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2008-07-08x86: modify Kconfig to allow up to 4096 cpusMike Travis
* Increase the limit of NR_CPUS to 4096 and introduce a boolean called "MAXSMP" which when set (e.g. "allyesconfig"), will set NR_CPUS = 4096 and NODES_SHIFT = 9 (512). * Changed max setting for NODES_SHIFT from 15 to 9 to accurately reflect the real limit. Signed-off-by: Mike Travis <travis@sgi.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-07-08x86: fix remove cpu_pda table patchMike Travis
Mike Travis wrote: > Ingo Molnar wrote: >> * Mike Travis <travis@sgi.com> wrote: >> >>> [Ingo - please replace "PATCH 07/11" with this one.] >>> >>> * Remove 544k bytes from the kernel by removing the boot_cpu_pda >>> array from the data section and allocating it during startup. >>> >>> Fixed panic in setup_per_cpu_areas when HOTPLUG_CPU not set. >>> >>> For inclusion into sched-devel/latest tree. >> sched-devel.git randconfig testing found another crash with your queue: >> >> [ 0.111060] Brought up 1 CPUs >> [ 0.111986] Total of 1 processors activated (4022.73 BogoMIPS). >> [ 0.112987] Testing NMI watchdog ... <1>BUG: unable to handle kernel NULL pointer dereference at 0000000000000040 >> [ 0.114982] IP: [<ffffffff8180d4a0>] check_nmi_watchdog+0xb0/0x210 >> [ 0.114982] PGD 0 >> [ 0.114982] Oops: 0000 [1] SMP >> [ 0.114982] CPU 0 >> [............] >> >> http://redhat.com/~mingo/misc/config-Mon_Apr_28_23_25_25_CEST_2008.bad >> http://redhat.com/~mingo/misc/log-Mon_Apr_28_23_25_25_CEST_2008.bad >> >> Ingo > > Hi Ingo, > > I need a bit more information on your hardware configuration. Building a > kernel with the above config file started up fine on both the Intel and AMD > boxes. > > Based on the above output it looks like it might be a UP machine? ... Ok, I think I found it. In check_nmi_watchdog(): for (cpu = 0; cpu < NR_CPUS; cpu++) prev_nmi_count[cpu] = cpu_pda(cpu)->__nmi_count; As I mentioned it works fine on both of my systems so could you try it out? Thanks! Mike -- * Change function check_nmi_watchdog() to use nr_cpu_ids instead of NR_CPUS. Based on: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6.git + sched-devel/latest .../mingo/linux-2.6-sched-devel.git Signed-off-by: Mike Travis <travis@sgi.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-07-08x86: don't call pxm_to_node againYinghai Lu
also make bus_numa work even if ACPI_NUMA is not defined. don't call pxm_to_node again, and use node directly. Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-08x86: make dev_to_node return online nodeYinghai Lu
a numa system (with multi HT chains) may return node without ram. Aka it is not online. Try to get an online node, otherwise return -1. Signed-off-by: Yinghai Lu <yinghai.lu@sun.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-07-06Merge branch 'kvm-updates-2.6.26' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/avi/kvm * 'kvm-updates-2.6.26' of git://git.kernel.org/pub/scm/linux/kernel/git/avi/kvm: KVM: IOAPIC: Fix level-triggered irq injection hang x86: KVM guest: Add memory clobber to hypercalls
2008-07-06pxamci: fix byte aligned DMA transfersPhilipp Zabel
The pxa27x DMA controller defaults to 64-bit alignment. This caused the SCR reads to fail (and, depending on card type, error out) when card->raw_scr was not aligned on a 8-byte boundary. For performance reasons all scatter-gather addresses passed to pxamci_request should be aligned on 8-byte boundaries, but if this can't be guaranteed, byte aligned DMA transfers in the have to be enabled in the controller to get correct behaviour. Signed-off-by: Philipp Zabel <philipp.zabel@gmail.com> Signed-off-by: Pierre Ossman <drzeus@drzeus.cx> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-07-06Revert "USB: don't explicitly reenable root-hub status interrupts"Linus Torvalds
This reverts commit e872154921a6b5256a3c412dd69158ac0b135176. Andrey Borzenkov reports that it resulted in a totally hung machine for him when loading the OHCI driver. Extensive netconsole capture with SysRq output shows that modprobe gets stuck in ohci_hub_status_data() when probing and enabling the OHCI controller, see for example http://lkml.org/lkml/2008/7/5/236 for an analysis. The problem appears to be an interrupt flood triggered by the commit that gets reverted, and Andrey confirmed that the revert makes things work for him again. Reported-and-tested-by: Andrey Borzenkov <arvidjaar@mail.ru> Acked-by: Alan Stern <stern@rowland.harvard.edu> Acked-by: David Brownell <david-b@pacbell.net> Cc: Greg Kroah-Hartman <gregkh@suse.de> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-07-06KVM: IOAPIC: Fix level-triggered irq injection hangMark McLoughlin
