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2010-09-11Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6Linus Torvalds
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6: (28 commits) ipheth: remove incorrect devtype to WWAN MAINTAINERS: Add CAIF sctp: fix test for end of loop KS8851: Correct RX packet allocation udp: add rehash on connect() net: blackhole route should always be recalculated ipv4: Suppress lockdep-RCU false positive in FIB trie (3) niu: Fix kernel buffer overflow for ETHTOOL_GRXCLSRLALL ipvs: fix active FTP gro: Re-fix different skb headrooms via-velocity: Turn scatter-gather support back off. ipv4: Fix reverse path filtering with multipath routing. UNIX: Do not loop forever at unix_autobind(). PATCH: b44 Handle RX FIFO overflow better (simplified) irda: off by one 3c59x: Fix deadlock in vortex_error() netfilter: discard overlapping IPv6 fragment ipv6: discard overlapping fragment net: fix tx queue selection for bridged devices implementing select_queue bonding: Fix jiffies overflow problems (again) ... Fix up trivial conflicts due to the same cgroup API thinko fix going through both Andrew and the networking tree. However, there were small differences between the two, with Andrew's version generally being the nicer one, and the one I merged first. So pick that one. Conflicts in: include/linux/cgroup.h and kernel/cgroup.c
2010-09-10Merge branch 'for-linus' of git://git.kernel.dk/linux-2.6-blockLinus Torvalds
* 'for-linus' of git://git.kernel.dk/linux-2.6-block: block: Range check cpu in blk_cpu_to_group scatterlist: prevent invalid free when alloc fails writeback: Fix lost wake-up shutting down writeback thread writeback: do not lose wakeup events when forking bdi threads cciss: fix reporting of max queue depth since init block: switch s390 tape_block and mg_disk to elevator_change() block: add function call to switch the IO scheduler from a driver fs/bio-integrity.c: return -ENOMEM on kmalloc failure bio-integrity.c: remove dependency on __GFP_NOFAIL BLOCK: fix bio.bi_rw handling block: put dev->kobj in blk_register_queue fail path cciss: handle allocation failure cfq-iosched: Documentation help for new tunables cfq-iosched: blktrace print per slice sector stats cfq-iosched: Implement tunable group_idle cfq-iosched: Do group share accounting in IOPS when slice_idle=0 cfq-iosched: Do not idle if slice_idle=0 cciss: disable doorbell reset on reset_devices blkio: Fix return code for mkdir calls
2010-09-09Merge branch 'vhost-net' of ↵David S. Miller
git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost
2010-09-09Merge branch 'upstream-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/jgarzik/libata-dev * 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jgarzik/libata-dev: libata-sff: Reenable Port Multiplier after libata-sff remodeling. libata: skip EH autopsy and recovery during suspend ahci: AHCI and RAID mode SATA patch for Intel Patsburg DeviceIDs ata_piix: IDE Mode SATA patch for Intel Patsburg DeviceIDs libata,pata_via: revert ata_wait_idle() removal from ata_sff/via_tf_load() ahci: fix hang on failed softreset pata_artop: Fix device ID parity check
2010-09-09libata-sff: Reenable Port Multiplier after libata-sff remodeling.Gwendal Grignou
Keep track of the link on the which the current request is in progress. It allows support of links behind port multiplier. Not all libata-sff is PMP compliant. Code for native BMDMA controller does not take in accound PMP. Tested on Marvell 7042 and Sil7526. Signed-off-by: Gwendal Grignou <gwendal@google.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
2010-09-09libata: skip EH autopsy and recovery during suspendTejun Heo
For some mysterious reason, certain hardware reacts badly to usual EH actions while the system is going for suspend. As the devices won't be needed until the system is resumed, ask EH to skip usual autopsy and recovery and proceed directly to suspend. Signed-off-by: Tejun Heo <tj@kernel.org> Tested-by: Stephan Diestelhorst <stephan.diestelhorst@amd.com> Cc: stable@kernel.org Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
2010-09-09mm: page allocator: calculate a better estimate of NR_FREE_PAGES when memory ↵Christoph Lameter
is low and kswapd is awake Ordinarily watermark checks are based on the vmstat NR_FREE_PAGES as it is cheaper than scanning a number of lists. To avoid synchronization overhead, counter deltas are maintained on a per-cpu basis and drained both periodically and when the delta is above a threshold. On large CPU systems, the difference between the estimated and real value of NR_FREE_PAGES can be very high. If NR_FREE_PAGES is much higher than number of real free page in buddy, the VM can allocate pages below min watermark, at worst reducing the real number of pages to zero. Even if the OOM killer kills some victim for freeing memory, it may not free memory if the exit path requires a new page resulting in livelock. This patch introduces a zone_page_state_snapshot() function (courtesy of Christoph) that takes a slightly more accurate view of an arbitrary vmstat counter. It is used to read NR_FREE_PAGES while kswapd is awake to avoid the watermark being accidentally broken. The estimate is not perfect and may result in cache line bounces but is expected to be lighter than the IPI calls necessary to continually drain the per-cpu counters while kswapd is awake. Signed-off-by: Christoph Lameter <cl@linux.com> Signed-off-by: Mel Gorman <mel@csn.ul.ie> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-09-09swap: discard while swapping only if SWAP_FLAG_DISCARDHugh Dickins
