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2011-08-04cris: add missing declaration of kgdb_init() and breakpoint()WANG Cong1-0/+3
Fix: arch/cris/arch-v10/kernel/irq.c:239: error: implicit declaration of function 'kgdb_init' arch/cris/arch-v10/kernel/irq.c:240: error: implicit declaration of function 'breakpoint' Declare these two functions. Reported-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: WANG Cong <xiyou.wangcong@gmail.com> Cc: Mikael Starvik <starvik@axis.com> Cc: Jesper Nilsson <jesper.nilsson@axis.com> Cc: <stable@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-08-04cris: fix the prototype of sync_serial_ioctl()WANG Cong1-1/+1
Fix: arch/cris/arch-v10/drivers/sync_serial.c:961: error: conflicting types for 'sync_serial_ioctl' Reported-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: WANG Cong <xiyou.wangcong@gmail.com> Cc: Mikael Starvik <starvik@axis.com> Cc: Jesper Nilsson <jesper.nilsson@axis.com> Cc: <stable@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-08-04cris: fix a build error in sync_serial_open()WANG Cong1-2/+2
Fix: arch/cris/arch-v10/drivers/sync_serial.c:628: error: 'ret' undeclared (first use in this function) 'ret' should be 'err'. Reported-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: WANG Cong <xiyou.wangcong@gmail.com> Cc: Mikael Starvik <starvik@axis.com> Cc: Jesper Nilsson <jesper.nilsson@axis.com> Cc: <stable@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-08-04cris: fix a build error in kernel/fork.cWANG Cong1-3/+3
Fix this error: kernel/fork.c:267: error: implicit declaration of function 'alloc_thread_info_node' This is due to renaming alloc_thread_info() to alloc_thread_info_node(). [akpm@linux-foundation.org: coding-style fixes] Reported-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: WANG Cong <xiyou.wangcong@gmail.com> Cc: Mikael Starvik <starvik@axis.com> Cc: Jesper Nilsson <jesper.nilsson@axis.com> Cc: <stable@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-08-04tpm_tis: fix build when ACPI is not enabledRandy Dunlap1-1/+6
Fix tpm_tis.c build when CONFIG_ACPI is not enabled by providing a stub function. Fixes many build errors/warnings: drivers/char/tpm/tpm_tis.c:89: error: dereferencing pointer to incomplete type drivers/char/tpm/tpm_tis.c:89: warning: type defaults to 'int' in declaration of 'type name' drivers/char/tpm/tpm_tis.c:89: error: request for member 'list' in something not a structure or union ... Signed-off-by: Randy Dunlap <rdunlap@xenotime.net> Cc: Leendert van Doorn <leendert@watson.ibm.com> Cc: James Morris <jmorris@namei.org> Cc: Ingo Molnar <mingo@elte.hu> Cc: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-08-04mm: page_alloc: increase __GFP_BITS_SHIFT to include __GFP_OTHER_NODEJohannes Weiner1-1/+1
__GFP_OTHER_NODE is used for NUMA allocations on behalf of other nodes. It's supposed to be passed through from the page allocator to zone_statistics(), but it never gets there as gfp_allowed_mask is not wide enough and masks out the flag early in the allocation path. The result is an accounting glitch where successful NUMA allocations by-agent are not properly attributed as local. Increase __GFP_BITS_SHIFT so that it includes __GFP_OTHER_NODE. Signed-off-by: Johannes Weiner <hannes@cmpxchg.org> Acked-by: Andi Kleen <ak@linux.intel.com> Reviewed-by: Minchan Kim <minchan.kim@gmail.com> Acked-by: Mel Gorman <mgorman@suse.de> Reviewed-by: Michal Hocko <mhocko@suse.cz> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-08-04ramoops: update module parametersSergiu Iordache1-0/+8
Update the module parameters when platform data is used. This means that they can be read from /sys/module/ramoops/parameters in order to parse the memory area. Signed-off-by: Sergiu Iordache <sergiu@chromium.org> Cc: Marco Stornelli <marco.stornelli@gmail.com> Cc: Seiji Aguchi <seiji.aguchi@hds.