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2010-07-04module: initialize module dynamic debug laterYehuda Sadeh1-2/+2
We should initialize the module dynamic debug datastructures only after determining that the module is not loaded yet. This fixes a bug that introduced in 2.6.35-rc2, where when a trying to load a module twice, we also load it's dynamic printing data twice which causes all sorts of nasty issues. Also handle the dynamic debug cleanup later on failure. Signed-off-by: Yehuda Sadeh <yehuda@hq.newdream.net> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> (removed a #ifdef) Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-07-02Merge branch 'sched-fixes-for-linus' of ↵Linus Torvalds1-1/+1
git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'sched-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: sched: Cure nr_iowait_cpu() users init: Fix comment init, sched: Fix race between init and kthreadd
2010-07-01Merge branch 'upstream-linus' of ↵Linus Torvalds1-0/+1
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: ata_generic: implement ATA_GEN_* flags and force enable DMA on MBP 7,1 ahci,ata_generic: let ata_generic handle new MBP w/ MCP89 libahci: Fix bug in storing EM messages
2010-07-01ahci,ata_generic: let ata_generic handle new MBP w/ MCP89Tejun Heo1-0/+1
For yet unknown reason, MCP89 on MBP 7,1 doesn't work w/ ahci under linux but the controller doesn't require explicit mode setting and works fine with ata_generic. Make ahci ignore the controller on MBP 7,1 and let ata_generic take it for now. Reported in bko#15923. https://bugzilla.kernel.org/show_bug.cgi?id=15923 NVIDIA is investigating why ahci mode doesn't work. Signed-off-by: Tejun Heo <tj@kernel.org> Cc: Peer Chen <pchen@nvidia.com> Cc: stable@kernel.org Reported-by: Anders Østhus <grapz666@gmail.com> Reported-by: Andreas Graf <andreas_graf@csgraf.de> Reported-by: Benoit Gschwind <gschwind@gnu-log.net> Reported-by: Damien Cassou <damien.cassou@gmail.com> Reported-by: tixetsal@juno.com Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
2010-07-01Merge branch 'drm-fixes' of ↵Linus Torvalds2-3/+2
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: (27 commits) drm/radeon/kms: remove rv100 bios connector quirk drm/radeon/kms/pm: fix power state indexing on igp chips in dynpm mode DRM / radeon / KMS: Fix hibernation regression related to radeon PM (was: Re: [Regression, post-2.6.34] Hibernation broken on machines with radeon/KMS and r300) drm/radeon/kms/igp: fix possible divide by 0 in bandwidth code (v2) drm/radeon: add quirk to make HP nx6125 laptop resume. drm/radeon/kms: add some missing regs to evergreen gpu init drm/radeon/kms: fix typos in evergreen command checker drm/radeon/kms: avoid oops on mac r4xx cards fb: fix colliding defines for fb flags. drm/radeon/kms: Force HDP_NONSURF to maximum size drm/radeon/kms: disable frac fb dividers for rs6xx drm/radeon/kms: don't read attempt to read bios from VRAM on unposted GPU. drm/radeon/kms: fix typo in evergreen_gpu_init drm/radeon/kms: return ret in cursor_set failure path drm/ttm: non pooled page allocation should have GFP_USER set drm/radeon/r100/r200: fix calculation of compressed cube maps drm/radeon/r200: handle more hw tex coord types drm/radeon/kms: CS checker texture fixes for r1xx/r2xx/r3xx drm/radeon: add fake RN50 table for powerpc drm/fb: Fix video= mode computation ...