Tests with recent firmware on Intel X25-M 80GB and OCZ Vertex 60GB SSDs show a shift since I last tested in December: in part because of firmware updates, in part because of the necessary move from barriers to awaiting completion at the block layer. While discard at swapon still shows as slightly beneficial on both, discarding 1MB swap cluster when allocating is now disadvanteous: adds 25% overhead on Intel, adds 230% on OCZ (YMMV). Surrender: discard as presently implemented is more hindrance than help for swap; but might prove useful on other devices, or with improvements. So continue to do the discard at swapon, but make discard while swapping conditional on a SWAP_FLAG_DISCARD to sys_swapon() (which has been using only the lower 16 bits of int flags). We can add a --discard or -d to swapon(8), and a "discard" to swap in /etc/fstab: matching the mount option for btrfs, ext4, fat, gfs2, nilfs2. Signed-off-by: Hugh Dickins <hughd@google.com> Cc: Christoph Hellwig <hch@lst.de> Cc: Nigel Cunningham <nigel@tuxonice.net> Cc: Tejun Heo <tj@kernel.org> Cc: Jens Axboe <jaxboe@fusionio.com> Cc: James Bottomley <James.Bottomley@hansenpartnership.com> Cc: "Martin K. Petersen" <martin.petersen@oracle.com> Cc: <stable@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-09-09swap: revert special hibernation allocationHugh Dickins
Please revert 2.6.36-rc commit d2997b1042ec150616c1963b5e5e919ffd0b0ebf "hibernation: freeze swap at hibernation". It complicated matters by adding a second swap allocation path, just for hibernation; without in any way fixing the issue that it was intended to address - page reclaim after fixing the hibernation image might free swap from a page already imaged as swapcache, letting its swap be reallocated to store a different page of the image: resulting in data corruption if the imaged page were freed as clean then swapped back in. Pages freed to si->swap_map were still in danger of being reallocated by the alternative allocation path. I guess it inadvertently fixed slow SSD swap allocation for hibernation, as reported by Nigel Cunningham: by missing out the discards that occur on the usual swap allocation path; but that was unintentional, and needs a separate fix. Signed-off-by: Hugh Dickins <hughd@google.com> Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Cc: "Rafael J. Wysocki" <rjw@sisk.pl> Cc: Ondrej Zary <linux@rainbow-software.org> Cc: Andrea Gelmini <andrea.gelmini@gmail.com> Cc: Balbir Singh <balbir@in.ibm.com> Cc: Andrea Arcangeli <aarcange@redhat.com> Cc: Nigel Cunningham <nigel@tuxonice.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-09-09gpio: doc updatesDavid Brownell
There's been some recent confusion about error checking GPIO numbers. briefly, it should be handled mostly during setup, when gpio_request() is called, and NEVER by expectig gpio_is_valid to report more than never-usable GPIO numbers. [akpm@linux-foundation.org: terminate unterminated comment] Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Cc: Eric Miao" <eric.y.miao@gmail.com> Cc: "Ryan Mallon" <ryan@bluewatersys.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-09-09gpio: sx150x: correct and refine reset-on-probe behaviorGregory Bean
Replace the arbitrary software-reset call from the device-probe method, because: - It is defective. To work correctly, it should be two byte writes, not a single word write. As it stands, it does nothing. - Some devices with sx150x expanders installed have their NRESET pins ganged on the same line, so resetting one causes the others to reset - not a nice thing to do arbitrarily! - The probe, usually taking place at boot, implies a recent hard-reset, so a software reset at this point is just a waste of energy anyway. Therefore, make it optional, defaulting to off, as this will match the common case of probing at powerup and also matches the current broken no-op behavior. Signed-off-by: Gregory Bean <gbean@codeaurora.org> Reviewed-by: Jean Delvare <khali@linux-fr.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-09-09mm: fix swapin race conditionAndrea Arcangeli
