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2010-11-22Merge branches 'upstream/core', 'upstream/xenfs' and 'upstream/evtchn' into upstream/for-linusJeremy Fitzhardinge84-607/+1455
* upstream/core: xen/events: Use PIRQ instead of GSI value when unmapping MSI/MSI-X irqs. xen: set IO permission early (before early_cpu_init()) xen: re-enable boot-time ballooning xen/balloon: make sure we only include remaining extra ram xen/balloon: the balloon_lock is useless xen: add extra pages to balloon xen/events: use locked set|clear_bit() for cpu_evtchn_mask xen/evtchn: clear secondary CPUs' cpu_evtchn_mask[] after restore xen: implement XENMEM_machphys_mapping * upstream/xenfs: Revert "xen/privcmd: create address space to allow writable mmaps" xen/xenfs: update xenfs_mount for new prototype xen: fix header export to userspace xen: set vma flag VM_PFNMAP in the privcmd mmap file_op xen: xenfs: privcmd: check put_user() return code * upstream/evtchn: xen: make evtchn's name less generic xen/evtchn: the evtchn device is non-seekable xen/evtchn: add missing static xen/evtchn: Fix name of Xen event-channel device xen/evtchn: don't do unbind_from_irqhandler under spinlock xen/evtchn: remove spurious barrier xen/evtchn: ports start enabled xen/evtchn: dynamically allocate port_user array xen/evtchn: track enabled state for each port
2010-11-19xen: add extra pages to balloonJeremy Fitzhardinge1-0/+7
Add extra pages in the pseudo-physical address space to the balloon so we can extend into them later. Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
2010-11-16Merge commit 'v2.6.37-rc2' into upstream/xenfsJeremy Fitzhardinge534-6211/+15296
* commit 'v2.6.37-rc2': (10093 commits) Linux 2.6.37-rc2 capabilities/syslog: open code cap_syslog logic to fix build failure i2c: Sanity checks on adapter registration i2c: Mark i2c_adapter.id as deprecated i2c: Drivers shouldn't include <linux/i2c-id.h> i2c: Delete unused adapter IDs i2c: Remove obsolete cleanup for clientdata include/linux/kernel.h: Move logging bits to include/linux/printk.h Fix gcc 4.5.1 miscompiling drivers/char/i8k.c (again) hwmon: (w83795) Check for BEEP pin availability hwmon: (w83795) Clear intrusion alarm immediately hwmon: (w83795) Read the intrusion state properly hwmon: (w83795) Print the actual temperature channels as sources hwmon: (w83795) List all usable temperature sources hwmon: (w83795) Expose fan control method hwmon: (w83795) Fix fan control mode attributes hwmon: (lm95241) Check validity of input values hwmon: Change mail address of Hans J. Koch PCI: sysfs: fix printk warnings GFS2: Fix inode deallocation race ...
2010-11-16xen: fix header export to userspaceRandy Dunlap1-4/+1
scripts/headers_install.pl prevents "__user" from being exported to userspace headers, so just use compiler.h to make sure that __user is defined and avoid the error. unifdef: linux-next-20101112/xx64/usr/include/xen/privcmd.h.tmp: 79: Premature EOF (#if line 33 depth 1) Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com> Cc: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Cc: xen-devel@lists.xensource.com (moderated for non-subscribers) Cc: virtualization@lists.osdl.org Cc: Tony Finch <dot@dotat.at> Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
2010-11-15capabilities/syslog: open code cap_syslog logic to fix build failureEric Paris1-5/+4
The addition of CONFIG_SECURITY_DMESG_RESTRICT resulted in a build failure when CONFIG_PRINTK=n. This is because the capabilities code which used the new option was built even though the variable in question didn't exist. The patch here fixes this by moving the capabilities checks out of the LSM and into the caller. All (known) LSMs should have been calling the capabilities hook already so it actually makes the code organization better to eliminate the hook altogether. Signed-off-by: Eric Paris <eparis@redhat.com> Acked-by: James Morris <jmorris@namei.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-11-15Merge branch 'i2c-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jdelvare/stagingLinus Torvalds2-23/+1