2010-07-01sched: Cure nr_iowait_cpu() usersPeter Zijlstra1-1/+1
Commit 0224cf4c5e (sched: Intoduce get_cpu_iowait_time_us()) broke things by not making sure preemption was indeed disabled by the callers of nr_iowait_cpu() which took the iowait value of the current cpu. This resulted in a heap of preempt warnings. Cure this by making nr_iowait_cpu() take a cpu number and fix up the callers to pass in the right number. Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Arjan van de Ven <arjan@infradead.org> Cc: Sergey Senozhatsky <sergey.senozhatsky@gmail.com> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Maxim Levitsky <maximlevitsky@gmail.com> Cc: Len Brown <len.brown@intel.com> Cc: Pavel Machek <pavel@ucw.cz> Cc: Jiri Slaby <jslaby@suse.cz> Cc: linux-pm@lists.linux-foundation.org LKML-Reference: <1277968037.1868.120.camel@laptop> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-07-01fb: fix colliding defines for fb flags.Dave Airlie1-2/+2
When I added the flags I must have been using a 25 line terminal and missed the following flags. The collided with flag has one user in staging despite being in-tree for 5 years. I'm happy to push this via my drm tree unless someone really wants to do it. Signed-off-by: Dave Airlie <airlied@redhat.com> Cc: stable@kernel.org
2010-06-29compiler-gcc.h: gcc-4.5 needs noclone and noinline on __naked functionsMikael Pettersson2-1/+13
A __naked function is defined in C but with a body completely implemented by asm(), including any prologue and epilogue. These asm() bodies expect standard calling conventions for parameter passing. Older GCCs implement that correctly, but 4.[56] currently do not, see GCC PR44290. In the Linux kernel this breaks ARM, causing most arch/arm/mm/copypage-*.c modules to get miscompiled, resulting in kernel crashes during bootup. Part of the kernel fix is to augment the __naked function attribute to also imply noinline and noclone. This patch implements that, and has been verified to fix boot failures with gcc-4.5 compiled 2.6.34 and 2.6.35-rc1 kernels. The patch is a no-op with older GCCs. Signed-off-by: Mikael Pettersson <mikpe@it.uu.se> Signed-off-by: Khem Raj <raj.khem@gmail.com> Cc: Russell King <rmk@arm.linux.org.uk> Cc: <stable@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-06-29Merge branch 'for-linus' of git://git.kernel.dk/linux-2.6-blockLinus Torvalds2-3/+3
* 'for-linus' of git://git.kernel.dk/linux-2.6-block: block: Don't count_vm_events for discard bio in submit_bio. cfq: fix recursive call in cfq_blkiocg_update_completion_stats() cfq-iosched: Fixed boot warning with BLK_CGROUP=y and CFQ_GROUP_IOSCHED=n cfq: Don't allow queue merges for queues that have no process references block: fix DISCARD_BARRIER requests cciss: set SCSI max cmd len to 16, as default is wrong cpqarray: fix two more wrong section type cpqarray: fix wrong __init type on pci probe function drbd: Fixed a race between disk-attach and unexpected state changes writeback: fix pin_sb_for_writeback writeback: add missing requeue_io in writeback_inodes_wb writeback: simplify and split bdi_start_writeback writeback: simplify wakeup_flusher_threads writeback: fix writeback_inodes_wb from writeback_inodes_sb writeback: enforce s_umount locking in writeback_inodes_sb writeback: queue work on stack in writeback_inodes_sb writeback: fix writeback completion notifications
2010-06-29fs: fix superblock iteration racenpiggin@suse.de1-0/+15
list_for_each_entry_safe is not suitable to protect against concurrent modification of the list. 6754af6 introduced a race in sb walking. list_for_each_entry can use the trick of pinning the current entry in the list before we drop and retake the lock because it subsequently follows cur->next. However list_for_each_entry_safe saves n=cur->next for following before entering the loop body, so when the lock is dropped, n may be deleted. Signed-off-by: Nick Piggin <npiggin@suse.de> Cc: Christoph Hellwig <hch@infradead.org> Cc: John Stultz <johnstul@us.ibm.com> Cc: Frank Mayhar <fmayhar@google.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-06-28Merge branch 'perf-fixes-for-linus' of ↵Linus Torvalds1-0/+1
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: tracing: Fix undeclared ENOSYS in include/linux/tracepoint.h perf record: prevent kill(0, SIGTERM); perf session: Remove threads from tree on PERF_RECORD_EXIT perf/tracing: Fix regression of perf losing kprobe events perf_events: Fix Intel Westmere event constraints perf record: Don't call newt functions when not initialized
2010-06-28Merge branch 'sched-fixes-for-linus' of ↵Linus Torvalds1-6/+14
git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'sched-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: sched: Prevent compiler from optimising the sched_avg_update() loop sched: Fix over-scheduling bug sched: Fix PROVE_RCU vs cpu_cgroup
2010-06-27Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6Linus Torvalds1-1/+1
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6: (52 commits) phylib: Add autoload support for the LXT973 phy. ISDN: hysdn, fix potential NULL dereference vxge: fix memory leak in vxge_alloc_msix() error path isdn/gigaset: correct CAPI connection state storage isdn/gigaset: encode HLC and BC together isdn/gigaset: correct CAPI DATA_B3 Delivery Confirmation isdn/gigaset: correct CAPI voice connection encoding isdn/gigaset: honor CAPI application's buffer size request cpmac: do not leak struct net_device on phy_connect errors smc91c92_cs: fix the problem that lan & modem does not work simultaneously ipv6: fix NULL reference in proxy neighbor discovery Bluetooth: Bring back var 'i' increment xfrm: check bundle policy existance before dereferencing it sky2: enable rx/tx in sky2_phy_reinit() cnic: Disable statistics initialization for eth clients that do not support statistics net: add dependency on fw class module to qlcnic and netxen_nic snmp: fix SNMP_ADD_STATS() hso: remove setting of low_latency flag udp: Fix bogus UFO packet generation lasi82596: fix netdev_mc_count conversion ...