The pte_same check is reliable only if the swap entry remains pinned (by the page lock on swapcache). We've also to ensure the swapcache isn't removed before we take the lock as try_to_free_swap won't care about the page pin. One of the possible impacts of this patch is that a KSM-shared page can point to the anon_vma of another process, which could exit before the page is freed. This can leave a page with a pointer to a recycled anon_vma object, or worse, a pointer to something that is no longer an anon_vma. [riel@redhat.com: changelog help] Signed-off-by: Andrea Arcangeli <aarcange@redhat.com> Acked-by: Hugh Dickins <hughd@google.com> Reviewed-by: Rik van Riel <riel@redhat.com> Cc: <stable@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-09-09cgroups: fix API thinkoMichael S. Tsirkin
Add cgroup_attach_task_all() The existing cgroup_attach_task_current_cg() API is called by a thread to attach another thread to all of its cgroups; this is unsuitable for cases where a privileged task wants to attach itself to the cgroups of a less privileged one, since the call must be made from the context of the target task. This patch adds a more generic cgroup_attach_task_all() API that allows both the source task and to-be-moved task to be specified. cgroup_attach_task_current_cg() becomes a specialization of the more generic new function. [menage@google.com: rewrote changelog] [akpm@linux-foundation.org: address reviewer comments] Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Tested-by: Alex Williamson <alex.williamson@redhat.com> Acked-by: Paul Menage <menage@google.com> Cc: Li Zefan <lizf@cn.fujitsu.com> Cc: Ben Blum <bblum@google.com> Cc: Sridhar Samudrala <sri@us.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-09-09kfifo: add parenthesis for macro parameter referenceHuang Ying
Some macro parameter references inside typeof() operator are not enclosed with parenthesis. It should be safer to add them. Signed-off-by: Huang Ying <ying.huang@intel.com> Acked-by: Stefani Seibold <stefani@seibold.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-09-09mmc: avoid getting CID on SDIO-only cardsDavid Vrabel
The introduction of support for SD combo cards breaks the initialization of all CSR SDIO chips. The GO_IDLE (CMD0) in mmc_sd_get_cid() causes CSR chips to be reset (this is non-standard behavior). When initializing an SDIO card check for a combo card by using the memory present bit in the R4 response to IO_SEND_OP_COND (CMD5). This avoids the call to mmc_sd_get_cid() on an SDIO-only card. Signed-off-by: David Vrabel <david.vrabel@csr.com> Acked-by: Michal Mirolaw <mirq-linux@rere.qmqm.pl> Cc: <linux-mmc@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-09-09lglock: make lg_lock_global() actually lock globallyJonathan Corbet
lg_lock_global() currently only acquires spinlocks for online CPUs, but it's meant to lock all possible CPUs. Lglock-protected resources may be associated with removed CPUs - and, indeed, that could happen with the per-superblock open files lists. At Nick's suggestion, change for_each_online_cpu() to for_each_possible_cpu() to protect accesses to those resources. Cc: Al Viro <viro@ZenIV.linux.org.uk> Acked-by: Nick Piggin <npiggin@kernel.dk> Signed-off-by: Jonathan Corbet <corbet@lwn.net> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-09-09mm: Move vma_stack_continue into mm.hStefan Bader
So it can be used by all that need to check for that. Signed-off-by: Stefan Bader <stefan.bader@canonical.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-09-08Merge branch 'master' of ↵David S. Miller
master.kernel.org:/pub/scm/linux/kernel/git/torvalds/linux-2.6
2010-09-08udp: add rehash on connect()Eric Dumazet
commit 30fff923 introduced in linux-2.6.33 (udp: bind() optimisation) added a secondary hash on UDP, hashed on (local addr, local port). Problem is that following sequence : fd = socket(...) connect(fd, &remote, ...) not only selects remote end point (address and port), but also sets local address, while UDP stack stored in secondary hash table the socket while its local address was INADDR_ANY (or ipv6 equivalent) Sequence is : - autobind() : choose a random local port, insert socket in hash tables [while local address is INADDR_ANY] - connect() : set remote address and port, change local address to IP given by a route lookup. When an incoming UDP frame comes, if more than 10 sockets are found in primary hash table, we switch to secondary table, and fail to find socket because its local address changed. One solution to this problem is to rehash datagram socket if needed. We add a new rehash(struct socket *) method in "struct proto", and implement this method for UDP v4 & v6, using a common helper. This rehashing only takes care of secondary hash table, since primary hash (based on local port only) is not changed. Reported-by: Krzysztof Piotr Oledzki <ole@ans.pl> Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Tested-by: Krzysztof Piotr Oledzki <ole@ans.pl> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-09-08Merge branch 'semaphore-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'semaphore-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: semaphore: Add DEFINE_SEMAPHORE