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-08-04Documentation: add pointer to name_to_dev_t for root= valuesWill Drewry3-3/+25
Update kernel-parameters.txt to point users to the authoritative comment for name_to_dev_t. In addition, updates other places where some name_to_dev_t behavior was discussed. All other references to root= appear to be for explicit sample usage or just side comments when discussing other kernel parameters. Signed-off-by: Will Drewry <wad@chromium.org> Cc: Kay Sievers <kay.sievers@vrfy.org> Cc: Randy Dunlap <rdunlap@xenotime.net> Cc: Namhyung Kim <namhyung@gmail.com> Cc: Trond Myklebust <Trond.Myklebust@netapp.com> Cc: Jens Axboe <axboe@kernel.dk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-08-04fs/dcache.c: fix new kernel-doc warningRandy Dunlap1-0/+1
Fix new kernel-doc warning in fs/dcache.c: Warning(fs/dcache.c:797): No description found for parameter 'sb' Signed-off-by: Randy Dunlap <rdunlap@xenotime.net> Cc: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-08-04ida: simplified functions for id allocationRusty Russell2-0/+71
The current hyper-optimized functions are overkill if you simply want to allocate an id for a device. Create versions which use an internal lock. In followup patches, numerous drivers are converted to use this interface. Thanks to Tejun for feedback. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Acked-by: Tejun Heo <tj@kernel.org> Acked-by: Jonathan Cameron <jic23@cam.ac.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-08-04taskstats: add_del_listener() should ignore !valid listenersOleg Nesterov1-1/+1
When send_cpu_listeners() finds the orphaned listener it marks it as !valid and drops listeners->sem. Before it takes this sem for writing, s->pid can be reused and add_del_listener() can wrongly try to re-use this entry. Change add_del_listener() to check ->valid = T. Signed-off-by: Oleg Nesterov <oleg@redhat.com> Reviewed-by: Vasiliy Kulikov <segoon@openwall.com> Acked-by: Balbir Singh <bsingharora@gmail.com> Cc: Jerome Marchand <jmarchan@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-08-04taskstats: add_del_listener() shouldn't use the wrong nodeOleg Nesterov1-9/+7
1. Commit 26c4caea9d69 "don't allow duplicate entries in listener mode" changed add_del_listener(REGISTER) so that "next_cpu:" can reuse the listener allocated for the previous cpu, this doesn't look exactly right even if minor. Change the code to kfree() in the already-registered case, this case is unlikely anyway so the extra kmalloc_node() shouldn't hurt but looke more correct and clean. 2. use the plain list_for_each_entry() instead of _safe() to scan listeners->list. 3. Remove the unneeded INIT_LIST_HEAD(&s->list), we are going to list_add(&s->list). Signed-off-by: Oleg Nesterov <oleg@redhat.com> Reviewed-by: Vasiliy Kulikov <segoon@openwall.com> Cc: Balbir Singh <bsingharora@gmail.com> Reviewed-by: Jerome Marchand <jmarchan@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-08-04rtc-omap: fix initialization of control registerDaniel Glöckner1-1/+1
