aboutsummaryrefslogtreecommitdiffstats
path: root/include
Commit message (Collapse)AuthorAge
* Merge branch 'for-linus' of ↵Linus Torvalds2009-01-06
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/fuse * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/fuse: fuse: clean up annotations of fc->lock fuse: fix sparse warning in ioctl fuse: update interface version fuse: add fuse_conn->release() fuse: separate out fuse_conn_init() from new_conn() fuse: add fuse_ prefix to several functions fuse: implement poll support fuse: implement unsolicited notification fuse: add file kernel handle fuse: implement ioctl support fuse: don't let fuse_req->end() put the base reference fuse: move FUSE_MINOR to miscdevice.h fuse: style fixes
| * fuse: update interface versionMiklos Szeredi2008-12-01
| | | | | | | | | | | | | | | | | | | | | | | | | | Change interface version to 7.11 after adding the IOCTL and POLL messages. Also clean up the <linux/fuse.h> header a bit: - update copyright date to 2008 - fix checkpatch warning: WARNING: Use #include <linux/types.h> instead of <asm/types.h> - remove FUSE_MAJOR define, which is not being used any more Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
| * fuse: implement poll supportTejun Heo2008-11-26
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Implement poll support. Polled files are indexed using kh in a RB tree rooted at fuse_conn->polled_files. Client should send FUSE_NOTIFY_POLL notification once after processing FUSE_POLL which has FUSE_POLL_SCHEDULE_NOTIFY set. Sending notification unconditionally after the latest poll or everytime file content might have changed is inefficient but won't cause malfunction. fuse_file_poll() can sleep and requires patches from the following thread which allows f_op->poll() to sleep. http://thread.gmane.org/gmane.linux.kernel/726176 Signed-off-by: Tejun Heo <tj@kernel.org> Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
| * fuse: implement unsolicited notificationTejun Heo2008-11-26
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Clients always used to write only in response to read requests. To implement poll efficiently, clients should be able to issue unsolicited notifications. This patch implements basic notification support. Zero fuse_out_header.unique is now accepted and considered unsolicited notification and the error field contains notification code. This patch doesn't implement any actual notification. Signed-off-by: Tejun Heo <tj@kernel.org> Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
| * fuse: implement ioctl supportTejun Heo2008-11-26
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Generic ioctl support is tricky to implement because only the ioctl implementation itself knows which memory regions need to be read and/or written. To support this, fuse client can request retry of ioctl specifying memory regions to read and write. Deep copying (nested pointers) can be implemented by retrying multiple times resolving one depth of dereference at a time. For security and cleanliness considerations, ioctl implementation has restricted mode where the kernel determines data transfer directions and sizes using the _IOC_*() macros on the ioctl command. In this mode, retry is not allowed. For all FUSE servers, restricted mode is enforced. Unrestricted ioctl will be used by CUSE. Plese read the comment on top of fs/fuse/file.c::fuse_file_do_ioctl() for more information. Signed-off-by: Tejun Heo <tj@kernel.org> Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
| * fuse: move FUSE_MINOR to miscdevice.hTejun Heo2008-11-26
| | | | | | | | | | | | | | Move FUSE_MINOR to miscdevice.h. While at it, de-uglify the file. Signed-off-by: Tejun Heo <tj@kernel.org> Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
* | Merge git://git.kernel.org/pub/scm/linux/kernel/git/bart/ide-2.6Linus Torvalds2009-01-06
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * git://git.kernel.org/pub/scm/linux/kernel/git/bart/ide-2.6: (41 commits) scc_pata: make use of scc_dma_sff_read_status() ide-dma-sff: factor out ide_dma_sff_write_status() ide: move read_sff_dma_status() method to 'struct ide_dma_ops' ide: don't set hwif->dma_ops in init_dma() method Resurrect IT8172 IDE controller driver piix: sync ich_laptop[] with ata_piix.c ide: update warm-plug HOWTO ide: fix ide_port_scan() to do ACPI setup after initializing request queues ide: remove now redundant ->cur_dev checks ide: remove unused ide_hwif_t.sg_mapped field ide: struct ide_atapi_pc - remove unused fields and update documentation ide: remove superfluous hwif variable assignment from ide_timer_expiry() ide: use ide_pci_is_in_compatibility_mode() helper in setup-pci.c ide: make "paranoia" ->handler check in ide_intr() more strict ide-cd: convert to ide-atapi facilities ide-cd: start DMA before sending the actual packet command ide-cd: wait for DRQ to get set per default ide: Fix drive's DWORD-IO handling ide: add port and host iterators ide: dynamic allocation of device structures ...