* 'i2c-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jdelvare/staging: i2c: Sanity checks on adapter registration i2c: Mark i2c_adapter.id as deprecated i2c: Drivers shouldn't include <linux/i2c-id.h> i2c: Delete unused adapter IDs i2c: Remove obsolete cleanup for clientdata
2010-11-15i2c: Mark i2c_adapter.id as deprecatedJean Delvare1-1/+1
It's about time to make it clear that i2c_adapter.id is deprecated. Hopefully this will remind the last user to move over to a different strategy. Signed-off-by: Jean Delvare <khali@linux-fr.org> Acked-by: Jarod Wilson <jarod@redhat.com> Acked-by: Mauro Carvalho Chehab <mchehab@redhat.com> Acked-by: Hans Verkuil <hverkuil@xs4all.nl>
2010-11-15i2c: Delete unused adapter IDsJean Delvare1-22/+0
Delete unused I2C adapter IDs. Special cases are: * I2C_HW_B_RIVA was still set in driver rivafb, however no other driver is ever looking for this value, so we can safely remove it. * I2C_HW_B_HDPVR is used in staging driver lirc_zilog, however no adapter ID is ever set to this value, so the code in question never runs. As the code additionally expects that I2C_HW_B_HDPVR may not be defined, we can delete it now and let the lirc_zilog driver maintainer rewrite this piece of code. Big thanks for Hans Verkuil for doing all the hard work :) Signed-off-by: Jean Delvare <khali@linux-fr.org> Acked-by: Jarod Wilson <jarod@redhat.com> Acked-by: Mauro Carvalho Chehab <mchehab@redhat.com> Acked-by: Hans Verkuil <hverkuil@xs4all.nl>
2010-11-15include/linux/kernel.h: Move logging bits to include/linux/printk.hLinus Torvalds2-244/+249
Move the logging bits from kernel.h into printk.h so that there is a bit more logical separation of the generic from the printk logging specific parts. Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-11-15Merge branch 'fbdev-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/lethal/fbdev-2.6Linus Torvalds1-1/+0
* 'fbdev-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/lethal/fbdev-2.6: fsl-diu-fb: drop dead ioctl define MAINTAINERS: Add an fbdev git tree entry. OMAP: DSS: Fix documentation regarding 'vram' kernel parameter OMAP: VRAM: Fix boot-time memory allocation OMAP: VRAM: improve VRAM error prints sisfb: limit POST memory test according to PCI resource length fbdev: sh_mobile_lcdc: use correct number of modes, when using the default fbdev: sh_mobile_lcdc: use the standard CEA-861 720p timing fbdev: sh_mobile_hdmi: properly clean up modedb on monitor unplug
2010-11-15Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6 into sh/urgentPaul Mundt31-55/+369
2010-11-15fsl-diu-fb: drop dead ioctl defineMike Frysinger1-1/+0
The fsl-diu-fb driver no longer uses this define, and we have a common one to cover this already (FBIO_WAITFORVSYNC). Signed-off-by: Mike Frysinger <vapier@gentoo.org> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2010-11-12Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6Linus Torvalds8-9/+40
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6: (66 commits) can-bcm: fix minor heap overflow gianfar: Do not call device_set_wakeup_enable() under a spinlock ipv6: Warn users if maximum number of routes is reached. docs: Add neigh/gc_thresh3 and route/max_size documentation. axnet_cs: fix resume problem for some Ax88790 chip ipv6: addrconf: don't remove address state on ifdown if the address is being kept tcp: Don't change unlocked socket state in tcp_v4_err(). x25: Prevent crashing when parsing bad X.25 facilities cxgb4vf: add call to Firmware to reset VF State. cxgb4vf: Fail open if link_start() fails. cxgb4vf: flesh out PCI Device ID Table ... cxgb4vf: fix some errors in Gather List to skb conversion cxgb4vf: fix bug in Generic Receive Offload cxgb4vf: don't implement trivial (and incorrect) ndo_select_queue() ixgbe: Look inside vlan when determining offload protocol. bnx2x: Look inside vlan when determining checksum proto. vlan: Add function to retrieve EtherType from vlan packets. virtio-net: init link state correctly ucc_geth: Fix deadlock ucc_geth: Do not bring the whole IF down when TX failure. ...
