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2010-11-25Merge branch 'fbdev-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/lethal/fbdev-2.6Linus Torvalds1-0/+1
* 'fbdev-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/lethal/fbdev-2.6: sisfb: delete osdef.h sisfb: move the CONFIG warning to sis_main.c sisfb: replace SiS_SetMemory with memset_io sisfb: remove InPort/OutPort wrappers sisfb: use CONFIG_FB_SIS_301/315 instead of SIS301/315H sisfb: delete redudant #define SIS_LINUX_KERNEL sisfb: delete dead SIS_XORG_XF86 code sisfb: delete fallback code for pci_map_rom() sisfb: delete obsolete PCI ROM bug workaround fbdev: Update documentation index file. lxfb: Program panel v/h sync output polarity correctly fbcmap: integer overflow bug fbcmap: cleanup white space in fb_alloc_cmap() MAINTAINERS: Add fbdev patchwork entry, tidy up file patterns. fbdev: da8xx: punt duplicated FBIO_WAITFORVSYNC define fbdev: sh_mobile_lcdcfb: fix bug in reconfig()
2010-11-25Merge branch 'sh-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/lethal/sh-2.6Linus Torvalds1-31/+3
* 'sh-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/lethal/sh-2.6: sh: clkfwk: Build fix for non-legacy CPG changes. sh: Use GCC __builtin_prefetch() to implement prefetch(). sh: fix vsyscall compilation due to .eh_frame issue sh: avoid to flush all cache in sys_cacheflush sh: clkfwk: Disable init clk op for non-legacy clocks. sh: clkfwk: Kill off now unused algo_id in set_rate op. sh: clkfwk: Kill off unused clk_set_rate_ex().
2010-11-25Merge git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-for-linusLinus Torvalds1-1/+1
* git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-for-linus: virtio: fix format of sysfs driver/vendor files Char: virtio_console, fix memory leak virtio: return correct capacity to users module: Update prototype for ref_module (formerly use_module)
2010-11-25memcg: fix false positive VM_BUG on non-SMPKirill A. Shutemov1-2/+5
Fix this: kernel BUG at mm/memcontrol.c:2155! invalid opcode: 0000 [#1] last sysfs file: Pid: 18, comm: sh Not tainted 2.6.37-rc3 #3 /Bochs EIP: 0060:[<c10731b2>] EFLAGS: 00000246 CPU: 0 EIP is at mem_cgroup_move_account+0xe2/0xf0 EAX: 00000004 EBX: c6f931d4 ECX: c681c300 EDX: c681c000 ESI: c681c300 EDI: ffffffea EBP: c681c000 ESP: c46f3e30 DS: 007b ES: 007b FS: 0000 GS: 0033 SS: 0068 Process sh (pid: 18, ti=c46f2000 task=c6826e60 task.ti=c46f2000) Stack: 00000155 c681c000 0805f000 c46ee180 c46f3e5c c7058820 c1074d37 00000000 08060000 c46db9a0 c46ec080 c7058820 0805f000 08060000 c46f3e98 c1074c50 c106c75e c46f3e98 c46ec080 08060000 0805ffff c46db9a0 c46f3e98 c46e0340 Call Trace: [<c1074d37>] ? mem_cgroup_move_charge_pte_range+0xe7/0x130 [<c1074c50>] ? mem_cgroup_move_charge_pte_range+0x0/0x130 [<c106c75e>] ? walk_page_range+0xee/0x1d0 [<c10725d6>] ? mem_cgroup_move_task+0x66/0x90 [<c1074c50>] ? mem_cgroup_move_charge_pte_range+0x0/0x130 [<c1072570>] ? mem_cgroup_move_task+0x0/0x90 [<c1042616>] ? cgroup_attach_task+0x136/0x200 [<c1042878>] ? cgroup_tasks_write+0x48/0xc0 [<c1041e9e>] ? cgroup_file_write+0xde/0x220 [<c101398d>] ? do_page_fault+0x17d/0x3f0 [<c108a79d>] ? alloc_fd+0x2d/0xd0 [<c1041dc0>] ? cgroup_file_write+0x0/0x220 [<c1077ba2>] ? vfs_write+0x92/0xc0 [<c1077c81>] ? sys_write+0x41/0x70 [<c1140e3d>] ? syscall_call+0x7/0xb Code: 03 00 74 09 8b 44 24 04 e8 1c f1 ff ff 89 73 04 8d 86 b0 00 00 00 b9 01 00 00 00 89 da 31 ff e8 65 f5 ff ff e9 4d ff ff ff 0f 0b <0f> 0b 0f 0b 0f 0b 90 8d b4 26 00 00 00 00 83 ec 10 8b 0d f4 e3 EIP: [<c10731b2>] mem_cgroup_move_account+0xe2/0xf0 SS:ESP 0068:c46f3e30 ---[ end trace 7daa1582159b6532 ]--- lock_page_cgroup and unlock_page_cgroup are implemented using bit_spinlock. bit_spinlock doesn't touch the bit if we are on non-SMP machine, so we can't use the bit to check whether the lock was taken. Let's introduce is_page_cgroup_locked based on bit_spin_is_locked instead of PageCgroupLocked to fix it. [akpm@linux-foundation.org: s/is_page_cgroup_locked/page_is_cgroup_locked/] Signed-off-by: Kirill A. Shutemov <kirill@shutemov.name> Reviewed-by: Johannes Weiner <hannes@cmpxchg.org> Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujtisu.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-11-25include/linux/fs.h: fix userspace buildLoïc Minier1-3/+3