| * | ide: move read_sff_dma_status() method to 'struct ide_dma_ops'Sergei Shtylyov2009-01-06
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Move apparently misplaced read_sff_dma_status() method from 'struct ide_tp_ops' to 'struct ide_dma_ops', renaming it to dma_sff_read_status() and making only required for SFF-8038i compatible IDE controller drivers (greatly cutting down the number of initializers) as its only user (outside ide-dma-sff.c and such drivers) appears to be ide_pci_check_simplex() which is only called for such controllers... Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
| * | Resurrect IT8172 IDE controller driverShane McDonald2009-01-06
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Support for the IT8172 IDE controller was removed from the kernel sometime after 2.6.18. Support for the only boards that used the IT8172 was removed from the kernel after 2.6.18, as they had never compiled since 2.6.0. However, there are a couple of platforms that use this chip: the PMC-Sierra Xiao Hu thin-client computer, which is no longer in production, and the Linksys NSS4000 Network Attached Storage box, which is based on the Xiao Hu board. I am attempting to add support for the Xiao Hu to the kernel, and this IT8172 IDE controller is the first bit of code in this effort. This patch resurrects the IT8172 IDE controller code. I began with the 2.6.18 version of the it8172.c file, and have moved it forward so that it works with the latest version of the kernel. I have run this driver on a PMC-Sierra Xiao Hu board with the 2.6.28 kernel, and I have had no problems with it in my configuration. The attached patch applies cleanly against 2.6.28. Signed-off-by: Shane McDonald <mcdonald.shane@gmail.com> Acked-by: Sergei Shtylyov <sshtylyov@ru.mvista.com> Cc: alan@lxorguk.ukuu.org.uk [bart: s/HWIF(drive)/drive->hwif/] Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
| * | ide: remove unused ide_hwif_t.sg_mapped fieldBartlomiej Zolnierkiewicz2009-01-06
| | | | | | | | | | | | Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
| * | ide: struct ide_atapi_pc - remove unused fields and update documentationBartlomiej Zolnierkiewicz2009-01-06
| | | | | | | | | | | | Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
| * | ide-cd: convert to ide-atapi facilitiesBorislav Petkov2009-01-06
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | ... and remove no longer needed cdrom_start_packet_command and cdrom_transfer_packet_command. Tested lightly with ide-cd and ide-floppy. Signed-off-by: Borislav Petkov <petkovbb@gmail.com> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
| * | ide: add port and host iteratorsBartlomiej Zolnierkiewicz2009-01-06
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add ide_port_for_each_dev() / ide_host_for_each_port() iterators and update IDE code to use them. While at it: - s/unit/i/ variable in ide_port_wait_ready(), ide_probe_port(), ide_port_tune_devices(), ide_port_init_devices_data(), do_reset1(), ide_acpi_set_state() and scc_dma_end() - s/d/i/ variable in ide_proc_port_register_devices() There should be no functional changes caused by this patch. Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
| * | ide: dynamic allocation of device structuresBartlomiej Zolnierkiewicz2009-01-06
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Allocate device structures dynamically instead of having them embedded in ide_hwif_t: * Remove needless zeroing of port structure from ide_init_port_data(). * Add ide_hwif_t.devices[MAX_DRIVES] (table of pointers to the devices). * Add ide_port_{alloc,free}_devices() helpers and use them respectively in ide_{host,free}_alloc(). * Convert all users of ->drives[] to use ->devices[] instead. While at it: * Use drive->dn for the slave device check in scc_pata.c. As a nice side-effect this patch cuts ~1kB (x86-32) from the resulting code size: text data bss dec hex filename 53963 1244 237 55444 d894 drivers/ide/ide-core.o.before 52981 1244 237 54462 d4be drivers/ide/ide-core.o.after Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
| * | ide: remove ->error method from struct ide_driverBartlomiej Zolnierkiewicz2009-01-06
| | | | | | | | | | | | | | | | | | | | | | | | * Remove (now superfluous) ->error method from struct ide_driver. * Unexport __ide_error() and make it static. Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
| * | ide: remove ide_driver_t typedefBartlomiej Zolnierkiewicz2009-01-06
| | | | | | | | | | | | | | | | | | | | | | | | While at it: - s/struct ide_driver_s/struct ide_driver/ - use to_ide_driver() macro in ide-proc.c Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
| * | ide: remove 'byte' typedefBartlomiej Zolnierkiewicz2009-01-06