2010-06-23snmp: fix SNMP_ADD_STATS()Eric Dumazet1-1/+1
commit aa2ea0586d9d (tcp: fix outsegs stat for TSO segments) incorrectly assumed SNMP_ADD_STATS() was used from BH context. Fix this using mib[!in_softirq()] instead of mib[0] Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> CC: Tom Herbert <therbert@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-06-21tracing: Fix undeclared ENOSYS in include/linux/tracepoint.hWu Zhangjin1-0/+1
The header file include/linux/tracepoint.h may be included without include/linux/errno.h and then the compiler will fail on building for undelcared ENOSYS. This patch fixes this problem via including <linux/errno.h> to include/linux/tracepoint.h. Signed-off-by: Wu Zhangjin <wuzhangjin@gmail.com> LKML-Reference: <1277118549-622-1-git-send-email-wuzhangjin@gmail.com> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
2010-06-15agp: drop vmalloc flag.Dave Airlie1-1/+0
Since the code that was too ugly to live is upstream, we can use it now, instead of rolling our own. Signed-off-by: Dave Airlie <airlied@redhat.com>
2010-06-14Merge branch 'for-jens' of git://git.drbd.org/linux-2.6-drbd into for-linusJens Axboe2-2/+5
2010-06-14drbd: Fixed a race between disk-attach and unexpected state changesPhilipp Reisner1-1/+1
This was a very hard to trigger race condition. If we got a state packet from the peer, after drbd_nl_disk() has already changed the disk state to D_NEGOTIATING but after_state_ch() was not yet run by the worker, then receive_state() might called drbd_sync_handshake(), which in turn crashed when accessing p_uuid. Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com> Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
2010-06-12Merge branch 'bugzilla-13931-sleep-nvs' into releaseLen Brown1-13/+13
Conflicts: drivers/acpi/sleep.c Signed-off-by: Len Brown <len.brown@intel.com>
2010-06-12Merge branch 'acpica-cherry-pick' into releaseLen Brown2-1/+2
2010-06-12ACPICA: Truncate I/O addresses to 16 bits for Windows compatibilityMatthew Garrett1-0/+1
This feature is optional and is enabled if the BIOS requests any Windows OSI strings. It can also be enabled by the host OS. Signed-off-by: Matthew Garrett <mjg@redhat.com> Signed-off-by: Bob Moore <robert.moore@intel.com> Signed-off-by: Lin Ming <ming.m.lin@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
2010-06-12ACPICA: Fix namestring associated with AE_NO_HANDLER exceptionBob Moore1-1/+1
Was incorrectly AE_WAKE_ONLY_GPE. Signed-off-by: Bob Moore <robert.moore@intel.com> Signed-off-by: Lin Ming <ming.m.lin@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
2010-06-12Merge branch 'gpe-regression-fixes' into releaseLen Brown1-1/+2
2010-06-12ACPI / ACPICA: Avoid writing full enable masks to GPE registersRafael J. Wysocki1-0/+1
ACPICA uses acpi_hw_write_gpe_enable_reg() to re-enable a GPE after an event signaled by it has been handled. However, this function writes the entire GPE enable mask to the GPE's enable register which may not be correct. Namely, if one of the other GPEs in the same register was previously enabled by acpi_enable_gpe() and subsequently disabled using acpi_set_gpe(), acpi_hw_write_gpe_enable_reg() will re-enable it along with the target GPE. To fix this issue rework acpi_hw_write_gpe_enable_reg() so that it calls acpi_hw_low_set_gpe() with a special action value, ACPI_GPE_COND_ENABLE, that will make it only enable the GPE if the corresponding bit in its register's enable_for_run mask is set. Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Signed-off-by: Len Brown <len.brown@intel.com>
2010-06-12ACPI / ACPICA: Fix low-level GPE manipulation codeRafael J. Wysocki1-1/+1