The "remote_irr" variable is used to indicate an interrupt which has been received by the LAPIC, but not acked. In our EOI handler, we unset remote_irr and re-inject the interrupt if the interrupt line is still asserted. However, we do not set remote_irr here, leading to a situation where if kvm_ioapic_set_irq() is called, then we go ahead and call ioapic_service(). This means that IRR is re-asserted even though the interrupt is currently in service (i.e. LAPIC IRR is cleared and ISR/TMR set) The issue with this is that when the currently executing interrupt handler finishes and writes LAPIC EOI, then TMR is unset and EOI sent to the IOAPIC. Since IRR is now asserted, but TMR is not, then when the second interrupt is handled, no EOI is sent and if there is any pending interrupt, it is not re-injected. This fixes a hang only seen while running mke2fs -j on an 8Gb virtio disk backed by a fully sparse raw file, with aliguori "avoid fragmented virtio-blk transfers by copying" changes. Signed-off-by: Mark McLoughlin <markmc@redhat.com> Acked-by: Marcelo Tosatti <mtosatti@redhat.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-07-06x86: KVM guest: Add memory clobber to hypercallsAnthony Liguori
Hypercalls can modify arbitrary regions of memory. Make sure to indicate this in the clobber list. This fixes a hang when using KVM_GUEST kernel built with GCC 4.3.0. This was originally spotted and analyzed by Marcelo. Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-07-05Linux 2.6.26-rc9Linus Torvalds
2008-07-05Fix pagemap_read() use of struct mm_walkAndrew Morton
Fix some issues in pagemap_read noted by Alexey: - initialize pagemap_walk.mm to "mm" , so the code starts working as advertised - initialize ->private to "&pm" so it wouldn't immediately oops in pagemap_pte_hole() - unstatic struct pagemap_walk, so two threads won't fsckup each other (including those started by root, including flipping ->mm when you don't have permissions) - pagemap_read() contains two calls to ptrace_may_attach(), second one looks unneeded. - avoid possible kmalloc(0) and integer wraparound. Cc: Alexey Dobriyan <adobriyan@gmail.com> Cc: Matt Mackall <mpm@selenic.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> [ Personally, I'd just remove the functionality entirely - Linus ] Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-07-05Move _RET_IP_ and _THIS_IP_ to include/linux/kernel.hEduard - Gabriel Munteanu
These two macros are useful beyond lock debugging. Moved definitions from include/linux/debug_locks.h to include/linux/kernel.h, so code that needs them does not have to include the former, which would have been a less intuitive choice of a header. Signed-off-by: Eduard - Gabriel Munteanu <eduard.munteanu@linux360.ro> Acked-by: Pekka Enberg <penberg@cs.helsinki.fi> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-07-05Merge branch 'core-fixes-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'core-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: softlockup: print a module list on being stuck
2008-07-05Merge branch 'x86-fixes-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: x86 ACPI: fix resume from suspend to RAM on uniprocessor x86-64 x86 ACPI: normalize segment descriptor register on resume
2008-07-05Fix clear_refs_write() use of struct mm_walkAndrew Morton
Don't use a static entry, so as to prevent races during concurrent use of this function. Reported-by: Alexey Dobriyan <adobriyan@gmail.com> Cc: Matt Mackall <mpm@selenic.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-07-05Merge git://git.kernel.org/pub/scm/linux/kernel/git/bart/ide-2.6Linus Torvalds
* git://git.kernel.org/pub/scm/linux/kernel/git/bart/ide-2.6: ide: ide_unregister() locking bugfix ide: ide_unregister() warm-plug bugfix ide: fix hwif->gendev refcounting
2008-07-05ahci: give another shot at clearing all bits in irq_statTejun Heo