dpkg uses fiemap but didn't particularly need to include stdint.h so far. Since 367a51a33902 ("fs: Add FITRIM ioctl"), build of linux/fs.h failed in dpkg with: In file included from ../../src/filesdb.c:27:0: /usr/include/linux/fs.h:37:2: error: expected specifier-qualifier-list before 'uint64_t' Use exportable type __u64 to avoid the dependency on stdint.h. b31d42a5af18 ("Fix compile brekage with !CONFIG_BLOCK") fixed only the kernel build by including linux/types.h, but this also fixed "make headers_check", so don't revert it. Signed-off-by: Loïc Minier <loic.minier@linaro.org> Tested-by: Arnd Bergmann <arnd.bergmann@linaro.org> Cc: Lukas Czerner <lczerner@redhat.com> Cc: Dmitry Monakhov <dmonakhov@openvz.org> Cc: Theodore Ts'o <tytso@mit.edu> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-11-24Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-next-2.6 into for-davemJohn W. Linville3-0/+65
2010-11-24cfg80211: allow using CQM event to notify packet lossJohannes Berg1-0/+3
This adds the ability for drivers to use CQM events to notify about packet loss for specific stations (which could be the AP for the managed mode case). Since the threshold might be determined by the driver (it isn't passed in right now) it will be passed out of the driver to userspace in the event. Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2010-11-24Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-2.6John W. Linville1-0/+1
2010-11-24Revert "nl80211/mac80211: Report signal average"John W. Linville1-2/+0
This reverts commit 86107fd170bc379869250eb7e1bd393a3a70e8ae. This patch inadvertantly changed the userland ABI. Signed-off-by: John W. Linville <linville@tuxdriver.com>
2010-11-24xps: Transmit Packet SteeringTom Herbert1-0/+30
This patch implements transmit packet steering (XPS) for multiqueue devices. XPS selects a transmit queue during packet transmission based on configuration. This is done by mapping the CPU transmitting the packet to a queue. This is the transmit side analogue to RPS-- where RPS is selecting a CPU based on receive queue, XPS selects a queue based on the CPU (previously there was an XPS patch from Eric Dumazet, but that might more appropriately be called transmit completion steering). Each transmit queue can be associated with a number of CPUs which will use the queue to send packets. This is configured as a CPU mask on a per queue basis in: /sys/class/net/eth<n>/queues/tx-<n>/xps_cpus The mappings are stored per device in an inverted data structure that maps CPUs to queues. In the netdevice structure this is an array of num_possible_cpu structures where each structure holds and array of queue_indexes for queues which that CPU can use. The benefits of XPS are improved locality in the per queue data structures. Also, transmit completions are more likely to be done nearer to the sending thread, so this should promote locality back to the socket on free (e.g. UDP). The benefits of XPS are dependent on cache hierarchy, application load, and other factors. XPS would nominally be configured so that a queue would only be shared by CPUs which are sharing a cache, the degenerative configuration woud be that each CPU has it's own queue. Below are some benchmark results which show the potential benfit of this patch. The netperf test has 500 instances of netperf TCP_RR test with 1 byte req. and resp. bnx2x on 16 core AMD XPS (16 queues, 1 TX queue per CPU) 1234K at 100% CPU No XPS (16 queues) 996K at 100% CPU Signed-off-by: Tom Herbert <therbert@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-11-24xps: Improvements in TX queue selectionTom Herbert1-1/+2