ACPICA uses acpi_ev_enable_gpe() for enabling GPEs at the low level, which is incorrect, because this function only enables the GPE if the corresponding bit in its enable register's enable_for_run mask is set. This causes acpi_set_gpe() to work incorrectly if used for enabling GPEs that were not previously enabled with acpi_enable_gpe(). As a result, among other things, wakeup-only GPEs are never enabled by acpi_enable_wakeup_device(), so the devices that use them are unable to wake up the system. To fix this issue remove acpi_ev_enable_gpe() and its counterpart acpi_ev_disable_gpe() and replace acpi_hw_low_disable_gpe() with acpi_hw_low_set_gpe() that will be used instead to manipulate GPE enable bits at the low level. Make the users of acpi_ev_enable_gpe() and acpi_ev_disable_gpe() call acpi_hw_low_set_gpe() instead and make sure that GPE enable masks are only updated by acpi_enable_gpe() and acpi_disable_gpe() when GPE reference counters change from 0 to 1 and from 1 to 0, respectively. Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Signed-off-by: Len Brown <len.brown@intel.com>
2010-06-11Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6Linus Torvalds1-1/+4
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6: wimax/i2400m: fix missing endian correction read in fw loader net8139: fix a race at the end of NAPI pktgen: Fix accuracy of inter-packet delay. pkt_sched: gen_estimator: add a new lock net: deliver skbs on inactive slaves to exact matches ipv6: fix ICMP6_MIB_OUTERRORS r8169: fix mdio_read and update mdio_write according to hw specs gianfar: Revive the driver for eTSEC devices (disable timestamping) caif: fix a couple range checks phylib: Add support for the LXT973 phy. net: Print num_rx_queues imbalance warning only when there are allocated queues
2010-06-11writeback: simplify and split bdi_start_writebackChristoph Hellwig1-2/+2
bdi_start_writeback now never gets a superblock passed, so we can just remove that case. And to further untangle the code and flatten the call stack split it into two trivial helpers for it's two callers. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
2010-06-10net: deliver skbs on inactive slaves to exact matchesJohn Fastabend1-1/+4
Currently, the accelerated receive path for VLAN's will drop packets if the real device is an inactive slave and is not one of the special pkts tested for in skb_bond_should_drop(). This behavior is different then the non-accelerated path and for pkts over a bonded vlan. For example, vlanx -> bond0 -> ethx will be dropped in the vlan path and not delivered to any packet handlers at all. However, bond0 -> vlanx -> ethx and bond0 -> ethx will be delivered to handlers that match the exact dev, because the VLAN path checks the real_dev which is not a slave and netif_recv_skb() doesn't drop frames but only delivers them to exact matches. This patch adds a sk_buff flag which is used for tagging skbs that would previously been dropped and allows the skb to continue to skb_netif_recv(). Here we add logic to check for the deliver_no_wcard flag and if it is set only deliver to handlers that match exactly. This makes both paths above consistent and gives pkt handlers a way to identify skbs that come from inactive slaves. Without this patch in some configurations skbs will be delivered to handlers with exact matches and in others be dropped out right in the vlan path. I have tested the following 4 configurations in failover modes and load balancing modes. # bond0 -> ethx # vlanx -> bond0 -> ethx # bond0 -> vlanx -> ethx # bond0 -> ethx | vlanx -> -- Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-06-10Merge branch 'perf-fixes-for-linus' of ↵Linus Torvalds1-1/+2