Commit ea0c62f7cf70f13a67830471b613337bd0c9a62e tried to clear all bits in irq_stat but it didn't actually achieve that as irq_stat was anded with port_map right after read. This patch makes ahci driver always use the unmasked value to clear irq_status. While at it, add explanation on the peculiarities of ahci IRQ clearing. This was spotted by Linus Torvalds. Signed-off-by: Tejun Heo <tj@kernel.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-07-05ide: ide_unregister() locking bugfixBartlomiej Zolnierkiewicz
Holding ide_lock for ide_release_dma_engine() call is unnecessary and triggers WARN_ON(irqs_disabled()) in dma_free_coherent(). Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
2008-07-05ide: ide_unregister() warm-plug bugfixBartlomiej Zolnierkiewicz
Fix ide_unregister() to work for ports with no devices attached to them. Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
2008-07-05ide: fix hwif->gendev refcountingBartlomiej Zolnierkiewicz
class->dev_release is called by device_release() iff dev->release is not present so ide_port_class_release() is never called and the last hwif->gendev reference is not dropped. Fix it by removing ide_port_class_release() and get_device() call from ide_register_port() (device_create_drvdata() takes a hwif->gendev reference anyway). This patch fixes hang on wait_for_completion(&hwif->gendev_rel_comp) in ide_unregister() reported by Pavel Machek. Cc: Pavel Machek <pavel@suse.cz> Cc: "Rafael J. Wysocki" <rjw@sisk.pl> Cc: Greg KH <greg@kroah.com> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
2008-07-05softlockup: print a module list on being stuckArjan van de Ven
Most places in the kernel that go BUG: print a module list (which is very useful for doing statistics and finding patterns), however the softlockup detector does not do this yet. This patch adds the one line change to fix this gap. Signed-off-by: Arjan van de Ven <arjan@linux.intel.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-05Merge branch 'x86/s2ram-fix' into x86/urgentIngo Molnar
2008-07-05x86 ACPI: fix resume from suspend to RAM on uniprocessor x86-64Rafael J. Wysocki
Since the trampoline code is now used for ACPI resume from suspend to RAM, the trampoline page tables have to be fixed up during boot not only on SMP systems, but also on UP systems that use the trampoline. Reference: http://bugzilla.kernel.org/show_bug.cgi?id=10923 Reported-by: Dionisus Torimens <djtm@gmx.net> Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Cc: Andi Kleen <andi@firstfloor.org> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: pm list <linux-pm@lists.linux-foundation.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-05x86 ACPI: normalize segment descriptor register on resumeH. Peter Anvin
Some Dell laptops enter resume with apparent garbage in the segment descriptor registers (almost certainly the result of a botched transition from protected to real mode.) The only way to clean that up is to enter protected mode ourselves and clean out the descriptor registers. This fixes resume on Dell XPS M1210 and Dell D620. Reference: http://bugzilla.kernel.org/show_bug.cgi?id=10927 Signed-off-by: H. Peter Anvin <hpa@zytor.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Pavel Machek <pavel@ucw.cz> Cc: pm list <linux-pm@lists.linux-foundation.org> Cc: Len Brown <lenb@kernel.org> Signed-off-by: Ingo Molnar <mingo@elte.hu> Tested-by: Kirill A. Shutemov <kirill@shutemov.name> Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-04mempolicy: mask off internal flags for userspace APIDavid Rientjes
Flags considered internal to the mempolicy kernel code are stored as part of the "flags" member of struct mempolicy. Before exposing a policy type to userspace via get_mempolicy(), these internal flags must be masked. Flags exposed to userspace, however, should still be returned to the user. Signed-off-by: David Rientjes <rientjes@google.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-07-04Merge branch 'x86-fixes-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: xen: fix address truncation in pte mfn<->pfn conversion arch/x86/mm/init_64.c: early_memtest(): fix types x86: fix Intel Mac booting with EFI
2008-07-04mmc: don't use DMA on newer ENE controllersPierre Ossman
Even the newer ENE controllers have bugs in their DMA engine that make it too dangerous to use. Disable it until someone has figured out under which conditions it corrupts data. This has caused problems at least once, and can be found as bug report 10925 in the kernel bugzilla. Signed-off-by: Pierre Ossman <drzeus@drzeus.cx> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-07-04doc: document the relax_domain_level kernel boot argumentPaul Jackson