| | | | | | | | | | | | | | | | | | | | | Just use u8 instead, also s/__u8/u8/ in ide-cd.h while at it. Acked-by: Sergei Shtylyov <sshtylyov@ru.mvista.com> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
| * | ide: remove ide_pci_enablebit_t typedefBartlomiej Zolnierkiewicz2009-01-06
| | | | | | | | | | | | | | | | | | | | | Remove needless parens while at it. Acked-by: Sergei Shtylyov <sshtylyov@ru.mvista.com> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
| * | ide: remove local_irq_set() macroBartlomiej Zolnierkiewicz2009-01-06
| | | | | | | | | | | | Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
| * | ide: remove HWIF() macroBartlomiej Zolnierkiewicz2009-01-06
| | | | | | | | | | | | Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
| * | ide: move ide_init_port_data() and friends to ide-probe.cBartlomiej Zolnierkiewicz2009-01-06
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * Move IDE_DEFAULT_MAX_FAILURES to <linux/ide.h>. * Move ide_cfg_mtx, ide_hwif_to_major[], ide_port_init_devices_data(), ide_init_port_data(), ide_init_port_hw() and ide_unregister() to ide-probe.c from ide.c. * Make ide_unregister(), ide_init_port_data(), ide_init_port_hw() and ide_cfg_mtx static. While at it: * Remove stale ide_init_port_data() documentation and ide_lock extern. Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
| * | ide: merge ide_hwgroup_t with ide_hwif_t (v2)Bartlomiej Zolnierkiewicz2009-01-06
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * Merge ide_hwgroup_t with ide_hwif_t. * Cleanup init_irq() accordingly, then remove no longer needed ide_remove_port_from_hwgroup() and ide_ports[]. * Remove now unused HWGROUP() macro. While at it: * ide_dump_ata_error() fixups v2: * Fix ->quirk_list check in do_ide_request() (s/hwif->cur_dev/prev_port->cur_dev). Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
| * | ide: use lock bitops for ports serialization (v2)Bartlomiej Zolnierkiewicz2009-01-06
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * Add ->host_busy field to struct ide_host and use it's first bit together with lock bitops to provide new ports serialization method. * Convert core IDE code to use new ide_[un]lock_host() helpers. This removes the need for taking hwgroup->lock if host is already busy on serialized hosts and makes it possible to merge ide_hwgroup_t into ide_hwif_t (done in the later patch). * Remove no longer needed ide_hwgroup_t.busy and ide_[un]lock_hwgroup(). * Update do_ide_request() documentation. v2: * ide_release_lock() should be called inside IDE_HFLAG_SERIALIZE check. * Add ide_hwif_t.busy flag and ide_[un]lock_port() for serializing devices on a port. Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
| * | ide: remove hwgroup->hwif and {drive,hwif}->nextBartlomiej Zolnierkiewicz2009-01-06
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * Add 'int port_count' field to ide_hwgroup_t to keep the track of the number of ports in the hwgroup. Then update init_irq() and ide_remove_port_from_hwgroup() to use it. * Remove no longer needed hwgroup->hwif, {drive,hwif}->next, ide_add_drive_to_hwgroup() and ide_remove_drive_from_hwgroup() (hwgroup->drive now only denotes the currently active device in the hwgroup). * Update locking documentation in <linux/ide.h>. While at it: * Rename ->drive field in ide_hwgroup_t to ->cur_dev. * Use __func__ in ide_timer_expiry(). Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
| * | ide: use per-port IRQ handlersBartlomiej Zolnierkiewicz2009-01-06
| | | | | | | | | | | | | | | | | | | | | | | | | | | Use hwif instead of hwgroup as {request,free}_irq()'s cookie, teach ide_intr() to return early for non-active serialized ports, modify unexpected_intr() accordingly and then use per-port IRQ handlers instead of per-hwgroup ones. Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
| * | ide: add ->cur_port to struct ide_host and use it for serialized hostsBartlomiej Zolnierkiewicz2009-01-06
| | | | | | | | | | | | | | | | | | | | | | | | | | | * Pass 'ide_hwif_t *' instead of 'ide_hwgroup_t *' to unexpected_intr(). * Cache pointer to the port currently being serviced in ->cur_port and use it instead of hwif->hwgroup on serialized hosts. Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
* | | fs/exec.c: make do_coredump() voidWANG Cong2009-01-06
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | No one cares do_coredump()'s return value, and also it seems that it is also not necessary. So make it void. [akpm@linux-foundation.org: coding-style fixes] Signed-off-by: WANG Cong <wangcong@zeuux.org> Cc: Alexander Viro <viro@zeniv.linux.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | | rapidio: remove excess kernel-doc notationRandy Dunlap2009-01-06