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: tracing: Fix null pointer deref with SEND_SIG_FORCED perf: Fix signed comparison in perf_adjust_period() powerpc/oprofile: fix potential buffer overrun in op_model_cell.c perf symbols: Set the DSO long name when using symbol_conf.vmlinux_name
2010-06-10suspend: Move NVS save/restore code to generic suspend functionalityMatthew Garrett1-13/+13
Saving platform non-volatile state may be required for suspend to RAM as well as hibernation. Move it to more generic code. Signed-off-by: Matthew Garrett <mjg@redhat.com> Acked-by: Rafael J. Wysocki <rjw@sisk.pl> Tested-by: Maxim Levitsky <maximlevitsky@gmail.com> Signed-off-by: Len Brown <len.brown@intel.com>
2010-06-09misc: Fix allocation 'borrowed' by vhost_netAlan Cox1-1/+6
10, 233 is allocated officially to /dev/kmview which is shipping in Ubuntu and Debian distributions. vhost_net seem to have borrowed it without making a proper request and this causes regressions in the other distributions. vhost_net can use a dynamic minor so use that instead. Also update the file with a comment to try and avoid future misunderstandings. cc: stable@kernel.org Signed-off-by: Alan Cox <device@lanana.org> [ We should have caught this before 2.6.34 got released. - Linus ] Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-06-08Merge branch 'drm-fixes' of ↵Linus Torvalds1-0/+1
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: (23 commits) drm/radeon: don't poll tv dac if crtc2 is in use. drm/radeon: reset i2c valid to avoid incorrect tv-out polling. drm/nv50: fix iommu errors caused by device reading from address 0 drm/nouveau: off by one in init_i2c_device_find() nouveau: off by one in nv50_gpio_location() drm/nouveau: completely fail init if we fail to map the PRAMIN BAR drm/nouveau: match U/DP script against SOR link drm/radeon/kms/pm: resurrect printing power states drm/radeon/kms: add trivial debugging for voltage drm/radeon/kms/r600+: use voltage from requested clock mode (v3) drm/radeon/kms/pm: track current voltage (v2) drm/radeon/kms/pm: Disable voltage adjust on RS780/RS880 drm/radeon/kms: fix typo in printing the HPD info drm/radeon/kms/pm: add mid profile drm/radeon/kms/pm: Misc fixes drm/radeon/kms/combios: fix typo in voltage fix drm/radeon/kms/evergreen: set accel_enabled drm/vmwgfx: return -EFAULT for copy_to_user errors drm/drm_crtc: return -EFAULT on copy_to_user errors drm/fb: use printk to print out the switching to text mode error. ...
2010-06-08writeback: pay attention to wbc->nr_to_write in write_cache_pagesDave Chinner2-13/+1
If a filesystem writes more than one page in ->writepage, write_cache_pages fails to notice this and continues to attempt writeback when wbc->nr_to_write has gone negative - this trace was captured from XFS: wbc_writeback_start: towrt=1024 wbc_writepage: towrt=1024 wbc_writepage: towrt=0 wbc_writepage: towrt=-1 wbc_writepage: towrt=-5 wbc_writepage: towrt=-21 wbc_writepage: towrt=-85 This has adverse effects on filesystem writeback behaviour. write_cache_pages() needs to terminate after a certain number of pages are written, not after a certain number of calls to ->writepage are made. This is a regression introduced by 17bc6c30cf6bfffd816bdc53682dd46fc34a2cf4 ("vfs: Add no_nrwrite_index_update writeback control flag"), but cannot be reverted directly due to subsequent bug fixes that have gone in on top of it. Signed-off-by: Dave Chinner <dchinner@redhat.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-06-08tracing: Fix null pointer deref with SEND_SIG_FORCEDOleg Nesterov1-1/+2