Document the kernel boot parameter: relax_domain_level=. Signed-off-by: Paul Jackson <pj@sgi.com> Cc: Michael Kerrisk <mtk.manpages@googlemail.com> Reviewed-by: Li Zefan <lizf@cn.fujitsu.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-07-04devcgroup: fix odd behaviour when writing 'a' to devices.allowLi Zefan
# cat /devcg/devices.list a *:* rwm # echo a > devices.allow # cat /devcg/devices.list a *:* rwm a 0:0 rwm This is odd and maybe confusing. With this patch, writing 'a' to devices.allow will add 'a *:* rwm' to the whitelist. Also a few fixes and updates to the document. Signed-off-by: Li Zefan <lizf@cn.fujitsu.com> Cc: Pavel Emelyanov <xemul@openvz.org> Cc: Serge E. Hallyn <serue@us.ibm.com> Cc: Paul Menage <menage@google.com> Cc: Balbir Singh <balbir@in.ibm.com> Cc: James Morris <jmorris@namei.org> Cc: Chris Wright <chrisw@sous-sol.org> Cc: Stephen Smalley <sds@tycho.nsa.gov> 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>
2008-07-04Update MAINTAINERS file for the TPM device driverRajiv Andrade
Acked-By: Debora Velarde <debora@linux.vnet.ibm.com> Cc: <zohar@linux.vnet.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-07-04mm: switch node meminfo Active & Inactive pages to KbytesJohn Blackwood
There is a bug in the output of /sys/devices/system/node/node[n]/meminfo where the Active and Inactive values are in pages instead of Kbytes. Looks like this occurred back in 2.6.20 when the code was changed over to use node_page_state(). Cc: <stable@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-07-04cpumask: introduce new APIsStephen Rothwell
In linux-next there is a commit ("x86: Add performance variants of cpumask operators") which, as part of the 4096 cpu support work adds some new APIs for dealing with cpu masks. Add trivial versions of these now so that subsystems can update in a timely manner and avoid conflicts in linux-next and the next merge window. Cc: Mike Travis <travis@sgi.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@elte.hu> Signed-off-by: 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>
2008-07-04olpc: sdhci: add quirk for the Marvell CaFe's interrupt timeoutAndres Salomon
The CaFe chip has a hardware bug that ends up with us getting a timeout value that's too small, causing the following sorts of problems: [ 60.525138] mmcblk0: error -110 transferring data [ 60.531477] end_request: I/O error, dev mmcblk0, sector 1484353 [ 60.533371] Buffer I/O error on device mmcblk0p2, logical block 181632 [ 60.533371] lost page write due to I/O error on mmcblk0p2 Presumably this is an off-by-one error in the hardware. Incrementing the timeout count value that we stuff into the TIMEOUT_CONTROL register gets us a value that works. This bug was originally discovered by Pierre Ossman, I believe. [thanks to Robert Millan for proving that this was still a problem] Signed-off-by: Andres Salomon <dilinger@debian.org> Cc: Pierre Ossman <drzeus-list@drzeus.cx> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-07-04olpc: sdhci: add quirk for the Marvell CaFe's vdd/powerup issueAndres Salomon
This has been sitting around unloved for way too long.. The Marvell CaFe chip's SD implementation chokes during card insertion if one attempts to set the voltage and power up in the same SDHCI_POWER_CONTROL register write. This adds a quirk that does that particular dance in two steps. It also adds an entry to pci_ids.h for the CaFe chip's SD device. Signed-off-by: Andres Salomon <dilinger@debian.org> Cc: Pierre Ossman <drzeus-list@drzeus.cx> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-07-04cciss: read config to obtain max outstanding commands per controllerMike Miller
This patch changes the way we determine the maximum number of outstanding commands for each controller. Most Smart Array controllers can support up to 1024 commands, the notable exceptions are the E200 and E200i. The next generation of controllers which were just added support a mode of operation called Zero Memory Raid (ZMR). In this mode they only support 64 outstanding commands. In Full Function Raid (FFR) mode they support 1024. We have been setting the queue depth by arbitrarily assigning some value for each controller. We needed a better way to set the queue depth to avoid lots of annoying "fifo full" messages. So we made the driver a little smarter. We now read the config table and subtract 4 from the returned value. The -4 is to allow some room for ioctl calls which are not tracked the same way as io commands are tracked. Please consider this for inclusion. Signed-off-by: Mike Miller <mike.miller@hp.com> Cc: Jens Axboe <jens.axboe@oracle.com> Cc: <stable@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-07-04MAINTAINERS: update the email address of Andreas DilgerGeert Uytterhoeven
