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2006-04-02Merge git://git.kernel.org/pub/scm/linux/kernel/git/bunk/trivialLinus Torvalds
* git://git.kernel.org/pub/scm/linux/kernel/git/bunk/trivial: (48 commits) Documentation: fix minor kernel-doc warnings BUG_ON() Conversion in drivers/net/ BUG_ON() Conversion in drivers/s390/net/lcs.c BUG_ON() Conversion in mm/slab.c BUG_ON() Conversion in mm/highmem.c BUG_ON() Conversion in kernel/signal.c BUG_ON() Conversion in kernel/signal.c BUG_ON() Conversion in kernel/ptrace.c BUG_ON() Conversion in ipc/shm.c BUG_ON() Conversion in fs/freevxfs/ BUG_ON() Conversion in fs/udf/ BUG_ON() Conversion in fs/sysv/ BUG_ON() Conversion in fs/inode.c BUG_ON() Conversion in fs/fcntl.c BUG_ON() Conversion in fs/dquot.c BUG_ON() Conversion in md/raid10.c BUG_ON() Conversion in md/raid6main.c BUG_ON() Conversion in md/raid5.c Fix minor documentation typo BFP->BPF in Documentation/networking/tuntap.txt ...
2006-04-02Merge master.kernel.org:/pub/scm/linux/kernel/git/mchehab/v4l-dvbLinus Torvalds
* master.kernel.org:/pub/scm/linux/kernel/git/mchehab/v4l-dvb: (49 commits) V4L/DVB (3667b): cpia2: fix function prototype V4L/DVB (3702): Make msp3400 routing defines more consistent V4L/DVB (3700): Remove obsolete commands from tvp5150.c V4L/DVB (3697): More msp3400 and bttv fixes V4L/DVB (3696): Previous change for cx2341X boards broke the remote support V4L/DVB (3693): Fix msp3400c and bttv stereo/mono/bilingual detection/handling V4L/DVB (3692): Keep experimental SLICED_VBI defines under an #if 0 V4L/DVB (3689): Kconfig: fix VP-3054 Secondary I2C Bus build configuration menu dependencies V4L/DVB (3673): Fix budget-av CAM reset V4L/DVB (3672): Fix memory leak in dvr open V4L/DVB (3671): New module parameter 'tv_standard' (dvb-ttpci driver) V4L/DVB (3670): Fix typo in comment V4L/DVB (3669): Configurable dma buffer size for saa7146-based budget dvb cards V4L/DVB (3653h): Move usb v4l docs into Documentation/video4linux V4L/DVB (3667a): Fix SAP + stereo mode at msp3400 V4L/DVB (3666): Remove trailing newlines V4L/DVB (3665): Add new NEC uPD64031A and uPD64083 i2c drivers V4L/DVB (3663): Fix msp3400c wait time and better audio mode fallbacks V4L/DVB (3662): Don't set msp3400c-non-existent register V4L/DVB (3661): Add wm8739 stereo audio ADC i2c driver ...
2006-04-02Merge master.kernel.org:/pub/scm/linux/kernel/git/brodo/pcmcia-2.6Linus Torvalds
* master.kernel.org:/pub/scm/linux/kernel/git/brodo/pcmcia-2.6: (33 commits) [PATCH] pcmcia: declare pccard_iodyn_ops (fix m8xx_pcmcia.c compilation error) [PATCH] pcmcia: fix pcmcia_device_remove oops [PATCH] pcmcia: Add support for Possio GCC AKA PCMCIA Siemens MC45 [PATCH] pcmcia: pseudo device handling update [PATCH] pcmcia: convert DEV_OK to pcmcia_dev_present [PATCH] pcmcia: use bitfield instead of p_state and state [PATCH] pcmcia: remove unused p_dev->state flags [PATCH] pcmcia: make pcmcia_release_{io,irq} static [PATCH] pcmcia: add return value to _config() functions [PATCH] pcmcia: remove dev_link_t and client_handle_t indirection [PATCH] pcmcia: embed dev_link_t into struct pcmcia_device [PATCH] pcmcia: rename pcmcia_device.state [PATCH] pcmcia: remove unneeded Vcc pseudo setting [PATCH] pcmcia: remove export of pcmcia_release_configuration [PATCH] pcmcia: default suspend and resume handling [PATCH] pcmcia: convert remaining users of pcmcia_release_io and _irq [PATCH] pcmcia: add pcmcia_disable_device [PATCH] serial_cs: add Merlin U630 IDs [PATCH] pcmcia: AT91RM9200 Compact Flash driver [PATCH] pcmcia: socket.functions starts with 1 ...