BUG: unable to handle kernel NULL pointer dereference at 0000000000000006 IP: [<ffffffff8107bd37>] ftrace_raw_event_signal_generate+0x87/0x140 TP_STORE_SIGINFO() forgets about SEND_SIG_FORCED, fix. We should probably export is_si_special() and change TP_STORE_SIGINFO() to use it in the longer term. Signed-off-by: Oleg Nesterov <oleg@redhat.com> Acked-by: Roland McGrath <roland@redhat.com> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Jason Baron <jbaron@redhat.com> Cc: Masami Hiramatsu <mhiramat@redhat.com> Cc: 2.6.33.x-2.6.34.x <stable@kernel.org> LKML-Reference: <20100603213409.GA8307@redhat.com> Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
2010-06-08sched: Fix PROVE_RCU vs cpu_cgroupPeter Zijlstra1-6/+14
PROVE_RCU has a few issues with the cpu_cgroup because the scheduler typically holds rq->lock around the css rcu derefs but the generic cgroup code doesn't (and can't) know about that lock. Provide means to add extra checks to the css dereference and use that in the scheduler to annotate its users. The addition of rq->lock to these checks is correct because the cgroup_subsys::attach() method takes the rq->lock for each task it moves, therefore by holding that lock, we ensure the task is pinned to the current cgroup and the RCU derefence is valid. That leaves one genuine race in __sched_setscheduler() where we used task_group() without holding any of the required locks and thus raced with the cgroup code. Solve this by moving the check under the appropriate lock. Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> LKML-Reference: <new-submission> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-06-08drm/radeon/kms/evergreen: set accel_enabledAlex Deucher1-0/+1
This is needed to enable accel in the ddx. However, due to a bug in older versions of the ddx, it relies on accel being disabled in order to load properly on evergreen chips. To maintain compatility, we add a new get accel param and call that from the ddx. The old one always returns false for evergreen cards. [this fixes a regression with older userspaces on newer kernels]. Signed-off-by: Alex Deucher <alexdeucher@gmail.com> Signed-off-by: Dave Airlie <airlied@redhat.com>
2010-06-07ahci: add pci quirk for JMB362Tejun Heo1-0/+1
JMB362 is a new variant of jmicron controller which is similar to JMB360 but has two SATA ports instead of one. As there is no PATA port, single function AHCI mode can be used as in JMB360. Add pci quirk for JMB362. Signed-off-by: Tejun Heo <tj@kernel.org> Reported-by: Aries Lee <arieslee@jmicron.com> Cc: stable@kernel.org Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
2010-06-05Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6Linus Torvalds1-3/+3
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6: (30 commits) X25: remove duplicated #include tcp: use correct net ns in cookie_v4_check() rps: tcp: fix rps_sock_flow_table table updates ppp_generic: fix multilink fragment sizes syncookies: remove Kconfig text line about disabled-by-default ixgbe: only check pfc bits in hang logic if pfc is enabled net: check for refcount if pop a stacked dst_entry ixgbe: return IXGBE_ERR_RAR_INDEX when out of range act_pedit: access skb->data safely sfc: Store port number in net_device::dev_id epic100: Test __BIG_ENDIAN instead of (non-existent) CONFIG_BIG_ENDIAN tehuti: return -EFAULT on copy_to_user errors isdn/kcapi: return -EFAULT on copy_from_user errors e1000e: change logical negate to bitwise sfc: Get port number from CS_PORT_NUM, not PCI function number cls_u32: use skb_header_pointer() to dereference data safely TCP: tcp_hybla: Fix integer overflow in slow start increment act_nat: fix the wrong checksum when addr isn't in old_addr/mask net/fec: fix pm to survive to suspend/resume korina: count RX DMA OVR as rx_fifo_error ...