2010-11-12Merge branch 'usb-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb-2.6Linus Torvalds2-1/+3
* 'usb-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb-2.6: (28 commits) Revert "USB: xhci: Use GFP_ATOMIC under spin_lock" USB: ohci-jz4740: Fix spelling in MODULE_ALIAS UWB: Return UWB_RSV_ALLOC_NOT_FOUND rather than crashing on NULL dereference if kzalloc fails usb: core: fix information leak to userland usb: misc: iowarrior: fix information leak to userland usb: misc: sisusbvga: fix information leak to userland usb: subtle increased memory usage in u_serial USB: option: fix when the driver is loaded incorrectly for some Huawei devices. USB: xhci: Use GFP_ATOMIC under spin_lock usb: gadget: goku_udc: add registered flag bit, fixing build USB: ehci/mxc: compile fix USB: Fix FSL USB driver on non Open Firmware systems USB: the development of the usb tree is now in git usb: musb: fail unaligned DMA transfers on v1.8 and above USB: ftdi_sio: add device IDs for Milkymist One JTAG/serial usb.h: fix ioctl kernel-doc info usb: musb: gadget: kill duplicate code in musb_gadget_queue() usb: musb: Fix handling of spurious SESSREQ usb: musb: fix kernel oops when loading musb_hdrc module for the 2nd time USB: musb: blackfin: push clkin value to platform resources ...
2010-11-12Merge branch 'tty-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty-2.6Linus Torvalds1-1/+1
* 'tty-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty-2.6: n_gsm: Fix length handling n_gsm: Copy n2 over when configuring via ioctl interface serial: bfin_5xx: grab port lock before making port termios changes serial: bfin_5xx: disable CON_PRINTBUFFER for consoles serial: bfin_5xx: remove redundant SSYNC to improve TX speed serial: bfin_5xx: always include DMA headers vcs: make proper usage of the poll flags amiserial: Remove unused variable icount 8250: Fix tcsetattr to avoid ioctl(TIOCMIWAIT) hang tty_ldisc: Fix BUG() on hangup TTY: restore tty_ldisc_wait_idle SERIAL: blacklist si3052 chip drivers/serial/bfin_5xx.c: Fix line continuation defects tty: prevent DOS in the flush_to_ldisc 8250: add support for Kouwell KW-L221N-2 nozomi: Fix warning from the previous TIOCGCOUNT changes tty: fix warning in synclink driver tty: Fix formatting in tty.h tty: the development tree is now done in git
2010-11-12xen: implement XENMEM_machphys_mappingIan Campbell1-0/+13
This hypercall allows Xen to specify a non-default location for the machine to physical mapping. This capability is used when running a 32 bit domain 0 on a 64 bit hypervisor to shrink the hypervisor hole to exactly the size required. [ Impact: add Xen hypercall definitions ] Signed-off-by: Ian Campbell <ian.campbell@citrix.com> Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
2010-11-12vlan: Add function to retrieve EtherType from vlan packets.Hao Zheng1-0/+25
Depending on how a packet is vlan tagged (i.e. hardware accelerated or not), the encapsulated protocol is stored in different locations. This provides a consistent method of accessing that protocol, which is needed by drivers, security checks, etc. Signed-off-by: Hao Zheng <hzheng@nicira.com> Signed-off-by: Jesse Gross <jesse@nicira.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-11-12Merge git://git.kernel.org/pub/scm/linux/kernel/git/kaber/nf-2.6David S. Miller1-1/+1
2010-11-12Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/inputLinus Torvalds2-2/+17