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Remove excess kernel-doc notation from rio header and driver: Warning(include/linux/rio_drv.h:399): Excess function parameter or struct member 'buffer' description in 'rio_get_inb_message' Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com> Cc: Matt Porter <mporter@kernel.crashing.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | | twl4030-gpio: cleanup debounceDavid Brownell2009-01-06
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Provide a static debounce configuration mechanism for twl4030 GPIOs, replacing the previous dynamic one. The single user of that mechanism was for MMC card detect debouncing. Boards can provide a bitmask saying which GPIOs to debounce (30 msec). It's always enabled for pins with the MMC card-detect/VMMCx link active, so most boards won't need to set the debounce mask. This is a net code shrink, including runtime footprint. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Tony Lindgren <tony@atomide.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | | autofs4: make autofs type usage explicitIan Kent2009-01-06
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | - the type assigned at mount when no type is given is changed from 0 to AUTOFS_TYPE_INDIRECT. This was done because 0 and AUTOFS_TYPE_INDIRECT were being treated implicitly as the same type. - previously, an offset mount had it's type set to AUTOFS_TYPE_DIRECT|AUTOFS_TYPE_OFFSET but the mount control re-implementation needs to be able distinguish all three types. So this was changed to make the type setting explicit. - a type AUTOFS_TYPE_ANY was added for use by the re-implementation when checking if a given path is a mountpoint. It's not really a type as we use this to ask if a given path is a mountpoint in the autofs_dev_ioctl_ismountpoint() function. - functions to set and test the autofs mount types have been added to improve readability and make the type usage explicit. - the mount type is used from user space for the mount control re-implementtion so, for consistency, all the definitions have been moved to the user space include file include/linux/auto_fs4.h. Signed-off-by: Ian Kent <raven@themaw.net> Signed-off-by: Jeff Moyer <jmoyer@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | | autofs4: improve parameter usageIan Kent2009-01-06
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The parameter usage in the device node ioctl code uses arg1 and arg2 as parameter names. This patch redefines the parameter names to reflect what they actually are in an effort to make the code more readable. Signed-off-by: Ian Kent <raven@themaw.net> Signed-off-by: Jeff Moyer <jmoyer@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | | kprobes: support probing module __exit functionMasami Hiramatsu2009-01-06
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Allows kprobes to probe __exit routine. This adds flags member to struct kprobe. When module is freed(kprobes hooks module_notifier to get this event), kprobes which probe the functions in that module are set to "Gone" flag to the flags member. These "Gone" probes are never be enabled. Users can check the GONE flag through debugfs. This also removes mod_refcounted, because we couldn't free a module if kprobe incremented the refcount of that module. [akpm@linux-foundation.org: document some locking] [mhiramat@redhat.com: bugfix: pass aggr_kprobe to arch_remove_kprobe] [mhiramat@redhat.com: bugfix: release old_p's insn_slot before error return] Signed-off-by: Masami Hiramatsu <mhiramat@redhat.com> Acked-by: Ananth N Mavinakayanahalli <ananth@in.ibm.com> Cc: Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com> Signed-off-by: Masami Hiramatsu <mhiramat@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | | kprobes: add kprobe_insn_mutex and cleanup arch_remove_kprobe()Masami Hiramatsu2009-01-06
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add kprobe_insn_mutex for protecting kprobe_insn_pages hlist, and remove kprobe_mutex from architecture dependent code. This allows us to call arch_remove_kprobe() (and free_insn_slot) while holding kprobe_mutex. Signed-off-by: Masami Hiramatsu <mhiramat@redhat.com> Acked-by: Ananth N Mavinakayanahalli <ananth@in.ibm.com> Cc: Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com> Cc: Russell King <rmk@arm.linux.org.uk> Cc: "Luck, Tony" <tony.luck@intel.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | | module: add within_module_core() and within_module_init()Masami Hiramatsu2009-01-06