2010-09-08Merge 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, mcheck: Avoid duplicate sysfs links/files for thresholding banks io-mapping: Fix the address space annotations x86: Fix the address space annotations of iomap_atomic_prot_pfn() x86, mm: Fix CONFIG_VMSPLIT_1G and 2G_OPT trampoline x86, hwmon: Fix unsafe smp_processor_id() in thermal_throttle_add_dev
2010-09-08Merge 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: gcc-4.6: kernel/*: Fix unused but set warnings mutex: Fix annotations to include it in kernel-locking docbook pid: make setpgid() system call use RCU read-side critical section MAINTAINERS: Add RCU's public git tree
2010-09-08ipvs: fix active FTPJulian Anastasov
- Do not create expectation when forwarding the PORT command to avoid blocking the connection. The problem is that nf_conntrack_ftp.c:help() tries to create the same expectation later in POST_ROUTING and drops the packet with "dropping packet" message after failure in nf_ct_expect_related. - Change ip_vs_update_conntrack to alter the conntrack for related connections from real server. If we do not alter the reply in this direction the next packet from client sent to vport 20 comes as NEW connection. We alter it but may be some collision happens for both conntracks and the second conntrack gets destroyed immediately. The connection stucks too. Signed-off-by: Julian Anastasov <ja@ssi.bg> Signed-off-by: Simon Horman <horms@verge.net.au> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-09-08semaphore: Add DEFINE_SEMAPHOREThomas Gleixner
The full cleanup of init_MUTEX[_LOCKED] and DECLARE_MUTEX has not been done. Some of the users are real semaphores and we should name them as such instead of confusing everyone with "MUTEX". Provide the infrastructure to get finally rid of init_MUTEX[_LOCKED] and DECLARE_MUTEX. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Christoph Hellwig <hch@infradead.org> LKML-Reference: <20100907125054.795929962@linutronix.de>
2010-09-07Merge branch 'for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6 * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6: PCI: bus speed strings should be const PCI hotplug: Fix build with CONFIG_ACPI unset PCI: PCIe: Remove the port driver module exit routine PCI: PCIe: Move PCIe PME code to the pcie directory PCI: PCIe: Disable PCIe port services during port initialization PCI: PCIe: Ask BIOS for control of all native services at once ACPI/PCI: Negotiate _OSC control bits before requesting them ACPI/PCI: Do not preserve _OSC control bits returned by a query ACPI/PCI: Make acpi_pci_query_osc() return control bits ACPI/PCI: Reorder checks in acpi_pci_osc_control_set() PCI: PCIe: Introduce commad line switch for disabling port services PCI: PCIe AER: Introduce pci_aer_available() x86/PCI: only define pci_domain_nr if PCI and PCI_DOMAINS are set PCI: provide stub pci_domain_nr function for !CONFIG_PCI configs
2010-09-07Merge branch 'merge' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc * 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc: powerpc/pseries: Correct rtas_data_buf locking in dlpar code powerpc/85xx: Add P1021 PCI IDs and quirks arch/powerpc/sysdev/qe_lib/qe.c: Add of_node_put to avoid memory leak arch/powerpc/platforms/83xx/mpc837x_mds.c: Add missing iounmap fsl_rio: fix compile errors powerpc/85xx: Fix compile issue with p1022_ds due to lmb rename to memblock powerpc/85xx: Fix compilation of mpc85xx_mds.c powerpc: Don't use kernel stack with translation off powerpc/perf_event: Reduce latency of calling perf_event_do_pending powerpc/kexec: Adds correct calling convention for kexec purgatory
2010-09-07Merge branch 'for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu: percpu: fix a mismatch between code and comment percpu: fix a memory leak in pcpu_extend_area_map() percpu: add __percpu notations to UP allocator percpu: handle __percpu notations in UP accessors
2010-09-07Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wqLinus Torvalds
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq: workqueue: use zalloc_cpumask_var() for gcwq->mayday_mask workqueue: fix GCWQ_DISASSOCIATED initialization workqueue: Add a workqueue chapter to the tracepoint docbook workqueue: fix cwq->nr_active underflow workqueue: improve destroy_workqueue() debuggability workqueue: mark lock acquisition on worker_maybe_bind_and_lock() workqueue: annotate lock context change workqueue: free rescuer on destroy_workqueue
2010-09-07Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty-2.6Linus Torvalds
* git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty-2.6: tty: fix tty_line must not be equal to number of allocated tty pointers in tty driver serial: bfin_sport_uart: restore transmit frame sync fix serial: fix port type conflict between NS16550A & U6_16550A MAINTAINERS: orphan isicom vt: Fix console corruption on driver hand-over.