2010-06-04Merge branch 'for-linus' of ↵Linus Torvalds1-1/+1
git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6 * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6: Minix: Clean up left over label fix truncate inode time modification breakage fix setattr error handling in sysfs, configfs fcntl: return -EFAULT if copy_to_user fails wrong type for 'magic' argument in simple_fill_super() fix the deadlock in qib_fs mqueue doesn't need make_bad_inode()
2010-06-04Merge git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-for-linusLinus Torvalds1-34/+10
* git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-for-linus: module: fix bne2 "gave up waiting for init of module libcrc32c" module: verify_export_symbols under the lock module: move find_module check to end module: make locking more fine-grained. module: Make module sysfs functions private. module: move sysfs exposure to end of load_module module: fix kdb's illicit use of struct module_use. module: Make the 'usage' lists be two-way
2010-06-05module: Make module sysfs functions private.Rusty Russell1-33/+0
These were placed in the header in ef665c1a06 to get the various SYSFS/MODULE config combintations to compile. That may have been necessary then, but it's not now. These functions are all local to module.c. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Cc: Randy Dunlap <randy.dunlap@oracle.com>
2010-06-05module: fix kdb's illicit use of struct module_use.Rusty Russell1-0/+7
Linus changed the structure, and luckily this didn't compile any more. Reported-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Cc: Jason Wessel <jason.wessel@windriver.com> Cc: Martin Hicks <mort@sgi.com>
2010-06-05module: Make the 'usage' lists be two-wayLinus Torvalds1-1/+3
When adding a module that depends on another one, we used to create a one-way list of "modules_which_use_me", so that module unloading could see who needs a module. It's actually quite simple to make that list go both ways: so that we not only can see "who uses me", but also see a list of modules that are "used by me". In fact, we always wanted that list in "module_unload_free()": when we unload a module, we want to also release all the other modules that are used by that module. But because we didn't have that list, we used to first iterate over all modules, and then iterate over each "used by me" list of that module. By making the list two-way, we simplify module_unload_free(), and it allows for some trivial fixes later too. Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> (cleaned & rebased)
2010-06-04net: check for refcount if pop a stacked dst_entrySteffen Klassert1-3/+3
xfrm triggers a warning if dst_pop() drops a refcount on a noref dst. This patch changes dst_pop() to skb_dst_pop(). skb_dst_pop() drops the refcnt only on a refcounted dst. Also we don't clone the child dst_entry, so it is not refcounted and we can use skb_dst_set_noref() in xfrm_output_one(). Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com> Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-06-04Merge git://git.kernel.org/pub/scm/linux/kernel/git/lethal/sh-2.6Linus Torvalds2-3/+162
* git://git.kernel.org/pub/scm/linux/kernel/git/lethal/sh-2.6: (23 commits) sh: Make intc messages consistent via pr_fmt. sh: make sure static declaration on ms7724se sh: make sure static declaration on mach-migor sh: make sure static declaration on mach-ecovec24 sh: make sure static declaration on mach-ap325rxa clocksource: sh_cmt: compute mult and shift before registration clocksource: sh_tmu: compute mult and shift before registration sh: PIO disabling for x3proto and urquell. sh: mach-sdk7786: conditionally disable PIO support. sh: support for platforms without PIO. usb: r8a66597-hcd pio to mmio accessor conversion. usb: gadget: r8a66597-udc pio to mmio accessor conversion. usb: gadget: m66592-udc pio to mmio accessor conversion. sh: add romImage MMCIF boot for sh7724 and Ecovec V2 sh: add boot code to MMCIF driver header sh: prepare MMCIF driver header file sh: allow romImage data between head.S and the zero page sh: Add support MMCIF for ecovec sh: remove duplicated #include input: serio: disable i8042 for non-cayman sh platforms. ...
2010-06-04Merge branch 'linux_next' of ↵Linus Torvalds3-0/+84
git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/i7core * 'linux_next' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/i7core: (83 commits) i7core_edac: Better describe the supported devices Add support for Westmere to i7core_edac driver i7core_edac: don't free on success i7core_edac: Add support for X5670 Always call i7core_[ur]dimm_check_mc_ecc_err i7core_edac: fix memory leak of i7core_dev EDAC: add __init to i7core_xeon_pci_fixup i7core_edac: Fix wrong device id for channel 1 devices i7core: add support for Lynnfield alternate address i7core_edac: Add initial support for Lynnfield i7core_edac: do not export static functions edac: fix i7core build edac: i7core_edac produces undefined behaviour on 32bit i7core_edac: Use a more generic approach for probing PCI devices i7core_edac: PCI device is called NONCORE, instead of NOCORE i7core_edac: Fix ringbuffer maxsize i7core_edac: First store, then increment i7core_edac: Better parse "any" addrmask i7core_edac: Use a lockless ringbuffer edac: Create an unique instance for each kobj ...