2006-04-02Merge master.kernel.org:/pub/scm/linux/kernel/git/dtor/inputLinus Torvalds
* master.kernel.org:/pub/scm/linux/kernel/git/dtor/input: (26 commits) Input: add support for Braille devices Input: synaptics - limit rate to 40pps on Toshiba Protege M300 Input: gamecon - add SNES mouse support Input: make modalias code respect allowed buffer size Input: convert /proc handling to seq_file Input: limit attributes' output to PAGE_SIZE Input: gameport - fix memory leak Input: serio - fix memory leak Input: zaurus keyboard driver updates Input: i8042 - fix logic around pnp_register_driver() Input: ns558 - fix logic around pnp_register_driver() Input: pcspkr - separate device and driver registration Input: atkbd - allow disabling on X86_PC (if EMBEDDED) Input: atkbd - disable softrepeat for dumb keyboards Input: atkbd - fix complaints about 'releasing unknown key 0x7f' Input: HID - fix duplicate key mapping for Logitech UltraX remote Input: use kzalloc() throughout the code Input: fix input_free_device() implementation Input: initialize serio and gameport at subsystem level Input: uinput - semaphore to mutex conversion ...
2006-04-02Merge master.kernel.org:/pub/scm/linux/kernel/git/paulus/powerpcLinus Torvalds
* master.kernel.org:/pub/scm/linux/kernel/git/paulus/powerpc: [PATCH] powerpc: iSeries needs slb_initialize to be called powerpc: hook up the splice syscall [PATCH] powerpc/cell: compile fixes [PATCH] powerpc: trivial spelling fixes in fault.c [PATCH] powerpc/pseries: EEH Cleanup [PATCH] powerpc/pseries: misc lparcfg fixes [PATCH] powerpc/pseries: fix device name printing, again. [PATCH] powerpc: Extends HCALL interface for InfiniBand usage [PATCH] powerpc/pseries: Change H_StudlyCaps to H_SHOUTING_CAPS [PATCH] powerpc/pseries: print message if EEH recovery fails [PATCH] powerpc/pseries: mutex lock to serialize EEH event processing powerpc: converted embedded platforms to use new define_machine support powerpc: merge machine_check_exception between ppc32 & ppc64
2006-04-02Merge master.kernel.org:/pub/scm/linux/kernel/git/davem/sparc-2.6Linus Torvalds
* master.kernel.org:/pub/scm/linux/kernel/git/davem/sparc-2.6: [SPARC]: Wire up sys_sync_file_range() into syscall tables. [SPARC]: Wire up sys_splice() into the syscall tables. [SPARC64]: Update defconfig. [SPARC64]: Align address in huge_pte_alloc(). [SPARC64]: Document the instruction checks we do in do_sparc64_fault(). [SPARC64]: Make tsb_sync() mm comparison more precise.
2006-04-02Merge master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6Linus Torvalds
* master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6: [NET]: Fully fix the memory leaks in sys_accept(). [NETFILTER]: iptables 32bit compat layer [NETFILTER]: {ip,nf}_conntrack_netlink: fix expectation notifier unregistration [NETFILTER]: fix ifdef for connmark support in nf_conntrack_netlink [NETFILTER]: x_tables: unify IPv4/IPv6 multiport match [NETFILTER]: x_tables: unify IPv4/IPv6 esp match [NET]: Fix dentry leak in sys_accept(). [IPSEC]: Kill unused decap state structure [IPSEC]: Kill unused decap state argument [NET]: com90xx kmalloc fix [TG3]: Update driver version and reldate. [TG3]: Revert "Speed up SRAM access"
2006-04-02splice: add SPLICE_F_NONBLOCK flagLinus Torvalds
It doesn't make the splice itself necessarily nonblocking (because the actual file descriptors that are spliced from/to may block unless they have the O_NONBLOCK flag set), but it makes the splice pipe operations nonblocking. Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-04-02Documentation: fix minor kernel-doc warningsMartin Waitz
This patch updates the comments to match the actual code. Signed-off-by: Martin Waitz <tali@admingilde.org> Signed-off-by: Adrian Bunk <bunk@stusta.de>
2006-04-02Merge with git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6.gitAdrian Bunk
2006-04-02V4L/DVB (3702): Make msp3400 routing defines more consistentHans Verkuil
Renamed various msp3400 routing defines to be more consistent and less confusing. Esp. the MSP_DSP_OUT defines were confusing since it is really a DSP input. Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
2006-04-02V4L/DVB (3692): Keep experimental SLICED_VBI defines under an #if 0Hans Verkuil
The sliced VBI defines added in videodev2.h are removed since requires more discussion. Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
2006-04-02V4L/DVB (3666): Remove trailing newlinesHans Verkuil
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