As the comment explains, the intention of the code is to clear the OMAP_RTC_CTRL_MODE_12_24 bit, but instead it only clears the OMAP_RTC_CTRL_SPLIT and OMAP_RTC_CTRL_AUTO_COMP bits, which should be kept. OMAP_RTC_CTRL_DISABLE, OMAP_RTC_CTRL_SET_32_COUNTER, OMAP_RTC_CTRL_TEST, and OMAP_RTC_CTRL_ROUND_30S are also better off being cleared. Signed-off-by: Daniel Glöckner <dg@emlix.com> Cc: Alessandro Zummo <a.zummo@towertech.it> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-08-04fault-injection: add ability to export fault_attr in arbitrary directoryAkinobu Mita7-46/+33
init_fault_attr_dentries() is used to export fault_attr via debugfs. But it can only export it in debugfs root directory. Per Forlin is working on mmc_fail_request which adds support to inject data errors after a completed host transfer in MMC subsystem. The fault_attr for mmc_fail_request should be defined per mmc host and export it in debugfs directory per mmc host like /sys/kernel/debug/mmc0/mmc_fail_request. init_fault_attr_dentries() doesn't help for mmc_fail_request. So this introduces fault_create_debugfs_attr() which is able to create a directory in the arbitrary directory and replace init_fault_attr_dentries(). [akpm@linux-foundation.org: extraneous semicolon, per Randy] Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com> Tested-by: Per Forlin <per.forlin@linaro.org> Cc: Jens Axboe <axboe@kernel.dk> Cc: Christoph Lameter <cl@linux-foundation.org> Cc: Pekka Enberg <penberg@kernel.org> Cc: Matt Mackall <mpm@selenic.com> Cc: Randy Dunlap <rdunlap@xenotime.net> Cc: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-08-03Merge branch 'pstore-efi' of ↵Linus Torvalds1-3/+3
git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6 * 'pstore-efi' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6: efivars: fix warnings when CONFIG_PSTORE=n
2011-08-03Merge branch 'tools-release' of ↵Linus Torvalds2-26/+25
git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-idle-2.6 * 'tools-release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-idle-2.6: tools/power turbostat: fit output into 80 columns on snb-ep tools/power x86_energy_perf_policy: fix print of uninitialized string
2011-08-03Merge branch 'release' of ↵Linus Torvalds30-132/+352
git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6 * 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6: (28 commits) ACPI: delete stale reference in kernel-parameters.txt ACPI: add missing _OSI strings ACPI: remove NID_INVAL thermal: make THERMAL_HWMON implementation fully internal thermal: split hwmon lookup to a separate function thermal: hide CONFIG_THERMAL_HWMON ACPI print OSI(Linux) warning only once ACPI: DMI workaround for Asus A8N-SLI Premium and Asus A8N-SLI DELUX ACPI / Battery: propagate sysfs error in acpi_battery_add() ACPI / Battery: avoid acpi_battery_add() use-after-free ACPI: introduce "acpi_rsdp=" parameter for kdump ACPI: constify ops structs ACPI: fix CONFIG_X86_REROUTE_FOR_BROKEN_BOOT_IRQS ACPI: fix 80 char overflow ACPI / Battery: Resolve the race condition in the sysfs_remove_battery() ACPI / Battery: Add the check before refresh sysfs in the battery_notify() ACPI / Battery: Add the hibernation process in the battery_notify() ACPI / Battery: Rename acpi_battery_quirks2 with acpi_battery_quirks ACPI / Battery: Change 16-bit signed negative battery current into correct value ACPI / Battery: Add the power unit macro ...