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input: Input: do not pass injected events back to the originating handler Input: pcf8574_keypad - fix error handling in pcf8574_kp_probe Input: acecad - fix a memory leak in usb_acecad_probe error path Input: atkbd - add 'terminal' parameter for IBM Terminal keyboards Input: i8042 - add Sony VAIOs to MUX blacklist kgdboc: reset input devices (keyboards) when exiting debugger Input: export input_reset_device() for use in KGDB Input: adp5588-keys - unify common header defines
2010-11-12Merge branch 'for-linus' of git://git.kernel.dk/linux-2.6-blockLinus Torvalds5-12/+4
* 'for-linus' of git://git.kernel.dk/linux-2.6-block: (27 commits) block: remove unused copy_io_context() Documentation: remove anticipatory scheduler info block: remove REQ_HARDBARRIER ioprio: rcu_read_lock/unlock protect find_task_by_vpid call (V2) ioprio: fix RCU locking around task dereference block: ioctl: fix information leak to userland block: read i_size with i_size_read() cciss: fix proc warning on attempt to remove non-existant directory bio: take care not overflow page count when mapping/copying user data block: limit vec count in bio_kmalloc() and bio_alloc_map_data() block: take care not to overflow when calculating total iov length block: check for proper length of iov entries in blk_rq_map_user_iov() cciss: remove controllers supported by hpsa cciss: use usleep_range not msleep for small sleeps cciss: limit commands allocated on reset_devices cciss: Use kernel provided PCI state save and restore functions cciss: fix board status waiting code drbd: Removed checks for REQ_HARDBARRIER on incomming BIOs drbd: REQ_HARDBARRIER -> REQ_FUA transition for meta data accesses drbd: Removed the BIO_RW_BARRIER support form the receiver/epoch code ...
2010-11-12Merge branch 'perf-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tipLinus Torvalds1-0/+10
* 'perf-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: perf, amd: Use kmalloc_node(,__GFP_ZERO) for northbridge structure allocation perf_events: Fix time tracking in samples perf trace: update usage perf trace: update Documentation with new perf trace variants perf trace: live-mode command-line cleanup perf trace record: handle commands correctly perf record: make the record options available outside perf record perf trace scripting: remove system-wide param from shell scripts perf trace scripting: fix some small memory leaks and missing error checks perf: Fix usages of profile_cpu in builtin-top.c to use cpu_list perf, ui: Eliminate stack-smashing protection compiler complaint
2010-11-12Merge branch 'drm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6Linus Torvalds2-5/+78
* 'drm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6: (39 commits) drm/ttm: Be consistent on ttm_bo_init() failures drm/radeon/kms: Fix retrying ttm_bo_init() after it failed once. drm/radeon/kms: fix thermal sensor reporting on rv6xx drm/radeon/kms: fix bugs in ddc and cd path router code drm/radeon/kms: add support for clock/data path routers drm: vmwgfx: fix information leak to userland drivers/gpu: Use vzalloc drm/vmwgfx: Fix oops on failing bo pin drm/ttm: Remove the CAP_SYS_ADMIN requirement for bo pinning drm/ttm: Make sure a sync object doesn't disappear while we use it drm/radeon/kms: don't disable shared encoders on pre-DCE3 display blocks drivers/gpu/drm: Update WARN uses drivers/gpu/drm/vmwgfx: Fix k.alloc switched arguments DRM: ignore invalid EDID extensions drm/radeon/kms: make the connector code less verbose drm/ttm: remove failed ttm binding error printout drm/ttm: Add a barrier when unreserving drm/ttm: Remove mm init error printouts and checks drm/ttm: Remove pointless list_empty check drm/ttm: Use private locks for the default bo range manager ...