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This series of patches allows kprobes to probe module's __init and __exit functions. This means, you can probe driver initialization and terminating. Currently, kprobes can't probe __init function because these functions are freed after module initialization. And it also can't probe module __exit functions because kprobe increments reference count of target module and user can't unload it. this means __exit functions never be called unless removing probes from the module. To solve both cases, this series of patches introduces GONE flag and sets it when the target code is freed(for this purpose, kprobes hooks MODULE_STATE_* events). This also removes refcount incrementing for allowing user to unload target module. Users can check which probes are GONE by debugfs interface. For taking timing of freeing module's .init text, these also include a patch which adds module's notifier of MODULE_STATE_LIVE event. This patch: Add within_module_core() and within_module_init() for checking whether an address is in the module .init.text section or .text section, and replace within() local inline functions in kernel/module.c with them. kprobes uses these functions to check where the kprobe is inserted. Signed-off-by: Masami Hiramatsu <mhiramat@redhat.com> Cc: Ananth N Mavinakayanahalli <ananth@in.ibm.com> Cc: Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com> Acked-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | | spi_gpio driverDavid Brownell2009-01-06
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Generalize the old at91rm9200 "bootstrap" bitbanging SPI master driver as "spi_gpio", so it works with arbitrary GPIOs and can be configured through platform_data. Such SPI masters support: - any number of bus instances (bus_num is the platform_device.id) - any number of chipselects (one GPIO per spi_device) - all four SPI_MODE values, and SPI_CS_HIGH - i/o word sizes from 1 to 32 bits; - devices configured as with any other spi_master controller When configured using platform_data, this provides relatively low clock rates. On platforms that support inlined GPIO calls, significantly improved transfer speeds are also possible with a semi-custom driver. (It's still painful when accessing flash memory, but less so.) Sanity checked by using this version to replace both native controllers on a board with six different SPI slaves, relying on three different SPI_MODE_* values and both SPI_CS_HIGH settings for correct operation. [akpm@linux-foundation.org: cleanups] Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Acked-by: Magnus Damm <damm@igel.co.jp> Tested-by: Magnus Damm <damm@igel.co.jp> Cc: Torgil Svensson <torgil.svensson@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | | binfmts.h: include list.hHiroshi Shimamoto2009-01-06
| | | | | | | | | | | | | | | | | | | | | | | | | | | linux_binfmt uses list_head, so list.h is needed. [akpm@linux-foundation.org: fix `make headerscheck'] Signed-off-by: Hiroshi Shimamoto <h-shimamoto@ct.jp.nec.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | | include/linux/interrupt.h: do not include linux/irqnr.h twiceJesper Juhl2009-01-06
| | | | | | | | | | | | | | | | | | Signed-off-by: Jesper Juhl <jj@chaosbits.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | | remove linux/hardirq.h from asm-generic/local.hRussell King2009-01-06
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | While looking at reducing the amount of architecture namespace pollution in the generic kernel, I found that asm/irq.h is included in the vast majority of compilations on ARM (around 650 files.) Since asm/irq.h includes a sub-architecture include file on ARM, this causes a negative impact on the ccache's ability to re-use the build results from other sub-architectures, so we have a desire to reduce the dependencies on asm/irq.h. It turns out that a major cause of this is the needless include of linux/hardirq.h into asm-generic/local.h. The patch below removes this include, resulting in some 250 to 300 files (around half) of the kernel then omitting asm/irq.h. My test builds still succeed, provided two ARM files are fixed (arch/arm/kernel/traps.c and arch/arm/mm/fault.c) - so there may be negative impacts for this on other architectures. Note that x86 does not include asm/irq.h nor linux/hardirq.h in its asm/local.h, so this patch can be viewed as bringing the generic version into line with the x86 version. [kosaki.motohiro@jp.fujitsu.com: add #include <linux/irqflags.h> to acpi/processor_idle.c] [adobriyan@gmail.com: fix sparc64] Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | | percpu_counter: FBC_BATCH should be a variableEric Dumazet2009-01-06