2011-08-03Merge git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tileLinus Torvalds46-49/+576
* git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tile: arch/tile/mm/init.c: trivial: use BUG_ON arch/tile: remove useless set_fixmap_nocache() macro arch/tile: add hypervisor-based character driver for SPI flash ROM ioctl-number.txt: add the tile hardwall ioctl range tile: use generic-y format for one-line asm-generic headers clocksource: tile: convert to use clocksource_register_hz
2011-08-03Merge branch 'for-linus' of ↵Linus Torvalds19-528/+269
git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-unstable * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-unstable: (31 commits) Btrfs: don't call writepages from within write_full_page Btrfs: Remove unused variable 'last_index' in file.c Btrfs: clean up for find_first_extent_bit() Btrfs: clean up for wait_extent_bit() Btrfs: clean up for insert_state() Btrfs: remove unused members from struct extent_state Btrfs: clean up code for merging extent maps Btrfs: clean up code for extent_map lookup Btrfs: clean up search_extent_mapping() Btrfs: remove redundant code for dir item lookup Btrfs: make acl functions really no-op if acl is not enabled Btrfs: remove remaining ref-cache code Btrfs: remove a BUG_ON() in btrfs_commit_transaction() Btrfs: use wait_event() Btrfs: check the nodatasum flag when writing compressed files Btrfs: copy string correctly in INO_LOOKUP ioctl Btrfs: don't print the leaf if we had an error btrfs: make btrfs_set_root_node void Btrfs: fix oops while writing data to SSD partitions Btrfs: Protect the readonly flag of block group ... Fix up trivial conflicts (due to acl and writeback cleanups) in - fs/btrfs/acl.c - fs/btrfs/ctree.h - fs/btrfs/extent_io.c
2011-08-03Merge branch 'devicetree/next' of git://git.secretlab.ca/git/linux-2.6Linus Torvalds5-11/+16
* 'devicetree/next' of git://git.secretlab.ca/git/linux-2.6: MAINTAINERS: Add keyword match for of_match_table to device tree section of: constify property name parameters for helper functions input: xilinx_ps2: Add missing of_address.h header of: address: use resource_size helper
2011-08-03Merge branch 'spi/next' of git://git.secretlab.ca/git/linux-2.6Linus Torvalds1-8/+3
* 'spi/next' of git://git.secretlab.ca/git/linux-2.6: spi/pl022: remove function cannot exit
2011-08-03Merge git://git.kernel.org/pub/scm/linux/kernel/git/agk/linux-2.6-dmLinus Torvalds21-404/+1561
* git://git.kernel.org/pub/scm/linux/kernel/git/agk/linux-2.6-dm: (34 commits) dm table: set flush capability based on underlying devices dm crypt: optionally support discard requests dm raid: add md raid1 support dm raid: support metadata devices dm raid: add write_mostly parameter dm raid: add region_size parameter dm raid: improve table parameters documentation dm ioctl: forbid multiple device specifiers dm ioctl: introduce __get_dev_cell dm ioctl: fill in device parameters in more ioctls dm flakey: add corrupt_bio_byte feature dm flakey: add drop_writes dm flakey: support feature args dm flakey: use dm_target_offset and support discards dm table: share target argument parsing functions dm snapshot: skip reading origin when overwriting complete chunk dm: ignore merge_bvec for snapshots when safe dm table: clean dm_get_device and move exports dm raid: tidy includes dm ioctl: prevent empty message ...
2011-08-03Merge git://git.kernel.org/pub/scm/linux/kernel/git/wim/linux-watchdogLinus Torvalds3-4/+9
* git://git.kernel.org/pub/scm/linux/kernel/git/wim/linux-watchdog: watchdog: Cleanup WATCHDOG_CORE help text watchdog: Fix POST failure on ASUS P5N32-E SLI and similar boards watchdog: shwdt: fix usage of mod_timer
2011-08-03Merge branch 'for-linus' of ↵Linus Torvalds6-14/+128
git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-2.6 * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-2.6: ALSA: asihpi - Clarify adapter index validity check ALSA: asihpi - Don't leak firmware if mem alloc fails ALSA: rtctimer.c needs module.h ASoC: Fix txx9aclc.c build ALSA: hdspm - Add firmware revision 0xcc for RME MADI ALSA: hdspm - Fix reported external sample rate on RME MADI and MADIface ALSA: hdspm - Provide MADI speed mode selector on RME MADI and MADIface ALSA: sound/core/pcm_compat.c: adjust array index