2010-11-12Merge branch 'for-2.6.37' of git://linux-nfs.org/~bfields/linuxLinus Torvalds1-4/+14
* 'for-2.6.37' of git://linux-nfs.org/~bfields/linux: locks: remove dead lease error-handling code locks: fix leak on merging leases nfsd4: fix 4.1 connection registration race
2010-11-12backlight: add low threshold to pwm backlightArun Murthy1-0/+1
The intensity of the backlight can be varied from a range of max_brightness to zero. Though most, if not all the pwm based backlight devices start flickering at lower brightness value. And also for each device there exists a brightness value below which the backlight appears to be turned off though the value is not equal to zero. If the range of brightness for a device is from zero to max_brightness. A graph is plotted for brightness Vs intensity for the pwm based backlight device has to be a linear graph. intensity | / | / | / |/ --------- 0 max_brightness But pratically on measuring the above we note that the intensity of backlight goes to zero(OFF) when the value in not zero almost nearing to zero(some x%). so the graph looks like intensity | / | / | / | | ------------ 0 x max_brightness In order to overcome this drawback knowing this x% i.e nothing but the low threshold beyond which the backlight is off and will have no effect, the brightness value is being offset by the low threshold value(retaining the linearity of the graph). Now the graph becomes intensity | / | / | / | / ------------- 0 max_brightness With this for each and every digit increment in the brightness from zero there is a change in the intensity of backlight. Devices having this behaviour can set the low threshold brightness(lth_brightness) and pass the same as platform data else can have it as zero. [akpm@linux-foundation.org: coding-style fixes] Signed-off-by: Arun Murthy <arun.murthy@stericsson.com> Acked-by: Linus Walleij <linus.walleij@stericsson.com> Acked-by: Richard Purdie <rpurdie@linux.intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-11-12leds: driver for National Semiconductors LP5523 chipSamu Onkalo1-0/+47
LP5523 chip is nine channel led driver with programmable engines. Driver provides support for that chip for direct access via led class or via programmable engines. Signed-off-by: Samu Onkalo <samu.p.onkalo@nokia.com> Cc: Richard Purdie <rpurdie@rpsys.net> Cc: Jean Delvare <khali@linux-fr.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-11-12leds: driver for National Semiconductor LP5521 chipSamu Onkalo1-0/+47
This patchset provides support for LP5521 and LP5523 LED driver chips from National Semicondutor. Both drivers supports programmable engines and naturally LED class features. Documentation is provided as a part of the patchset. I created "leds" subdirectory under Documentation. Perhaps the rest of the leds* documentation should be moved there. Datasheets are freely available at National Semiconductor www pages. This patch: LP5521 chip is three channel led driver with programmable engines. Driver provides support for that chip for direct access via led class or via programmable engines. Signed-off-by: Samu Onkalo <samu.p.onkalo@nokia.com> Cc: Richard Purdie <rpurdie@rpsys.net> Cc: Jean Delvare <khali@linux-fr.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-11-12led-class: always implement blinkingJohannes Berg1-4/+43
Currently, blinking LEDs can be awkward because it is not guaranteed that all LEDs implement blinking. The trigger that wants it to blink then needs to implement its own timer solution. Rather than require that, add led_blink_set() API that triggers can use. This function will attempt to use hw blinking, but if that fails implements a timer for it. To stop blinking again, brightness_set() also needs to be wrapped into API that will stop the software blink. As a result of this, the timer trigger becomes a very trivial one, and hopefully we can finally see triggers using blinking as well because it's always easy to use. Signed-off-by: Johannes Berg <johannes.berg@intel.com> Acked-by: Richard Purdie <rpurdie@linux.intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-11-12radix-tree: fix RCU bugNick Piggin1-16/+23