2010-09-07agp/intel: Fix cache control for SandybridgeZhenyu Wang
Sandybridge GTT has new cache control bits in PTE, which controls graphics page cache in LLC or LLC/MLC, so we need to extend the mask function to respect the new bits. And set cache control to always LLC only by default on Gen6. Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com> Cc: stable@kernel.org Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
2010-09-05cgroups: fix API thinkoMichael S. Tsirkin
cgroup_attach_task_current_cg API that have upstream is backwards: we really need an API to attach to the cgroups from another process A to the current one. In our case (vhost), a priveledged user wants to attach it's task to cgroups from a less priveledged one, the API makes us run it in the other task's context, and this fails. So let's make the API generic and just pass in 'from' and 'to' tasks. Add an inline wrapper for cgroup_attach_task_current_cg to avoid breaking bisect. Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Acked-by: Li Zefan <lizf@cn.fujitsu.com> Acked-by: Paul Menage <menage@google.com>
2010-09-05io-mapping: Fix the address space annotationsFrancisco Jerez
Fixes a bunch of sparse warnings in io-mapping.h because of the inconsistent __iomem usage. Signed-off-by: Francisco Jerez <currojerez@riseup.net> LKML-Reference: <1283633804-11749-2-git-send-email-currojerez@riseup.net> Cc: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-09-03serial: fix port type conflict between NS16550A & U6_16550APhilippe Langlais
Bug seen by Dr. David Alan Gilbert with sparse Signed-off-by: Philippe Langlais <philippe.langlais@stericsson.com> Cc: stable <stable@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-09-03cls_cgroup: Fix rcu lockdep warningLi Zefan
Dave reported an rcu lockdep warning on 2.6.35.4 kernel task->cgroups and task->cgroups->subsys[i] are protected by RCU. So we avoid accessing invalid pointers here. This might happen, for example, when you are deref-ing those pointers while someone move @task from one cgroup to another. Reported-by: Dave Jones <davej@redhat.com> Signed-off-by: Li Zefan <lizf@cn.fujitsu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-09-03mutex: Fix annotations to include it in kernel-locking docbookRandy Dunlap
Fix kernel-doc notation in linux/mutex.h and kernel/mutex.c, then add these 2 files to the kernel-locking docbook as the Mutex API reference chapter. Add one API function to mutex-design.txt and correct a typo in that file. Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com> Cc: Rusty Russell <rusty@rustcorp.com.au> LKML-Reference: <20100902154816.6cc2f9ad.randy.dunlap@oracle.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-08-31powerpc/85xx: Add P1021 PCI IDs and quirksAnton Vorontsov
This is needed for proper PCI-E support on P1021 SoCs. Signed-off-by: Anton Vorontsov <avorontsov@mvista.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
2010-08-28Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6Linus Torvalds
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6: net/ipv4: Eliminate kstrdup memory leak net/caif/cfrfml.c: use asm/unaligned.h ax25: missplaced sock_put(sk) qlge: reset the chip before freeing the buffers l2tp: test for ethernet header in l2tp_eth_dev_recv() tcp: select(writefds) don't hang up when a peer close connection tcp: fix three tcp sysctls tuning tcp: Combat per-cpu skew in orphan tests. pxa168_eth: silence gcc warnings pxa168_eth: update call to phy_mii_ioctl() pxa168_eth: fix error handling in prope pxa168_eth: remove unneeded null check phylib: Fix race between returning phydev and calling adjust_link caif-driver: add HAS_DMA dependency 3c59x: Fix deadlock between boomerang_interrupt and boomerang_start_tx qlcnic: fix poll implementation netxen: fix poll implementation bridge: netfilter: fix a memory leak
2010-08-28Merge branch 'for-linus' of git://git.infradead.org/users/eparis/notifyLinus Torvalds
* 'for-linus' of git://git.infradead.org/users/eparis/notify: fsnotify: drop two useless bools in the fnsotify main loop fsnotify: fix list walk order fanotify: Return EPERM when a process is not privileged fanotify: resize pid and reorder structure fanotify: drop duplicate pr_debug statement fanotify: flush outstanding perm requests on group destroy fsnotify: fix ignored mask handling between inode and vfsmount marks fanotify: add MAINTAINERS entry fsnotify: reset used_inode and used_vfsmount on each pass fanotify: do not dereference inode_mark when it is unset