2006-04-02V4L/DVB (3665): Add new NEC uPD64031A and uPD64083 i2c driversHans Verkuil
- Add support for the uPD64031A NEC Electronics Ghost Reduction i2c device - Add support for the uPD6408x NEC Electronics 3-Dimensional Y/C separation i2c device. Signed-off-by: Takahiro Adachi <tadachi@tadachi-net.com> Signed-off-by: Takeru Komoriya <komoriya@paken.org> Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
2006-04-02V4L/DVB (3610): Added the new routing commands to cx25840.Hans Verkuil
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
2006-04-02V4L/DVB (3608): Implement new routing commands in saa7127.cHans Verkuil
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
2006-04-02V4L/DVB (3607): Implement routing command for saa7115.cHans Verkuil
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
2006-04-02Input: add support for Braille devicesSamuel Thibault
- Add KEY_BRL_* input keys and K_BRL_* keycodes; - Add emulation of how braille keyboards usually combine braille dots to the console keyboard driver; - Add handling of unicode U+28xy diacritics. Signed-off-by: Samuel Thibault <samuel.thibault@ens-lyon.org> Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
2006-04-02Manual merge with Linus.Dmitry Torokhov
Conflicts: arch/powerpc/kernel/setup-common.c drivers/input/keyboard/hil_kbd.c drivers/input/mouse/hil_ptr.c
2006-04-01[PATCH] powerpc/pseries: EEH CleanupNathan Fontenot
This patch removes unnecessary exports, marks functions as static when possible, and simplifies some list-related code. Signed-off-by: Nathan Fontenot <nfont@austin.ibm.com> Signed-off-by: Linas Vepstas <linas@austin.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-04-01[PATCH] powerpc: Extends HCALL interface for InfiniBand usageHeiko J Schick
This extends the HCALL interface for InfiniBand usage. I've made the patch against the linux-2.6 git tree and Segher's patch: [PATCH] Change H_StudlyCaps to H_SHOUTING_CAPS We moved this into the common powerpc code based on comments we got after posting the first eHCA InfiniBand device driver patch. Signed-off-by: Heiko j Schick <schickhj@de.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-04-01[PATCH] powerpc/pseries: Change H_StudlyCaps to H_SHOUTING_CAPSSegher Boessenkool
Also cleans up some nearby whitespace problems. Signed-off-by: Segher Boessenkool <segher@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-04-01[NETFILTER]: iptables 32bit compat layerDmitry Mishin
This patch extends current iptables compatibility layer in order to get 32bit iptables to work on 64bit kernel. Current layer is insufficient due to alignment checks both in kernel and user space tools. Patch is for current net-2.6.17 with addition of move of ipt_entry_{match| target} definitions to xt_entry_{match|target}. Signed-off-by: Dmitry Mishin <dim@openvz.org> Acked-off-by: Kirill Korotaev <dev@openvz.org> Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2006-04-01[NETFILTER]: x_tables: unify IPv4/IPv6 multiport matchYasuyuki Kozakai
This unifies ipt_multiport and ip6t_multiport to xt_multiport. As a result, this addes support for inversion and port range match to IPv6 packets. Signed-off-by: Yasuyuki Kozakai <yasuyuki.kozakai@toshiba.co.jp> Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2006-04-01[NETFILTER]: x_tables: unify IPv4/IPv6 esp matchYasuyuki Kozakai
This unifies ipt_esp and ip6t_esp to xt_esp. Please note that now a user program needs to specify IPPROTO_ESP as protocol to use esp match with IPv6. This means that ip6tables requires '-p esp' like iptables. Signed-off-by: Yasuyuki Kozakai <yasuyuki.kozakai@toshiba.co.jp> Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2006-04-01[IPSEC]: Kill unused decap state structureHerbert Xu
This patch removes the *_decap_state structures which were previously used to share state between input/post_input. This is no longer needed. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
2006-04-01[IPSEC]: Kill unused decap state argumentHerbert Xu
This patch removes the decap_state argument from the xfrm input hook. Previously this function allowed the input hook to share state with the post_input hook. The latter has since been removed. The only purpose for it now is to check the encap type. However, it is easier and better to move the encap type check to the generic xfrm_rcv function. This allows us to get rid of the decap state argument altogether. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
2006-03-31[SPARC]: Wire up sys_sync_file_range() into syscall tables.David S. Miller