Salman Qazi describes the following radix-tree bug: In the following case, we get can get a deadlock: 0. The radix tree contains two items, one has the index 0. 1. The reader (in this case find_get_pages) takes the rcu_read_lock. 2. The reader acquires slot(s) for item(s) including the index 0 item. 3. The non-zero index item is deleted, and as a consequence the other item is moved to the root of the tree. The place where it used to be is queued for deletion after the readers finish. 3b. The zero item is deleted, removing it from the direct slot, it remains in the rcu-delayed indirect node. 4. The reader looks at the index 0 slot, and finds that the page has 0 ref count 5. The reader looks at it again, hoping that the item will either be freed or the ref count will increase. This never happens, as the slot it is looking at will never be updated. Also, this slot can never be reclaimed because the reader is holding rcu_read_lock and is in an infinite loop. The fix is to re-use the same "indirect" pointer case that requires a slot lookup retry into a general "retry the lookup" bit. Signed-off-by: Nick Piggin <npiggin@kernel.dk> Reported-by: Salman Qazi <sqazi@google.com> Cc: <stable@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-11-12Restrict unprivileged access to kernel syslogDan Rosenberg1-0/+1
The kernel syslog contains debugging information that is often useful during exploitation of other vulnerabilities, such as kernel heap addresses. Rather than futilely attempt to sanitize hundreds (or thousands) of printk statements and simultaneously cripple useful debugging functionality, it is far simpler to create an option that prevents unprivileged users from reading the syslog. This patch, loosely based on grsecurity's GRKERNSEC_DMESG, creates the dmesg_restrict sysctl. When set to "0", the default, no restrictions are enforced. When set to "1", only users with CAP_SYS_ADMIN can read the kernel syslog via dmesg(8) or other mechanisms. [akpm@linux-foundation.org: explain the config option in kernel.txt] Signed-off-by: Dan Rosenberg <drosenberg@vsecurity.com> Acked-by: Ingo Molnar <mingo@elte.hu> Acked-by: Eugene Teo <eugeneteo@kernel.org> Acked-by: Kees Cook <kees.cook@canonical.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-11-12include/linux/highmem.h needs hardirq.hCatalin Marinas1-0/+1
Commit 3e4d3af501cc ("mm: stack based kmap_atomic()") introduced the kmap_atomic_idx_push() function which warns on in_irq() with CONFIG_DEBUG_HIGHMEM enabled. This patch includes linux/hardirq.h for the in_irq definition. Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-11-12atomic: add atomic_inc_not_zero_hint()Eric Dumazet1-0/+37
Followup of perf tools session in Netfilter WorkShop 2010 In the network stack we make high usage of atomic_inc_not_zero() in contexts we know the probable value of atomic before increment (2 for udp sockets for example) Using a special version of atomic_inc_not_zero() giving this hint can help processor to use less bus transactions. On x86 (MESI protocol) for example, this avoids entering Shared state, because "lock cmpxchg" issues an RFO (Read For Ownership) akpm: Adds a new include/linux/atomic.h. This means that new code should henceforth include linux/atomic.h and not asm/atomic.h. The presence of include/linux/atomic.h will in fact cause checkpatch.pl to warn about use of asm/atomic.h. The new include/linux/atomic.h becomes the place where arch-neutral atomic_t code should be placed. [akpm@linux-foundation.org: coding-style fixes] Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Cc: Christoph Lameter <cl@linux-foundation.org> Cc: Ingo Molnar <mingo@elte.hu> Cc: Andi Kleen <andi@firstfloor.org> Cc: Arnaldo Carvalho de Melo <acme@infradead.org> Cc: David Miller <davem@davemloft.net> Cc: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> Cc: Nick Piggin <npiggin@kernel.dk> Reviewed-by: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-11-12include/linux/resource.h needs types.hJean Delvare1-0/+1
Fix the following warning: usr/include/linux/resource.h:49: found __[us]{8,16,32,64} type without #include <linux/types.h> Signed-off-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>
2010-11-12netfilter: NF_HOOK_COND has wrong conditionalEric Paris1-1/+1