2010-08-28Merge branch 'drm-fixes' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6 * 'drm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6: vgaarb: Wrap vga_(get|put) in CONFIG_VGA_ARB drm/radeon/kms: add missing scratch update in dp_detect drm/modes: Fix CVT-R modeline generation drm: fix regression in drm locking since BKL removal. drm/radeon/kms: remove stray radeon_i2c_destroy drm: mm: fix range restricted allocations drm/nouveau: drop drm_global_mutex before sleeping in submission path drm: export drm_global_mutex for drivers to use drm/nv20: Don't use pushbuf calls on the original nv20. drm/nouveau: Fix TMDS on some DCB1.5 boards. drm/nouveau: Fix backlight control on PPC machines with an internal TMDS panel. drm/nv30: Apply modesetting to the correct slave encoder drm/nouveau: Use a helper function to match PCI device/subsystem IDs. drm/nv50: add dcb type 14 to enum to prevent compiler complaint
2010-08-28NOMMU: Stub out vm_get_page_prot() if there's no MMUDavid Howells
Stub out vm_get_page_prot() if there's no MMU. This was added by commit 804af2cf6e7a ("[AGPGART] remove private page protection map") and is used in commit c07fbfd17e61 ("fbmem: VM_IO set, but not propagated") in the fbmem video driver, but the function doesn't exist on NOMMU, resulting in an undefined symbol at link time. Signed-off-by: David Howells <dhowells@redhat.com> Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-08-28Merge branch 'for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input: Input: pxa27x_keypad - remove input_free_device() in pxa27x_keypad_remove() Input: mousedev - fix regression of inverting axes Input: uinput - add devname alias to allow module on-demand load Input: hil_kbd - fix compile error USB: drop tty argument from usb_serial_handle_sysrq_char() Input: sysrq - drop tty argument form handle_sysrq() Input: sysrq - drop tty argument from sysrq ops handlers
2010-08-27fanotify: resize pid and reorder structureTvrtko Ursulin
resize pid and reorder the fanotify_event_metadata so it is naturally aligned and we can work towards dropping the packed attributed Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@sophos.com> Cc: Andreas Dilger <adilger@dilger.ca> Signed-off-by: Eric Paris <eparis@redhat.com>
2010-08-27vgaarb: Wrap vga_(get|put) in CONFIG_VGA_ARBChris Wilson
Fix link failure without the vga arbitrator. Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Cc: Dave Airlie <airlied@redhat.com> Cc: Jesse Barnes <jbarnes@virtuousgeek.org> Signed-off-by: Dave Airlie <airlied@redhat.com>
2010-08-25tcp: Combat per-cpu skew in orphan tests.David S. Miller
As reported by Anton Blanchard when we use percpu_counter_read_positive() to make our orphan socket limit checks, the check can be off by up to num_cpus_online() * batch (which is 32 by default) which on a 128 cpu machine can be as large as the default orphan limit itself. Fix this by doing the full expensive sum check if the optimized check triggers. Reported-by: Anton Blanchard <anton@samba.org> Signed-off-by: David S. Miller <davem@davemloft.net> Acked-by: Eric Dumazet <eric.dumazet@gmail.com>
2010-08-25workqueue: fix cwq->nr_active underflowTejun Heo
cwq->nr_active is used to keep track of how many work items are active for the cpu workqueue, where 'active' is defined as either pending on global worklist or executing. This is used to implement the max_active limit and workqueue freezing. If a work item is queued after nr_active has already reached max_active, the work item doesn't increment nr_active and is put on the delayed queue and gets activated later as previous active work items retire. try_to_grab_pending() which is used in the cancellation path unconditionally decremented nr_active whether the work item being cancelled is currently active or delayed, so cancelling a delayed work item makes nr_active underflow. This breaks max_active enforcement and triggers BUG_ON() in destroy_workqueue() later on. This patch fixes this bug by adding a flag WORK_STRUCT_DELAYED, which is set while a work item in on the delayed list and making try_to_grab_pending() decrement nr_active iff the work item is currently active. The addition of the flag enlarges cwq alignment to 256 bytes which is getting a bit too large. It's scheduled to be reduced back to 128 bytes by merging WORK_STRUCT_PENDING and WORK_STRUCT_CWQ in the next devel cycle. Signed-off-by: Tejun Heo <tj@kernel.org> Reported-by: Johannes Berg <johannes@sipsolutions.net>