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | For NR_CPUS >= 16 values, FBC_BATCH is 2*NR_CPUS Considering more and more distros are using high NR_CPUS values, it makes sense to use a more sensible value for FBC_BATCH, and get rid of NR_CPUS. A sensible value is 2*num_online_cpus(), with a minimum value of 32 (This minimum value helps branch prediction in __percpu_counter_add()) We already have a hotcpu notifier, so we can adjust FBC_BATCH dynamically. We rename FBC_BATCH to percpu_counter_batch since its not a constant anymore. Signed-off-by: Eric Dumazet <dada1@cosmosbay.com> Acked-by: David S. Miller <davem@davemloft.net> Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | | documentation: when to BUG(), and when to not BUG()David Brownell2009-01-06
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Provide some basic advice about when to use BUG()/BUG_ON(): never, unless there's really no better option. This matches my understanding of the standard policy ... which seems not to be written down so far, outside of LKML messages that I haven't bookmarked. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Cc: Hans Verkuil <hverkuil@xs4all.nl> Cc: Ingo Molnar <mingo@elte.hu> Cc: Arjan van de Ven <arjan@infradead.org> Cc: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | | poll: allow f_op->poll to sleepTejun Heo2009-01-06
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | f_op->poll is the only vfs operation which is not allowed to sleep. It's because poll and select implementation used task state to synchronize against wake ups, which doesn't have to be the case anymore as wait/wake interface can now use custom wake up functions. The non-sleep restriction can be a bit tricky because ->poll is not called from an atomic context and the result of accidentally sleeping in ->poll only shows up as temporary busy looping when the timing is right or rather wrong. This patch converts poll/select to use custom wake up function and use separate triggered variable to synchronize against wake up events. The only added overhead is an extra function call during wake up and negligible. This patch removes the one non-sleep exception from vfs locking rules and is beneficial to userland filesystem implementations like FUSE, 9p or peculiar fs like spufs as it's very difficult for those to implement non-sleeping poll method. While at it, make the following cosmetic changes to make poll.h and select.c checkpatch friendly. * s/type * symbol/type *symbol/ : three places in poll.h * remove blank line before EXPORT_SYMBOL() : two places in select.c Oleg: spotted missing barrier in poll_schedule_timeout() Davide: spotted missing write barrier in pollwake() Signed-off-by: Tejun Heo <tj@kernel.org> Cc: Eric Van Hensbergen <ericvh@gmail.com> Cc: Ron Minnich <rminnich@sandia.gov> Cc: Ingo Molnar <mingo@elte.hu> Cc: Christoph Hellwig <hch@infradead.org> Signed-off-by: Miklos Szeredi <mszeredi@suse.cz> Cc: Davide Libenzi <davidel@xmailserver.org> Cc: Brad Boyer <flar@allandria.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Roland McGrath <roland@redhat.com> Cc: Mauro Carvalho Chehab <mchehab@infradead.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Cc: Davide Libenzi <davidel@xmailserver.org> Cc: Oleg Nesterov <oleg@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | | Create a DIV_ROUND_CLOSEST macro to do division with roundingDarrick J. Wong2009-01-06
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Create a helper macro to divide two numbers and round the result to the nearest whole number. This is a helper macro for hwmon drivers that want to convert incoming sysfs values per standard hwmon practice, though the macro itself can be used by anyone. Signed-off-by: Darrick J. Wong <djwong@us.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | | Remove remaining unwinder codeAlexey Dobriyan2009-01-06
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Cc: Gabor Gombas <gombasg@sztaki.hu> Cc: Jan Beulich <jbeulich@novell.com> Cc: Andi Kleen <andi@firstfloor.org> Cc: Ingo Molnar <mingo@elte.hu>, Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | | atomic_t: unify all arch definitionsMatthew Wilcox2009-01-06
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The atomic_t type cannot currently be used in some header files because it would create an include loop with asm/atomic.h. Move the type definition to linux/types.h to break the loop. Signed-off-by: Matthew Wilcox <willy@linux.intel.com> Cc: Huang Ying <ying.huang@intel.com> Cc: <linux-arch@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | | mm: remove CONFIG_OUT_OF_LINE_PFN_TO_PAGEKOSAKI Motohiro2009-01-06
| | | | | | | | | | | | | | | | | | | | | | | | | | | No architectures use CONFIG_OUT_OF_LINE_PFN_TO_PAGE - it can be removed. Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | | mm: introduce get_mm_hiwater_xxx(), fix taskstats->hiwater_xxx accountingOleg Nesterov2009-01-06