The old one bounces. Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Andreas Dilger <adilger@sun.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-07-04cpusets: document proc status cpus and mems allowed listsPaul Jackson
Provide a little documentation for the two new fields, Cpus_allowed_list and Mems_allowed_list, that were added to each /proc/<pid>/status file a while back. Signed-off-by: Paul Jackson <pj@sgi.com> Acked-by: Michael Kerrisk <mtk.manpages@gmail.com> 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>
2008-07-04Alpha Linux kernel fails with inconsistent kallsyms dataBastian Blank
The build of the Alpha Linux kernel currently fails[1] with inconsistent kallsyms data. As I never saw that before, I thought about hardware problems. But in fact it is a bug in the Linux kernel. The end of the rodata section is marked with the "__end_rodata" symbol. This symbol have different aligning constraints than the inittext parts and therefor the start marked "_sinittext". Because of that the __end_rodata symbol shifts between < _sinittext and == _sinittext. The later variant is seen as a code symbol and recorded in the kallsyms data. On fix would be to move the exception table a little bit and get some space between that two areas. [1]: http://buildd.debian.org/fetch.cgi?pkg=linux-2.6&arch=alpha&ver=2.6.25-5&stamp=1213919009&file=log&as=raw Cc: maximilian attems <max@stro.at> Cc: Richard Henderson <rth@twiddle.net> Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-07-04security: filesystem capabilities: fix CAP_SETPCAP handlingAndrew G. Morgan
The filesystem capability support meaning for CAP_SETPCAP is less powerful than the non-filesystem capability support. As such, when filesystem capabilities are configured, we should not permit CAP_SETPCAP to 'enhance' the current process through strace manipulation of a child process. Signed-off-by: Andrew G. Morgan <morgan@kernel.org> Acked-by: Serge Hallyn <serue@us.ibm.com> Cc: David Howells <dhowells@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-07-04security: filesystem capabilities: fix fragile setuid fixup codeAndrew G. Morgan
This commit includes a bugfix for the fragile setuid fixup code in the case that filesystem capabilities are supported (in access()). The effect of this fix is gated on filesystem capability support because changing securebits is only supported when filesystem capabilities support is configured.) [akpm@linux-foundation.org: coding-style fixes] Signed-off-by: Andrew G. Morgan <morgan@kernel.org> Acked-by: Serge Hallyn <serue@us.ibm.com> Acked-by: David Howells <dhowells@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-07-04doc: doc maintainersRandy Dunlap
Maintain the kernel's Documentation/ tree. This includes tree layout and contents, although not much in terms of new content production. That will usually have to be done by someone familiar with the software, at least in some rough form. Includes review and editorial assistance for people contributing changes to /Documentation. Also includes prodding people for content if something is in need of documentation. Signed-off-by: Randy Dunlap <rdunlap@xenotime.net> Acked-by: Michael Kerrisk <mtk.manpages@gmail.com> Cc: Jonathan Corbet <corbet@lwn.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-07-04spi: fix the read path in spidevSebastian Siewior
This got broken by the recent "fix rmmod $spi_driver while spidev-user is active". I tested the rmmod & write path but didn't check the read path. I am sorry. The read logic changed and spidev_sync_read() + spidev_sync_write() do not return zero on success anymore but the number of bytes that has been transfered over the bus. This patch changes the logic and copy_to_user() gets called again. The write path returns the number of bytes which are written to the underlying device what may be less than the requested size. This patch makes the same change to the read path or else we request a read of 20 bytes, get 10, don't call copy to user and report to the user that we read 10 bytes. [akpm@linux-foundation.org: remove test of known-to-be-zero local] Signed-off-by: Sebastian Siewior <bigeasy@linutronix.de> Acked-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-07-04cgroups: document the effect of attaching PID 0 to a cgroupLi Zefan