In dev_pick_tx, don't do work in calculating queue index or setting the index in the sock unless the device has more than one queue. This allows the sock to be set only with a queue index of a multi-queue device which is desirable if device are stacked like in a tunnel. We also allow the mapping of a socket to queue to be changed. To maintain in order packet transmission a flag (ooo_okay) has been added to the sk_buff structure. If a transport layer sets this flag on a packet, the transmit queue can be changed for the socket. Presumably, the transport would set this if there was no possbility of creating OOO packets (for instance, there are no packets in flight for the socket). This patch includes the modification in TCP output for setting this flag. Signed-off-by: Tom Herbert <therbert@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-11-24ipv6: mcast: RCU conversionEric Dumazet1-1/+1
ipv6_sk_mc_lock rwlock becomes a spinlock. readers (inet6_mc_check()) now takes rcu_read_lock() instead of read lock. Writers dont need to disable BH anymore. struct ipv6_mc_socklist objects are reclaimed after one RCU grace period. Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-11-24stmmac: add init/exit callback in plat_stmmacenet_data structGiuseppe CAVALLARO1-3/+3
This patch adds in the plat_stmmacenet_data the init and exit callbacks that can be used for invoking specific platform functions. For example, on ST targets, these call the PAD manager functions to set PIO lines and syscfg registers. The patch removes the stmmac_claim_resource only used on STM Kernels as well. Signed-off-by: Giuseppe Cavallaro <peppe.cavallaro@st.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-11-24Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-2.6David S. Miller1-0/+1
2010-11-24module: Update prototype for ref_module (formerly use_module)Anders Kaseorg1-1/+1
Commit 9bea7f23952d5948f8e5dfdff4de09bb9981fb5f renamed use_module to ref_module (and changed its return value), but forgot to update this prototype in module.h. Signed-off-by: Anders Kaseorg <andersk@ksplice.com> Acked-by: WANG Cong <xiyou.wangcong@gmail.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2010-11-24Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-2.6Linus Torvalds1-3/+0
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-2.6: (41 commits) ALSA: hda - Identify more variants for ALC269 ALSA: hda - Fix wrong ALC269 variant check ALSA: hda - Enable jack sense for Thinkpad Edge 11 ALSA: Revert "ALSA: hda - Fix switching between dmic and mic using the same mux on IDT/STAC" ALSA: hda - Fixed ALC887-VD initial error ALSA: atmel - Fix the return value in error path ALSA: hda: Use hp-laptop quirk to enable headphones automute for Asus A52J ALSA: snd-atmel-abdac: test wrong variable ALSA: azt3328: period bug fix (for PA), add missing ACK on stop timer ALSA: hda: Add Samsung R720 SSID for subwoofer pin fixup ALSA: sound/pci/asihpi/hpioctl.c: Remove unnecessary casts of pci_get_drvdata ALSA: sound/core/pcm_lib.c: Remove unnecessary semicolons ALSA: sound/ppc: Use printf extension %pR for struct resource ALSA: ac97: Apply quirk for Dell Latitude D610 binding Master and Headphone controls ASoC: uda134x - set reg_cache_default to uda134x_reg ASoC: Add support for MAX98089 CODEC ASoC: davinci: fixes for multi-component ASoC: Fix register cache setup WM8994 for multi-component ASoC: Fix dapm_seq_compare() for multi-component ASoC: RX1950: Fix hw_params function ...