The NF_HOOK_COND returns 0 when it shouldn't due to what I believe to be an error in the code as the order of operations is not what was intended. C will evalutate == before =. Which means ret is getting set to the bool result, rather than the return value of the function call. The code says if (ret = function() == 1) when it meant to say: if ((ret = function()) == 1) Normally the compiler would warn, but it doesn't notice it because its a actually complex conditional and so the wrong code is wrapped in an explict set of () [exactly what the compiler wants you to do if this was intentional]. Fixing this means that errors when netfilter denies a packet get propagated back up the stack rather than lost. Problem introduced by commit 2249065f (netfilter: get rid of the grossness in netfilter.h). Signed-off-by: Eric Paris <eparis@redhat.com> Cc: stable@kernel.org Signed-off-by: Patrick McHardy <kaber@trash.net>
2010-11-11block: remove unused copy_io_context()Jens Axboe1-1/+0
Reported-by: Oleg Nesterov <oleg@redhat.com> Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
2010-11-10perf_events: Fix time tracking in samplesStephane Eranian1-0/+10
This patch corrects time tracking in samples. Without this patch both time_enabled and time_running are bogus when user asks for PERF_SAMPLE_READ. One uses PERF_SAMPLE_READ to sample the values of other counters in each sample. Because of multiplexing, it is necessary to know both time_enabled, time_running to be able to scale counts correctly. In this second version of the patch, we maintain a shadow copy of ctx->time which allows us to compute ctx->time without calling update_context_time() from NMI context. We avoid the issue that update_context_time() must always be called with ctx->lock held. We do not keep shadow copies of the other event timings because if the lead event is overflowing then it is active and thus it's been scheduled in via event_sched_in() in which case neither tstamp_stopped, tstamp_running can be modified. This timing logic only applies to samples when PERF_SAMPLE_READ is used. Note that this patch does not address timing issues related to sampling inheritance between tasks. This will be addressed in a future patch. With this patch, the libpfm4 example task_smpl now reports correct counts (shown on 2.4GHz Core 2): $ task_smpl -p 2400000000 -e unhalted_core_cycles:u,instructions_retired:u,baclears noploop 5 noploop for 5 seconds IIP:0x000000004006d6 PID:5596 TID:5596 TIME:466,210,211,430 STREAM_ID:33 PERIOD:2,400,000,000 ENA=1,010,157,814 RUN=1,010,157,814 NR=3 2,400,000,254 unhalted_core_cycles:u (33) 2,399,273,744 instructions_retired:u (34) 53,340 baclears (35) Signed-off-by: Stephane Eranian <eranian@google.com> Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> LKML-Reference: <4cc6e14b.1e07e30a.256e.5190@mx.google.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-11-10net: avoid limits overflowEric Dumazet4-8/+8
Robin Holt tried to boot a 16TB machine and found some limits were reached : sysctl_tcp_mem[2], sysctl_udp_mem[2] We can switch infrastructure to use long "instead" of "int", now atomic_long_t primitives are available for free. Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Reported-by: Robin Holt <holt@sgi.com> Reviewed-by: Robin Holt <holt@sgi.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-11-10block: remove REQ_HARDBARRIERChristoph Hellwig3-10/+3
REQ_HARDBARRIER is dead now, so remove the leftovers. What's left at this point is: - various checks inside the block layer. - sanity checks in bio based drivers. - now unused bio_empty_barrier helper. - Xen blockfront use of BLKIF_OP_WRITE_BARRIER - it's dead for a while, but Xen really needs to sort out it's barrier situaton. - setting of ordered tags in uas - dead code copied from old scsi drivers. - scsi different retry for barriers - it's dead and should have been removed when flushes were converted to FS requests. - blktrace handling of barriers - removed. Someone who knows blktrace better should add support for REQ_FLUSH and REQ_FUA, though. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
2010-11-10Merge branch 'for-2.6.37/drivers' into for-linusJens Axboe1-1/+1
Conflicts: drivers/block/cciss.c Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
2010-11-10drm/ttm: Be consistent on ttm_bo_init() failuresThomas Hellstrom1-0/+4
Call destroy() on _all_ ttm_bo_init() failures, and make sure that behavior is documented in the function description. Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com> Signed-off-by: Dave Airlie <airlied@redhat.com>
2010-11-09tty: Fix formatting in tty.hAlan Cox1-1/+1
Someone added a new ldisc number and messed up the tabbing. Fix it before anyone else copies it. Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-11-09Merge branch 'musb-v2.6.37-rc2' of git://gitorious.org/usb/usb into work-linusGreg Kroah-Hartman1-0/+2