2011-08-03tools/power turbostat: fit output into 80 columns on snb-epLen Brown1-23/+23
Reduce columns for package number to 1. If you can afford more than 9 packages, you can also afford a terminal with more than 80 columns:-) Also shave a column also off the package C-states Signed-off-by: Len Brown <len.brown@intel.com>
2011-08-03efivars: fix warnings when CONFIG_PSTORE=nTony Luck1-3/+3
drivers/firmware/efivars.c:161: warning: ‘utf16_strlen’ defined but not used utf16_strlen() is only used inside CONFIG_PSTORE - make this "static inline" to shut the compiler up [thanks to hpa for the suggestion]. drivers/firmware/efivars.c:602: warning: initialization from incompatible pointer type Between v1 and v2 of this patch series we decided to make the "part" number unsigned - but missed fixing the stub version of efi_pstore_write() Acked-by: Matthew Garrett <mjg@redhat.com> Acked-by: Mike Waychison <mikew@google.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
2011-08-03Merge branches 'acpica', 'battery', 'boot-irqs', 'bz-24492', 'bz-9528', ↵Len Brown157-744/+1471
'from-akpm', 'kexec-param' and 'misc' into release Conflicts: Documentation/kernel-parameters.txt Signed-off-by: Len Brown <len.brown@intel.com>
2011-08-03ACPI: delete stale reference in kernel-parameters.txtLen Brown1-2/+0
Says for acpi= See also Documentation/power/pm.txt, pci=noacpi but this file does not exist Reported-by: Alan Cox <alan@lxorguk.ukuu.org.uk> Signed-off-by: Len Brown <len.brown@intel.com>
2011-08-03arch/tile/mm/init.c: trivial: use BUG_ONJulia Lawall1-2/+1
Use BUG_ON(x) rather than if(x) BUG(); The semantic patch that fixes this problem is as follows: (http://coccinelle.lip6.fr/) // <smpl> @@ identifier x; @@ -if (x) BUG(); +BUG_ON(x); @@ identifier x; @@ -if (!x) BUG(); +BUG_ON(!x); // </smpl> Signed-off-by: Julia Lawall <julia@diku.dk> Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
2011-08-03Merge tag 'v3.0' of ↵Chris Metcalf1367-8728/+40132
git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6 into for-linus
2011-08-02ACPI: add missing _OSI stringsShaohua Li1-1/+7
Linux supports some optional features, but it should notify the BIOS about them via the _OSI method. Currently Linux doesn't notify any, which might make such features not work because the BIOS doesn't know about them. Jarosz has a system which needs this to make ACPI processor aggregator device work. Reported-by: "Jarosz, Sebastian" <sebastian.jarosz@intel.com> Signed-off-by: Shaohua Li <shaohua.li@intel.com> Acked-by: Matthew Garrett <mjg@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Len Brown <len.brown@intel.com>
2011-08-02ACPI: remove NID_INVALDavid Rientjes1-1/+0
b552a8c56db8 ("ACPI: remove NID_INVAL") removed the left over uses of NID_INVAL, but didn't actually remove the definition. Remove it. Signed-off-by: David Rientjes <rientjes@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Len Brown <len.brown@intel.com>
2011-08-02thermal: make THERMAL_HWMON implementation fully internalJean Delvare2-47/+92
THERMAL_HWMON is implemented inside the thermal_sys driver and has no effect on drivers implementing thermal zones, so they shouldn't see anything related to it in <linux/thermal.h>. Making the THERMAL_HWMON implementation fully internal has two advantages beyond the cleaner design: * This avoids rebuilding all thermal drivers if the THERMAL_HWMON implementation changes, or if CONFIG_THERMAL_HWMON gets enabled or disabled. * This avoids breaking the thermal kABI in these cases too, which should make distributions happy. The only drawback I can see is slightly higher memory fragmentation, as the number of kzalloc() calls will increase by one per thermal zone. But I doubt it will be a problem in practice, as I've never seen a system with more than two thermal zones. Signed-off-by: Jean Delvare <khali@linux-fr.org> Cc: Rene Herman <rene.herman@gmail.com> Acked-by: Guenter Roeck <guenter.roeck@ericsson.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Len Brown <len.brown@intel.com>