2010-11-24Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6Linus Torvalds1-0/+1
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6: of/phylib: Use device tree properties to initialize Marvell PHYs. phylib: Add support for Marvell 88E1149R devices. phylib: Use common page register definition for Marvell PHYs. qlge: Fix incorrect usage of module parameters and netdev msg level ipv6: fix missing in6_ifa_put in addrconf SuperH IrDA: correct Baud rate error correction atl1c: Fix hardware type check for enabling OTP CLK net: allow GFP_HIGHMEM in __vmalloc() bonding: change list contact to netdev@vger.kernel.org e1000: fix screaming IRQ
2010-11-22ssb: b43-pci-bridge: Add new vendor for BCM4318Daniel Klaffenbach1-0/+1
Add new vendor for Broadcom 4318. Signed-off-by: Daniel Klaffenbach <danielklaffenbach@gmail.com> Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net> Cc: Stable <stable@kernel.org> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2010-11-22NFS: Ensure we return the dirent->d_type when it is knownTrond Myklebust1-0/+1
Store the dirent->d_type in the struct nfs_cache_array_entry so that we can use it in getdents() calls. This fixes a regression with the new readdir code. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2010-11-22phylib: Add support for Marvell 88E1149R devices.David Daney1-0/+1
The 88E1149R is 10/100/1000 quad-gigabit Ethernet PHY. The .config_aneg function can be shared with 88E1118, but it needs its own .config_init. Signed-off-by: David Daney <ddaney@caviumnetworks.com> Cc: Cyril Chemparathy <cyril@ti.com> Cc: Arnaud Patard <arnaud.patard@rtp-net.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Wolfram Sang <w.sang@pengutronix.de> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-11-22macvlan: Introduce 'passthru' mode to takeover the underlying deviceSridhar Samudrala1-0/+1
With the current default 'vepa' mode, a KVM guest using virtio with macvtap backend has the following limitations. - cannot change/add a mac address on the guest virtio-net - cannot create a vlan device on the guest virtio-net - cannot enable promiscuous mode on guest virtio-net To address these limitations, this patch introduces a new mode called 'passthru' when creating a macvlan device which allows takeover of the underlying device and passing it to a guest using virtio with macvtap backend. Only one macvlan device is allowed in passthru mode and it inherits the mac address from the underlying device and sets it in promiscuous mode to receive and forward all the packets. Signed-off-by: Sridhar Samudrala <sri@us.ibm.com> ------------------------------------------------------------------------- Signed-off-by: David S. Miller <davem@davemloft.net>
2010-11-22usb: musb: do not use dma for control transfersAnand Gadiyar1-0/+4
The Inventra DMA engine used with the MUSB controller in many SoCs cannot use DMA for control transfers on EP0, but can use DMA for all other transfers. The USB core maps urbs for DMA if hcd->self.uses_dma is true. (hcd->self.uses_dma is true for MUSB as well). Split the uses_dma flag into two - one that says if the controller needs to use PIO for control transfers, and another which says if the controller uses DMA (for all other transfers). Also, populate this flag for all MUSB by default. (Tested on OMAP3 and OMAP4 boards, with EHCI and MUSB HCDs simultaneously in use). Signed-off-by: Maulik Mankad <x0082077@ti.com> Signed-off-by: Santosh Shilimkar <santosh.shilimkar@ti.com> Signed-off-by: Anand Gadiyar <gadiyar@ti.com> Cc: Oliver Neukum <oliver@neukum.org> Cc: Alan Stern <stern@rowland.harvard.edu> Cc: Praveena NADAHALLY <praveen.nadahally@stericsson.com> Cc: Ajay Kumar Gupta <ajay.gupta@ti.com> Signed-off-by: Felipe Balbi <balbi@ti.com>
2010-11-19Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4Linus Torvalds1-1/+0
* 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4: ext4: Add EXT4_IOC_TRIM ioctl to handle batched discard fs: Do not dispatch FITRIM through separate super_operation ext4: ext4_fill_super shouldn't return 0 on corruption jbd2: fix /proc/fs/jbd2/<dev> when using an external journal ext4: missing unlock in ext4_clear_request_list() ext4: fix setting random pages PageUptodate
2010-11-19fs: Do not dispatch FITRIM through separate super_operationLukas Czerner1-1/+0