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | xacct_add_tsk() relies on do_exit()->update_hiwater_xxx() and uses mm->hiwater_xxx directly, this leads to 2 problems: - taskstats_user_cmd() can call fill_pid()->xacct_add_tsk() at any moment before the task exits, so we should check the current values of rss/vm anyway. - do_exit()->update_hiwater_xxx() calls are racy. An exiting thread can be preempted right before mm->hiwater_xxx = new_val, and another thread can use A_LOT of memory and exit in between. When the first thread resumes it can be the last thread in the thread group, in that case we report the wrong hiwater_xxx values which do not take A_LOT into account. Introduce get_mm_hiwater_rss() and get_mm_hiwater_vm() helpers and change xacct_add_tsk() to use them. The first helper will also be used by rusage->ru_maxrss accounting. Kill do_exit()->update_hiwater_xxx() calls. Unless we are going to decrease rss/vm there is no point to update mm->hiwater_xxx, and nobody can look at this mm_struct when exit_mmap() actually unmaps the memory. Signed-off-by: Oleg Nesterov <oleg@redhat.com> Acked-by: Hugh Dickins <hugh@veritas.com> Reviewed-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Acked-by: Balbir Singh <balbir@linux.vnet.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | | fs: sys_sync fixNick Piggin2009-01-06
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | s_syncing livelock avoidance was breaking data integrity guarantee of sys_sync, by allowing sys_sync to skip writing or waiting for superblocks if there is a concurrent sys_sync happening. This livelock avoidance is much less important now that we don't have the get_super_to_sync() call after every sb that we sync. This was replaced by __put_super_and_need_restart. Signed-off-by: Nick Piggin <npiggin@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | | fs: remove WB_SYNC_HOLDNick Piggin2009-01-06
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Remove WB_SYNC_HOLD. The primary motiviation is the design of my anti-starvation code for fsync. It requires taking an inode lock over the sync operation, so we could run into lock ordering problems with multiple inodes. It is possible to take a single global lock to solve the ordering problem, but then that would prevent a future nice implementation of "sync multiple inodes" based on lock order via inode address. Seems like a backward step to remove this, but actually it is busted anyway: we can't use the inode lists for data integrity wait: an inode can be taken off the dirty lists but still be under writeback. In order to satisfy data integrity semantics, we should wait for it to finish writeback, but if we only search the dirty lists, we'll miss it. It would be possible to have a "writeback" list, for sys_sync, I suppose. But why complicate things by prematurely optimise? For unmounting, we could avoid the "livelock avoidance" code, which would be easier, but again premature IMO. Fixing the existing data integrity problem will come next. Signed-off-by: Nick Piggin <npiggin@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | | badpage: remove vma from page_remove_rmapHugh Dickins2009-01-06
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Remove page_remove_rmap()'s vma arg, which was only for the Eeek message. And remove the BUG_ON(page_mapcount(page) == 0) from CONFIG_DEBUG_VM's page_dup_rmap(): we're trying to be more resilient about that than BUGs. Signed-off-by: Hugh Dickins <hugh@veritas.com> Cc: Nick Piggin <nickpiggin@yahoo.com.au> Cc: Christoph Lameter <cl@linux-foundation.org> Cc: Mel Gorman <mel@csn.ul.ie> Cc: Rik van Riel <riel@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | | badpage: zap print_bad_pte on swap and fileHugh Dickins2009-01-06
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Complete zap_pte_range()'s coverage of bad pagetable entries by calling print_bad_pte() on a pte_file in a linear vma and on a bad swap entry. That needs free_swap_and_cache() to tell it, which will also have shown one of those "swap_free" errors (but with much less information). Similar checks in fork's copy_one_pte()? No, that would be more noisy than helpful: we'll see them when parent and child exec or exit. Where do_nonlinear_fault() calls print_bad_pte(): omit !VM_CAN_NONLINEAR case, that could only be a bug in sys_remap_file_pages(), not a bad pte. VM_FAULT_OOM rather than VM_FAULT_SIGBUS? Well, okay, that is consistent with what happens if do_swap_page() operates a bad swap entry; but don't we have patches to be more careful about killing when VM_FAULT_OOM? Signed-off-by: Hugh Dickins <hugh@veritas.com> Cc: Nick Piggin <nickpiggin@yahoo.com.au> Cc: Christoph Lameter <cl@linux-foundation.org> Cc: Mel Gorman <mel@csn.ul.ie> Cc: Rik van Riel <riel@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
generated by cgit v1.2.2 (git 2.25.0) at 2025-03-12 12:54:59 -0400