2011-08-02thermal: split hwmon lookup to a separate functionJean Delvare1-6/+19
We'll soon need to reuse it. Signed-off-by: Jean Delvare <khali@linux-fr.org> Cc: Rene Herman <rene.herman@gmail.com> Acked-by: Guenter Roeck <guenter.roeck@ericsson.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Len Brown <len.brown@intel.com>
2011-08-02thermal: hide CONFIG_THERMAL_HWMONJean Delvare2-15/+2
It's about time to revert 16d752397301b9 ("thermal: Create CONFIG_THERMAL_HWMON=n"). Anybody running a kernel >= 2.6.40 would also be running a recent enough version of lm-sensors. Actually having CONFIG_THERMAL_HWMON is pretty convenient so instead of dropping it, we keep it but hide it. Signed-off-by: Jean Delvare <khali@linux-fr.org> Cc: Rene Herman <rene.herman@gmail.com> Acked-by: Guenter Roeck <guenter.roeck@ericsson.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Len Brown <len.brown@intel.com>
2011-08-02MAINTAINERS: Add keyword match for of_match_table to device tree sectionMark Brown1-0/+1
If a patch is working with an of_match_table it's probably adding an OF binding to a driver in which case the binding ought to be reviewed by the device tree folks to make sure that things like the device matches are set up correctly. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2011-08-02of: constify property name parameters for helper functionsJamie Iles2-9/+13
The helper functions for reading u32 integers, u32 arrays and strings should have the property name as a const pointer. Cc: Grant Likely <grant.likely@secretlab.ca> Signed-off-by: Jamie Iles <jamie@jamieiles.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2011-08-02spi/pl022: remove function cannot exitLinus Walleij1-8/+3
The remove function in the PL022 driver cannot abort the remove function any way, so restructure the code so as not to make that assumption. Remove will now proceed no matter whether it can stop the transfer queue or not. Reported-by: Russell King <linux@arm.linux.org.uk> Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2011-08-02dm table: set flush capability based on underlying devicesMike Snitzer2-1/+43
DM has always advertised both REQ_FLUSH and REQ_FUA flush capabilities regardless of whether or not a given DM device's underlying devices also advertised a need for them. Block's flush-merge changes from 2.6.39 have proven to be more costly for DM devices. Performance regressions have been reported even when DM's underlying devices do not advertise that they have a write cache. Fix the performance regressions by configuring a DM device's flushing capabilities based on those of the underlying devices' capabilities. Signed-off-by: Mike Snitzer <snitzer@redhat.com> Signed-off-by: Alasdair G Kergon <agk@redhat.com>
2011-08-02dm crypt: optionally support discard requestsMilan Broz2-5/+65
Add optional parameter field to dmcrypt table and support "allow_discards" option. Discard requests bypass crypt queue processing. Bio is simple remapped to underlying device. Note that discard will be never enabled by default because of security consequences. It is up to the administrator to enable it for encrypted devices. (Note that userspace cryptsetup does not understand new optional parameters yet. Support for this will come later. Until then, you should use 'dmsetup' to enable and disable this.) Signed-off-by: Milan Broz <mbroz@redhat.com> Signed-off-by: Alasdair G Kergon <agk@redhat.com>
2011-08-02dm raid: add md raid1 supportJonathan Brassow1-10/+39
Support the MD RAID1 personality through dm-raid. Signed-off-by: Jonathan Brassow <jbrassow@redhat.com> Signed-off-by: Alasdair G Kergon <agk@redhat.com>
2011-08-02dm raid: support metadata devicesJonathan Brassow3-24/+412