Document that a pid of zero(0) can be used to refer to the current task when attaching a task to a cgroup, as in the following usage: # echo 0 > /dev/cgroup/tasks This is consistent with existing cpuset behavior. Signed-off-by: Li Zefan <lizf@cn.fujitsu.com> Acked-by: Paul Jackson <pj@sgi.com> Acked-by: Dhaval Giani <dhaval@linux.vnet.ibm.com> Cc: Paul Menage <menage@google.com> Cc: Balbir Singh <balbir@in.ibm.com> Cc: Andrea Righi <righi.andrea@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-07-04MFD maintainerSamuel Ortiz
We probably need someone to look after the few drivers/mfd patches coming every now and then. As agreed with Andrew, I'm ok to do so and my employer is fine with me spending a few working hours on it, if needed. Ben, Philipp, feel free to add your names there too if you wish. Signed-off-by: Samuel Ortiz <sameo@openedhand.com> Cc: "pHilipp Zabel" <philipp.zabel@gmail.com> Cc: Ian Molton <spyro@f2s.com> Cc: Ben Dooks <ben-linux@fluff.org> Cc: Dmitry Baryshkov <dbaryshkov@gmail.com> Cc: Russell King <rmk@arm.linux.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-07-04w100fb: add 80 MHz modelinePhilipp Zabel
This is needed for HTC Blueangel (w3200). At 96MHz its screen flickers. Signed-off-by: Philipp Zabel <philipp.zabel@gmail.com> Acked-by: Ian Molton <spyro@f2s.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-07-04w100fb: do not depend on SHARPSLPhilipp Zabel
Apart from Sharp SL-Cxx series, there are a few other devices that have ATI Imageon chips, among them HP iPAQ hx4700. Signed-off-by: Philipp Zabel <philipp.zabel@gmail.com> Acked-by: Ian Molton <spyro@f2s.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-07-04add kernel-doc for simple_read_from_buffer and memory_read_from_bufferAkinobu Mita
Add kernel-doc comments describing simple_read_from_buffer and memory_read_from_buffer. Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com> Cc: Christoph Hellwig <hch@lst.de> Cc: "Randy.Dunlap" <rdunlap@xenotime.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-07-04ntfs: update help textJess Guerrero
The url in the help text for ntfs should be updated. Acked-by: Anton Altaparmakov <aia21@cantab.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-07-04man-pages is supportedMichael Kerrisk
Starting last month, I reached a long-time goal: man-pages finally has a paid, full-time maintainer, thanks to a fellowship from the Linux Foundation. It's still a little unclear how long the LF money will last for the fellowship, but for the foreseeable future, I'll be working on: * Properly documenting every new Linux kernel-userland (and glibc) API, and every API change, that is released into the mainline kernel, ideally before actual release. (That's the ideal, but there's a quite a backlog, so I'm not going to achieve the ideal immediately.) * Testing new APIs, again ideally before they are released into the mainline kernel, and probably doing some light bug fixing while I'm at it (e.g., the recent utimensat() work). * Design review of new APIs, which of course can only usefully be done before they are released into the mainline kernel. * And of course accepting patches and dealing with bug reports for existing man pages. Signed-off-by: Michael Kerrisk <mtk.manpages@googlemail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-07-04Introduce rculist.hStephen Rothwell
In linux-next there is a commit ("rcu: split list.h and move rcu-protected lists into rculist.h") that moved the rcu related list iterators from list.h to rculist.h. Add a trivial version of the file now so that various subsystem trees can start using it now for -next changes and so reduce the build errors caused by adding uses of the moved functions. Cc: Franck Bui-Huu <fbuihuu@gmail.com> Acked-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Cc: Josh Triplett <josh@kernel.org> Acked-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: 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>
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