2010-06-04Merge branch 'v4l_for_2.6.35' of ↵Linus Torvalds4-3/+25
git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-2.6 * 'v4l_for_2.6.35' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-2.6: (87 commits) V4L/DVB: ivtv: Timing tweaks and code re-order to try and improve stability V4L/DVB: ivtv: Avoid accidental video standard change V4L/DVB: ivtvfb : Module load / unload fixes V4L/DVB: cx2341x: Report correct temporal setting for log-status V4L/DVB: cx18, cx23885, v4l2 doc, MAINTAINERS: Update Andy Walls' email address V4L/DVB: drivers/media: Eliminate a NULL pointer dereference V4L/DVB: dvb-core: Fix ULE decapsulation bug V4L/DVB: Bug fix: make IR work again for dm1105 V4L/DVB: media/IR: nec-decoder needs to select BITREV V4L/DVB: video/saa7134: change dprintk() to i2cdprintk() V4L/DVB: video/saa7134: remove duplicate break V4L/DVB: IR/imon: add auto-config for 0xffdc rf device V4L/DVB: IR/imon: clean up usage of bools V4L/DVB: em28xx: remove unneeded null checks V4L/DVB: ngene: remove unused #include <linux/version.h> V4L/DVB: ak881x needs slab.h V4L/DVB: FusionHDTV: Use quick reads for I2C IR device probing V4L/DVB: Technotrend S2-3200 ships with a TT 1500 remote V4L/DVB: drivers/media: Use kzalloc V4L/DVB: m920x: Select simple tuner ...
2010-06-04Merge branch 'for-linus' of git://git.kernel.dk/linux-2.6-blockLinus Torvalds6-14/+14
* 'for-linus' of git://git.kernel.dk/linux-2.6-block: (27 commits) block: make blk_init_free_list and elevator_init idempotent block: avoid unconditionally freeing previously allocated request_queue pipe: change /proc/sys/fs/pipe-max-pages to byte sized interface pipe: change the privilege required for growing a pipe beyond system max pipe: adjust minimum pipe size to 1 page block: disable preemption before using sched_clock() cciss: call BUG() earlier Preparing 8.3.8rc2 drbd: Reduce verbosity drbd: use drbd specific ratelimit instead of global printk_ratelimit drbd: fix hang on local read errors while disconnected drbd: Removed the now empty w_io_error() function drbd: removed duplicated #includes drbd: improve usage of MSG_MORE drbd: need to set socket bufsize early to take effect drbd: improve network latency, TCP_QUICKACK drbd: Revert "drbd: Create new current UUID as late as possible" brd: support discard Revert "writeback: fix WB_SYNC_NONE writeback from umount" Revert "writeback: ensure that WB_SYNC_NONE writeback with sb pinned is sync" ...
2010-06-04sys_personality: change sys_personality() to accept "unsigned int" instead ↵Oleg Nesterov2-2/+2
of u_long task_struct->pesonality is "unsigned int", but sys_personality() paths use "unsigned long pesonality". This means that every assignment or comparison is not right. In particular, if this argument does not fit into "unsigned int" __set_personality() changes the caller's personality and then sys_personality() returns -EINVAL. Turn this argument into "unsigned int" and avoid overflows. Obviously, this is the user-visible change, we just ignore the upper bits. But this can't break the sane application. There is another thing which can confuse the poorly written applications. User-space thinks that this syscall returns int, not long. This means that the returned value can be negative and look like the error code. But note that libc won't be confused and thus errno won't be set, and with this patch the user-space can never get -1 unless sys_personality() really fails. And, most importantly, the negative RET != -1 is only possible if that app previously called personality(RET). Pointed-out-by: Wenming Zhang <wezhang@redhat.com> Suggested-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Oleg Nesterov <oleg@redhat.com> Cc: "H. Peter Anvin" <hpa@zytor.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-06-04wrong type for 'magic' argument in simple_fill_super()Roberto Sassu1-1/+1
It's used to superblock ->s_magic, which is unsigned long. Signed-off-by: Roberto Sassu <roberto.sassu@polito.it> Reviewed-by: Mimi Zohar <zohar@us.ibm.com> Signed-off-by: Eric Paris <eparis@redhat.com> CC: stable@kernel.org Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>