Add the ability to parse and use metadata devices to dm-raid. Although not strictly required, without the metadata devices, many features of RAID are unavailable. They are used to store a superblock and bitmap. The role, or position in the array, of each device must be recorded in its superblock. This is to help with fault handling, array reshaping, and sanity checks. RAID 4/5/6 devices must be loaded in a specific order: in this way, the 'array_position' field helps validate the correctness of the mapping when it is loaded. It can be used during reshaping to identify which devices are added/removed. Fault handling is impossible without this field. For example, when a device fails it is recorded in the superblock. If this is a RAID1 device and the offending device is removed from the array, there must be a way during subsequent array assembly to determine that the failed device was the one removed. This is done by correlating the 'array_position' field and the bit-field variable 'failed_devices'. Signed-off-by: Jonathan Brassow <jbrassow@redhat.com> Signed-off-by: Alasdair G Kergon <agk@redhat.com>
2011-08-02dm raid: add write_mostly parameterJonathan Brassow2-2/+28
Add the write_mostly parameter to RAID1 dm-raid tables. This allows the user to set the WriteMostly flag on a RAID1 device that should normally be avoided for read I/O. Signed-off-by: Jonathan Brassow <jbrassow@redhat.com> Signed-off-by: Alasdair G Kergon <agk@redhat.com>
2011-08-02dm raid: add region_size parameterJonathan Brassow2-3/+83
Allow the user to specify the region_size. Ensures that the supplied value meets md's constraints, viz. the number of regions does not exceed 2^21. Signed-off-by: Jonathan Brassow <jbrassow@redhat.com> Signed-off-by: Alasdair G Kergon <agk@redhat.com>
2011-08-02dm raid: improve table parameters documentationJonathan Brassow1-46/+78
Add more information about some dm-raid table parameters and clarify how parameters are printed when 'dmsetup table' is issued. Signed-off-by: Jonathan Brassow <jbrassow@redhat.com> Signed-off-by: Alasdair G Kergon <agk@redhat.com>
2011-08-02dm ioctl: forbid multiple device specifiersMikulas Patocka1-0/+6
Exactly one of name, uuid or device must be specified when referencing an existing device. This removes the ambiguity (risking the wrong device being updated) if two conflicting parameters were specified. Previously one parameter got used and any others were ignored silently. Signed-off-by: Mikulas Patocka <mpatocka@redhat.com> Signed-off-by: Alasdair G Kergon <agk@redhat.com>
2011-08-02dm ioctl: introduce __get_dev_cellMikulas Patocka1-17/+24
Move logic to find device based on major/minor number to a separate function __get_dev_cell (similar to __get_uuid_cell and __get_name_cell). This makes the function __find_device_hash_cell more straightforward. Signed-off-by: Mikulas Patocka <mpatocka@redhat.com> Signed-off-by: Alasdair G Kergon <agk@redhat.com>
2011-08-02dm ioctl: fill in device parameters in more ioctlsMikulas Patocka2-29/+38
Move parameter filling from find_device to __find_device_hash_cell. This patch causes ioctls using __find_device_hash_cell (DM_DEV_REMOVE_CMD, DM_DEV_SUSPEND_CMD - resume, DM_TABLE_CLEAR_CMD) to return device parameters, bringing them into line with the other ioctls. Signed-off-by: Mikulas Patocka <mpatocka@redhat.com> Signed-off-by: Alasdair G Kergon <agk@redhat.com>
2011-08-02dm flakey: add corrupt_bio_byte featureMike Snitzer2-15/+159
Add corrupt_bio_byte feature to simulate corruption by overwriting a byte at a specified position with a specified value during intervals when the device is "down". Signed-off-by: Mike Snitzer <snitzer@redhat.com> Signed-off-by: Alasdair G Kergon <agk@redhat.com>
2011-08-02dm flakey: add drop_writesMike Snitzer2-14/+78
Add 'drop_writes' option to drop writes silently while the device is 'down'. Reads are not touched. Signed-off-by: Mike Snitzer <snitzer@redhat.com> Signed-off-by: Alasdair G Kergon <agk@redhat.com>
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