There was concern that FITRIM ioctl is not common enough to be included in core vfs ioctl, as Christoph Hellwig pointed out there's no real point in dispatching this out to a separate vector instead of just through ->ioctl. So this commit removes ioctl_fstrim() from vfs ioctl and trim_fs from super_operation structure. Signed-off-by: Lukas Czerner <lczerner@redhat.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2010-11-19Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-clientLinus Torvalds3-4/+7
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client: ceph: fix readdir EOVERFLOW on 32-bit archs ceph: fix frag offset for non-leftmost frags ceph: fix dangling pointer ceph: explicitly specify page alignment in network messages ceph: make page alignment explicit in osd interface ceph: fix comment, remove extraneous args ceph: fix update of ctime from MDS ceph: fix version check on racing inode updates ceph: fix uid/gid on resent mds requests ceph: fix rdcache_gen usage and invalidate ceph: re-request max_size if cap auth changes ceph: only let auth caps update max_size ceph: fix open for write on clustered mds ceph: fix bad pointer dereference in ceph_fill_trace ceph: fix small seq message skipping Revert "ceph: update issue_seq on cap grant"
2010-11-19Merge 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: (31 commits) net: fix kernel-doc for sk_filter_rcu_release be2net: Fix to avoid firmware update when interface is not open. netfilter: fix IP_VS dependencies net: irda: irttp: sync error paths of data- and udata-requests ipv6: Expose reachable and retrans timer values as msecs ipv6: Expose IFLA_PROTINFO timer values in msecs instead of jiffies 3c59x: fix build failure on !CONFIG_PCI ipg.c: remove id [SUNDANCE, 0x1021] net: caif: spi: fix potential NULL dereference ath9k_htc: Avoid setting QoS control for non-QoS frames net: zero kobject in rx_queue_release net: Fix duplicate volatile warning. MAINTAINERS: Add stmmac maintainer bonding: fix a race in IGMP handling cfg80211: fix can_beacon_sec_chan, reenable HT40 gianfar: fix signedness issue net: bnx2x: fix error value sign 8139cp: fix checksum broken r8169: fix checksum broken rds: Integer overflow in RDS cmsg handling ...
2010-11-19mmc: sdio: fix runtime PM anomalies by introducing MMC_CAP_POWER_OFF_CARDOhad Ben-Cohen1-0/+1
Some board/card/host configurations are not capable of powering off the card after boot. To support such configurations, and to allow smoother transition to runtime PM behavior, MMC_CAP_POWER_OFF_CARD is added, so hosts need to explicitly indicate whether it's OK to power off their cards after boot. SDIO core will enable runtime PM for a card only if that cap is set. As a result, the card will be powered down after boot, and will only be powered up again when a driver is loaded (and then it's up to the driver to decide whether power will be kept or not). This will prevent sdio_bus_probe() failures with setups that do not support powering off the card. Reported-and-tested-by: Daniel Drake <dsd@laptop.org> Reported-and-tested-by: Arnd Hannemann <arnd@arndnet.de> Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com> Signed-off-by: Chris Ball <cjb@laptop.org>
2010-11-19Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6David S. Miller1-1/+1
Conflicts: drivers/net/bonding/bond_main.c net/core/net-sysfs.c net/ipv6/addrconf.c
2010-11-19filter: optimize sk_run_filterEric Dumazet1-1/+1
Remove pc variable to avoid arithmetic to compute fentry at each filter instruction. Jumps directly manipulate fentry pointer. As the last instruction of filter[] is guaranteed to be a RETURN, and all jumps are before the last instruction, we dont need to check filter bounds (number of instructions in filter array) at each iteration, so we remove it from sk_run_filter() params. On x86_32 remove f_k var introduced in commit 57fe93b374a6b871 (filter: make sure filters dont read uninitialized memory) Note : We could use a CONFIG_ARCH_HAS_{FEW|MANY}_REGISTERS in order to avoid too many ifdefs in this code. This helps compiler to use cpu registers to hold fentry and A accumulator. On x86_32, this saves 401 bytes, and more important, sk_run_filter() runs much faster because less register pressure (One less conditional branch per BPF instruction) # size net/core/filter.o net/core/filter_pre.o text data bss dec hex filename 2948 0 0 2948 b84 net/core/filter.o 3349 0 0 3349 d15 net/core/filter_pre.o on x86_64 : # size net/core/filter.o net/core/filter_pre.o text data bss dec hex filename 5173 0 0 5173 1435 net/core/filter.o 5224 0 0 5224 1468 net/core/filter_pre.o Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Acked-by: Changli Gao <xiaosuo@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-11-19tracing/events: Show real number in array fieldsSteven Rostedt1-0/+4