2010-08-24ACPI/PCI: Negotiate _OSC control bits before requesting them Rafael J. Wysocki
It is possible that the BIOS will not grant control of all _OSC features requested via acpi_pci_osc_control_set(), so it is recommended to negotiate the final set of _OSC features with the query flag set before calling _OSC to request control of these features. To implement it, rework acpi_pci_osc_control_set() so that the caller can specify the mask of _OSC control bits to negotiate and the mask of _OSC control bits that are absolutely necessary to it. Then, acpi_pci_osc_control_set() will run _OSC queries in a loop until the mask of _OSC control bits returned by the BIOS is equal to the mask passed to it. Also, before running the _OSC request acpi_pci_osc_control_set() will check if the caller's required control bits are present in the final mask. Using this mechanism we will be able to avoid situations in which the BIOS doesn't grant control of certain _OSC features, because they depend on some other _OSC features that have not been requested. Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2010-08-24ACPI/PCI: Do not preserve _OSC control bits returned by a query Rafael J. Wysocki
There is the assumption in acpi_pci_osc_control_set() that it is always sufficient to compare the mask of _OSC control bits to be requested with the result of an _OSC query where all of the known control bits have been checked. However, in general, that need not be the case. For example, if an _OSC feature A depends on an _OSC feature B and control of A, B plus another _OSC feature C is requested simultaneously, the BIOS may return A, B, C, while it would only return C if A and C were requested without B. That may result in passing a wrong mask of _OSC control bits to an _OSC control request, in which case the BIOS may only grant control of a subset of the requested features. Moreover, acpi_pci_run_osc() will return error code if that happens and the caller of acpi_pci_osc_control_set() will not know that it's been granted control of some _OSC features. Consequently, the system will generally not work as expected. Apart from this acpi_pci_osc_control_set() always uses the mask of _OSC control bits returned by the very first invocation of acpi_pci_query_osc(), but that is done with the second argument equal to OSC_PCI_SEGMENT_GROUPS_SUPPORT which generally happens to affect the returned _OSC control bits. For these reasons, make acpi_pci_osc_control_set() always check if control of the requested _OSC features will be granted before making the final control request. As a result, the osc_control_qry and osc_queried members of struct acpi_pci_root are not necessary any more, so drop them and remove the remaining code referring to them. Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2010-08-24Merge branch 'perf-fixes-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'perf-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: watchdog: Don't throttle the watchdog tracing: Fix timer tracing
2010-08-24guard page for stacks that grow upwardsLuck, Tony
pa-risc and ia64 have stacks that grow upwards. Check that they do not run into other mappings. By making VM_GROWSUP 0x0 on architectures that do not ever use it, we can avoid some unpleasant #ifdefs in check_stack_guard_page(). Signed-off-by: Tony Luck <tony.luck@intel.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-08-24workqueue: improve destroy_workqueue() debuggabilityTejun Heo
Now that the worklist is global, having works pending after wq destruction can easily lead to oops and destroy_workqueue() have several BUG_ON()s to catch these cases. Unfortunately, BUG_ON() doesn't tell much about how the work became pending after the final flush_workqueue(). This patch adds WQ_DYING which is set before the final flush begins. If a work is requested to be queued on a dying workqueue, WARN_ON_ONCE() is triggered and the request is ignored. This clearly indicates which caller is trying to queue a work on a dying workqueue and keeps the system working in most cases. Locking rule comment is updated such that the 'I' rule includes modifying the field from destruction path. Signed-off-by: Tejun Heo <tj@kernel.org>