.Gehre@gmx.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-03-18[PATCH] regularize blk_cleanup_queue() useAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2006-02-03[PATCH] umem: check pci_set_dma_mask return value correctlyTobias Klauser
Signed-off-by: Tobias Klauser <tklauser@nuerscht.ch> Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-01-09[PATCH] drivers/block: Replace pci_module_init() with pci_register_driver()Richard Knutsson
Replace obsolete pci_module_init() with pci_register_driver(). Signed-off-by: Richard Knutsson <ricknu-0@student.ltu.se> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-01-09[PATCH] Add block_device_operations.getgeo block device methodChristoph Hellwig
HDIO_GETGEO is implemented in most block drivers, and all of them have to duplicate the code to copy the structure to userspace, as well as getting the start sector. This patch moves that to common code [1] and adds a ->getgeo method to fill out the raw kernel hd_geometry structure. For many drivers this means ->ioctl can go away now. [1] the s390 block drivers are odd in this respect. xpram sets ->start to 4 always which seems more than odd, and the dasd driver shifts the start offset around, probably because of it's non-standard sector size. Signed-off-by: Christoph Hellwig <hch@lst.de> Cc: Jens Axboe <axboe@suse.de> Cc: <mike.miller@hp.com> Cc: Jeff Dike <jdike@addtoit.com> Cc: Paolo Giarrusso <blaisorblade@yahoo.it> Cc: Bartlomiej Zolnierkiewicz <B.Zolnierkiewicz@elka.pw.edu.pl> Cc: Neil Brown <neilb@cse.unsw.edu.au> Cc: Markus Lidel <Markus.Lidel@shadowconnect.com> Cc: Russell King <rmk@arm.linux.org.uk> Cc: David Woodhouse <dwmw2@infradead.org> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: James Bottomley <James.Bottomley@steeleye.com> Signed-off-by: Adrian Bunk <bunk@stusta.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-09-10[PATCH] janitor: block/umem: replace PRINTK with pr_debugDomen Puncer
Removed unused dprintk, replaced PRINTK with pr_debug. Signed-off-by: Maximilian Attems <janitor@sternwelten.at> Signed-off-by: Domen Puncer <domen@coderock.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-04-16Linux-2.6.12-rc2Linus Torvalds
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
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