Currently we have in something like the sched_switch event: field:char prev_comm[TASK_COMM_LEN]; offset:12; size:16; signed:1; When a userspace tool such as perf tries to parse this, the TASK_COMM_LEN is meaningless. This is done because the TRACE_EVENT() macro simply uses a #len to show the string of the length. When the length is an enum, we get a string that means nothing for tools. By adding a static buffer and a mutex to protect it, we can store the string into that buffer with snprintf and show the actual number. Now we get: field:char prev_comm[16]; offset:12; size:16; signed:1; Something much more useful. Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
2010-11-19Merge branch 'common/fbdev-mipi' of master.kernel.org:/pub/scm/linux/kernel/git/lethal/sh-2.6Paul Mundt37-331/+540
2010-11-18nl80211/mac80211: Report signal averageBruno Randolf1-0/+2
Extend nl80211 to report an exponential weighted moving average (EWMA) of the signal value. Since the signal value usually fluctuates between different packets, an average can be more useful than the value of the last packet. This uses the recently added generic EWMA library function. Signed-off-by: Bruno Randolf <br1@einfach.org> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2010-11-18lib: Add generic exponentially weighted moving average (EWMA) functionBruno Randolf1-0/+32
This adds generic functions for calculating Exponentially Weighted Moving Averages (EWMA). This implementation makes use of a structure which keeps the EWMA parameters and a scaled up internal representation to reduce rounding errors. The original idea for this implementation came from the rt2x00 driver (rt2x00link.c). I would like to use it in several places in the mac80211 and ath5k code and I hope it can be useful in many other places in the kernel code. Signed-off-by: Bruno Randolf <br1@einfach.org> Reviewed-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2010-11-18Merge branch 'perf/core' of git://git.kernel.org/pub/scm/linux/kernel/git/frederic/random-tracing into perf/coreIngo Molnar4-7/+21
2010-11-18net: move definitions of BPF_S_* to net/core/filter.cChangli Gao1-48/+0
BPF_S_* are used internally, should not be exposed to the others. Signed-off-by: Changli Gao <xiaosuo@gmail.com> Acked-by: Eric Dumazet <eric.dumazet@gmail.com> Acked-by: Hagen Paul Pfeifer <hagen@jauu.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-11-18hardirq.h: needs sched.h if using BKLLinus Torvalds1-0/+1
This really isn't the right thing to do, and strictly speaking we should have the BKL depth count in the thread info right next to the preempt count. The two really do go together. However, since that would involve a patch to all architectures, and the BKL is finally going away, it's simply not worth the effort to do the RightThing(tm). Just re-instate the <linux/sched.h> include that we used to get accidentally from the smp_lock.h one. This is all fallout from the same old "BKL: remove extraneous #include <smp_lock.h>" commit. Reported-by: Ingo Molnar <mingo@elte.hu> Tested-by: Randy Dunlap <randy.dunlap@oracle.com> Cc: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-11-18bonding: IGMP handling cleanupEric Dumazet1-1/+1
Instead of iterating in_dev->mc_list from bonding driver, its better to call a helper function provided by igmp.c Details of implementation (locking) are private to igmp code. ip_mc_rejoin_group(struct ip_mc_list *im) becomes ip_mc_rejoin_groups(struct in_device *in_dev); Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-11-18tracing: Remove useless syscall ftrace_event_call declarationFrederic Weisbecker1-4/+0
It is defined right after, which makes the declaration completely useless. Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Li Zefan <lizf@cn.fujitsu.com> Cc: Jason Baron <jbaron@redhat.com>
2010-11-18tracing: Allow syscall trace events for non privileged usersFrederic Weisbecker2-2/+12
As for the raw syscalls events, individual syscall events won't leak system wide information on task bound tracing. Allow non privileged users to use them in such workflow. Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Li Zefan <lizf@cn.fujitsu.com> Cc: Jason Baron <jbaron@redhat.com>
2010-11-18tracing: New macro to set up initial event flags valueFrederic Weisbecker1-0/+4