2010-11-09sh: intc: Fix up initializers for gcc 4.5.Paul Mundt1-1/+1
The _INTC_ARRAY() initializer presently does a NULL test which blows up as a non-constant initializer under gcc 4.5. This switches over to a type test to account for NULL initializers explicitly. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2010-11-09drm/ttm: Documentation updateThomas Hellstrom1-5/+74
Remove an obsolete comment about mm nodes. Document the new bo range manager interface. Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com> Signed-off-by: Dave Airlie <airlied@redhat.com>
2010-11-09kernel: Constify temporary variable in roundup()Tetsuo Handa1-1/+1
Fix build error with GCC 3.x caused by commit b28efd54 "kernel: roundup should only reference arguments once" by constifying temporary variable used in that macro. Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Suggested-by: Andrew Morton <akpm@linux-foundation.org> Acked-by: Eric Paris <eparis@redhat.com> Signed-off-by: James Morris <jmorris@namei.org>
2010-11-08usb.h: fix ioctl kernel-doc infoRandy Dunlap1-1/+1
Fix struct field name, prevent kernel-doc warnings. Warning(include/linux/usb.h:865): No description found for parameter 'unlocked_ioctl' Warning(include/linux/usb.h:865): Excess struct/union/enum/typedef member 'ioctl' description in 'usb_driver' Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-11-08net: Detect and ignore netif_stop_queue() calls before register_netdev()Guillaume Chazarain1-0/+5
After e6484930d7c73d324bccda7d43d131088da697b9: net: allocate tx queues in register_netdevice These calls make net drivers oops at load time, so let's avoid people git-bisect'ing known problems. Signed-off-by: Guillaume Chazarain <guichaz@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-11-08Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4Linus Torvalds1-0/+97
* 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4: ext4: Add new ext4 inode tracepoints ext4: Don't call sb_issue_discard() in ext4_free_blocks() ext4: do not try to grab the s_umount semaphore in ext4_quota_off ext4: fix potential race when freeing ext4_io_page structures ext4: handle writeback of inodes which are being freed ext4: initialize the percpu counters before replaying the journal ext4: "ret" may be used uninitialized in ext4_lazyinit_thread() ext4: fix lazyinit hang after removing request
2010-11-08Merge branch 'rmobile-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/lethal/sh-2.6Linus Torvalds2-10/+9
* 'rmobile-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/lethal/sh-2.6: mmc: sh_mmcif: Convert extern inline to static inline. ARM: mach-shmobile: Allow GPIO chips to register IRQ mappings. ARM: mach-shmobile: fix sh7372 after a recent clock framework rework ARM: mach-shmobile: include drivers/sh/Kconfig ARM: mach-shmobile: ap4evb: Add HDMI sound support ARM: mach-shmobile: clock-sh7372: Add FSIDIV clock support ARM: shmobile: remove sh_timer_config clk member
2010-11-08ext4: Add new ext4 inode tracepointsTheodore Ts'o1-0/+97
Add ext4_evict_inode, ext4_drop_inode, ext4_mark_inode_dirty, and ext4_begin_ordered_truncate() Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2010-11-07net dst: need linux/cache.h for ____cacheline_aligned_in_smp.Paul Mundt1-0/+1
Presently the b43legacy build fails on an sh randconfig: In file included from include/net/dst.h:12, from drivers/net/wireless/b43legacy/xmit.c:32: include/net/dst_ops.h:28: error: expected ':', ',', ';', '}' or '__attribute__' before '____cacheline_aligned_in_smp' include/net/dst_ops.h: In function 'dst_entries_get_fast': include/net/dst_ops.h:33: error: 'struct dst_ops' has no member named 'pcpuc_entries' include/net/dst_ops.h: In function 'dst_entries_get_slow': include/net/dst_ops.h:41: error: 'struct dst_ops' has no member named 'pcpuc_entries' include/net/dst_ops.h: In function 'dst_entries_add': include/net/dst_ops.h:49: error: 'struct dst_ops' has no member named 'pcpuc_entries' include/net/dst_ops.h: In function 'dst_entries_init': include/net/dst_ops.h:55: error: 'struct dst_ops' has no member named 'pcpuc_entries' include/net/dst_ops.h: In function 'dst_entries_destroy': include/net/dst_ops.h:60: error: 'struct dst_ops' has no member named 'pcpuc_entries' make[5]: *** [drivers/net/wireless/b43legacy/xmit.o] Error 1 make[5]: *** Waiting for unfinished jobs.... Signed-off-by: Paul Mundt <lethal@linux-sh.org> Signed-off-by: David S. Miller <davem@davemloft.net>