This introduces the new TRACE_EVENT_FLAGS() macro in order to set up initial event flags value. This macro must simply follow the definition of a trace event and take the event name and the flag value as parameters: TRACE_EVENT(my_event, ..... .... ); TRACE_EVENT_FLAGS(my_event, 1) This will set up 1 as the initial my_event->flags value. Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Li Zefan <lizf@cn.fujitsu.com> Cc: Jason Baron <jbaron@redhat.com>
2010-11-18tracing: New flag to allow non privileged users to use a trace eventFrederic Weisbecker1-0/+2
This adds a new trace event internal flag that allows them to be used in perf by non privileged users in case of task bound tracing. This is desired for syscalls tracepoint because they don't leak global system informations, like some other tracepoints. Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Li Zefan <lizf@cn.fujitsu.com> Cc: Jason Baron <jbaron@redhat.com>
2010-11-18x86: Eliminate bp argument from the stack tracing routinesSoeren Sandmann Pedersen1-1/+3
The various stack tracing routines take a 'bp' argument in which the caller is supposed to provide the base pointer to use, or 0 if doesn't have one. Since bp is garbage whenever CONFIG_FRAME_POINTER is not defined, this means all callers in principle should either always pass 0, or be conditional on CONFIG_FRAME_POINTER. However, there are only really three use cases for stack tracing: (a) Trace the current task, including IRQ stack if any (b) Trace the current task, but skip IRQ stack (c) Trace some other task In all cases, if CONFIG_FRAME_POINTER is not defined, bp should just be 0. If it _is_ defined, then - in case (a) bp should be gotten directly from the CPU's register, so the caller should pass NULL for regs, - in case (b) the caller should should pass the IRQ registers to dump_trace(), - in case (c) bp should be gotten from the top of the task's stack, so the caller should pass NULL for regs. Hence, the bp argument is not necessary because the combination of task and regs is sufficient to determine an appropriate value for bp. This patch introduces a new inline function stack_frame(task, regs) that computes the desired bp. This function is then called from the two versions of dump_stack(). Signed-off-by: Soren Sandmann <ssp@redhat.com> Acked-by: Steven Rostedt <rostedt@goodmis.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Arjan van de Ven <arjan@infradead.org>, Cc: Frederic Weisbecker <fweisbec@gmail.com>, Cc: Arnaldo Carvalho de Melo <acme@redhat.com>, LKML-Reference: <m3oc9rop28.fsf@dhcp-100-3-82.bos.redhat.com>> Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
2010-11-18x86: Add RO/NX protection for loadable kernel modulesmatthieu castet1-1/+10
This patch is a logical extension of the protection provided by CONFIG_DEBUG_RODATA to LKMs. The protection is provided by splitting module_core and module_init into three logical parts each and setting appropriate page access permissions for each individual section: 1. Code: RO+X 2. RO data: RO+NX 3. RW data: RW+NX In order to achieve proper protection, layout_sections() have been modified to align each of the three parts mentioned above onto page boundary. Next, the corresponding page access permissions are set right before successful exit from load_module(). Further, free_module() and sys_init_module have been modified to set module_core and module_init as RW+NX right before calling module_free(). By default, the original section layout and access flags are preserved. When compiled with CONFIG_DEBUG_SET_MODULE_RONX=y, the patch will page-align each group of sections to ensure that each page contains only one type of content and will enforce RO/NX for each group of pages. -v1: Initial proof-of-concept patch. -v2: The patch have been re-written to reduce the number of #ifdefs and to make it architecture-agnostic. Code formatting has also been corrected. -v3: Opportunistic RO/NX protection is now unconditional. Section page-alignment is enabled when CONFIG_DEBUG_RODATA=y. -v4: Removed most macros and improved coding style. -v5: Changed page-alignment and RO/NX section size calculation -v6: Fixed comments. Restricted RO/NX enforcement to x86 only -v7: Introduced CONFIG_DEBUG_SET_MODULE_RONX, added calls to set_all_modules_text_rw() and set_all_modules_text_ro() in ftrace -v8: updated for compatibility with linux 2.6.33-rc5 -v9: coding style fixes -v10: more coding style fixes -v11: minor adjustments for -tip -v12: minor adjustments for v2.6.35-rc2-tip -v13: minor adjustments for v2.6.37-rc1-tip Signed-off-by: Siarhei Liakh <sliakh.lkml@gmail.com> Signed-off-by: Xuxian Jiang <jiang@cs.ncsu.edu> Acked-by: Arjan van de Ven <arjan@linux.intel.com> Reviewed-by: James Morris <jmorris@namei.org> Signed-off-by: H. Peter Anvin <hpa@zytor.com> Cc: Andi Kleen <ak@muc.de> Cc: Rusty Russell <rusty@rustcorp.com.au> Cc: Stephen Rothwell <sfr@canb.auug.org.au> Cc: Dave Jones <davej@redhat.com> Cc: Kees Cook <kees.cook@canonical.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> LKML-Reference: <4CE2F914.9070106@free.fr> [ minor cleanliness edits, -v14: build failure fix ] Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-11-18sched: Add sysctl_sched_shares_windowPaul Turner1-0/+1
Introduce a new sysctl for the shares window and disambiguate it from sched_time_avg. A 10ms window appears to be a good compromise between accuracy and performance. Signed-off-by: Paul Turner <pjt@google.com> Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> LKML-Reference: <20101115234938.112173964@google.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-11-18sched: Rewrite tg_shares_up)Peter Zijlstra1-2/+0
By tracking a per-cpu load-avg for each cfs_rq and folding it into a global task_group load on each tick we can rework tg_shares_up to be strictly per-cpu. This should improve cpu-cgroup performance for smp systems significantly. [ Paul: changed to use queueing cfs_rq + bug fixes ] Signed-off-by: Paul Turner <pjt@google.com> Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> LKML-Reference: <20101115234937.580480400@google.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-11-18sched: Simplify cpu-hot-unplug task migrationPeter Zijlstra1-3/+0
While discussing the need for sched_idle_next(), Oleg remarked that since try_to_wake_up() ensures sleeping tasks will end up running on a sane cpu, we can do away with migrate_live_tasks(). If we then extend the existing hack of migrating current from CPU_DYING to migrating the full rq worth of tasks from CPU_DYING, the need for the sched_idle_next() abomination disappears as well, since idle will be the only possible thread left after the migration thread stops. This greatly simplifies the hot-unplug task migration path, as can be seen from the resulting code reduction (and about half the new lines are comments). Suggested-by: Oleg Nesterov <oleg@redhat.com> Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> LKML-Reference: <1289851597.2109.547.camel@laptop> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-11-18Merge commit 'v2.6.37-rc2' into sched/coreIngo Molnar284-3881/+6309
Merge reason: Move to a .37-rc base. Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-11-18Merge branch 'perf/urgent' of git://git.kernel.org/pub/scm/linux/kernel/git/frederic/random-tracing into perf/urgentIngo Molnar1-0/+4
2010-11-18x86, nmi_watchdog: Remove all stub function calls from old nmi_watchdogDon Zickus1-2/+0
Now that the bulk of the old nmi_watchdog is gone, remove all the stub variables and hooks associated with it. This touches lots of files mainly because of how the io_apic nmi_watchdog was implemented. Now that the io_apic nmi_watchdog is forever gone, remove all its fingers. Most of this code was not being exercised by virtue of nmi_watchdog != NMI_IO_APIC, so there shouldn't be anything to risky here. Signed-off-by: Don Zickus <dzickus@redhat.com> Cc: fweisbec@gmail.com Cc: gorcunov@openvz.org LKML-Reference: <1289578944-28564-3-git-send-email-dzickus@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-11-18x86, nmi_watchdog: Remove the old nmi_watchdogDon Zickus1-5/+1
Now that we have a new nmi_watchdog that is more generic and sits on top of the perf subsystem, we really do not need the old nmi_watchdog any more. In addition, the old nmi_watchdog doesn't really work if you are using the default clocksource, hpet. The old nmi_watchdog code relied on local apic interrupts to determine if the cpu is still alive. With hpet as the clocksource, these interrupts don't increment any more and the old nmi_watchdog triggers false postives. This piece removes the old nmi_watchdog code and stubs out any variables and functions calls. The stubs are the same ones used by the new nmi_watchdog code, so it should be well tested. Signed-off-by: Don Zickus <dzickus@redhat.com> Cc: fweisbec@gmail.com Cc: gorcunov@openvz.org LKML-Reference: <1289578944-28564-2-git-send-email-dzickus@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
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