Signed-off-by: David S. Miller <davem@davemloft.net>
2006-03-31[SPARC]: Wire up sys_splice() into the syscall tables.David S. Miller
Signed-off-by: David S. Miller <davem@davemloft.net>
2006-03-31Merge master.kernel.org:/home/rmk/linux-2.6-armLinus Torvalds
* master.kernel.org:/home/rmk/linux-2.6-arm: [ARM] 3424/2: ixp23xx: fix uncompress.h for recent CRLF decompressor change [ARM] 3434/1: pxa i2s amsl define [ARM] 3425/1: xsc3: need to include pgtable-hwdef.h [ARM] Allow un-muxed syscalls to be available for everyone [ARM] 3420/1: Missing clobber in example code [ARM] nommu: fixups for the exception vectors [ARM] nommu: add nommu specific Kconfig and MMUEXT variable in Makefile [ARM] nommu: start-up code [ARM] nommu: MPU support in boot/compressed/head.S
2006-03-31Merge branch 'release' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6 * 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6: [IA64] Avoid "u64 foo : 32;" for gcc3 vs. gcc4 compatibility [IA64] Export cpu cache info by sysfs
2006-04-01Fix comments: s/granuality/granularity/Kalin KOZHUHAROV
I was grepping through the code and some `grep ganularity -R .` didn't catch what I thought. Then looking closer I saw the term "granuality" used in only four places (in comments) and granularity in many more places describing the same idea. Some other facts: dictionary.com does not know such a word define:granuality on google is not found (and pages for granuality are mostly related to patches to the kernel) it has not been discussed as a term on LKML, AFAICS (=Can Search) To be consistent, I think granularity should be used everywhere. Signed-off-by: Kalin KOZHUHAROV <kalin@thinrope.net> Signed-off-by: Adrian Bunk <bunk@stusta.de>
2006-03-31Merge master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6Linus Torvalds
* master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6: [NET]: Allow skb headroom to be overridden [TCP]: Kill unused extern decl for tcp_v4_hash_connecting() [NET]: add SO_RCVBUF comment [NET]: Deinline some larger functions from netdevice.h [DCCP]: Use NULL for pointers, comfort sparse. [DECNET]: Fix refcount
2006-03-31[PATCH] mutex: some cleanupsNicolas Pitre
Turn some macros into inline functions and add proper type checking as well as being more readable. Also a minor comment adjustment. Signed-off-by: Nicolas Pitre <nico@cam.org> Acked-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-03-31[PATCH] fs/namei.c: make lookup_hash() staticAdrian Bunk
As announced, lookup_hash() can now become static. Signed-off-by: Adrian Bunk <bunk@stusta.de> Cc: Christoph Hellwig <hch@lst.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-03-31[PATCH] fbcon: Fix big-endian bogosity in slow_imageblit()Antonino A. Daplas
The monochrome->color expansion routine that handles bitmaps which have (widths % 8) != 0 (slow_imageblit) produces corrupt characters in big-endian. This is caused by a bogus bit test in slow_imageblit(). Fix. This patch may deserve to go to the stable tree. The code has already been well tested in little-endian machines. It's only in big-endian where there is uncertainty and Herbert confirmed that this is the correct way to go. It should not introduce regressions. Signed-off-by: Antonino Daplas <adaplas@pol.net> Acked-by: Herbert Poetzl <herbert@13thfloor.at> Cc: <stable@kernel.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-03-31[PATCH] backlight: corgi_bl: Generalise to support other Sharp SL hardwareRichard Purdie
Generalise the Corgi backlight driver by moving the default intensity and limit mask settings into the platform specific data structure. This enables the driver to support other Zaurus hardware, specifically the SL-6000x (Tosa) model. Also change the spinlock to a mutex (the spinlock is overkill). Signed-off-by: Richard Purdie <rpurdie@rpsys.net> Signed-off-by: Antonino Daplas <adaplas@pol.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-03-31[PATCH] backlight: Backlight Class ImprovementsRichard Purdie
Backlight class attributes are currently easy to implement incorrectly. Moving certain handling into the backlight core prevents this whilst at the same time makes the drivers simpler and consistent. The following changes are included: The brightness attribute only sets and reads the brightness variable in the backlight_properties structure. The power attribute only sets and reads the power variable in the backlight_properties structure. Any framebuffer blanking events change a variable fb_blank in the backlight_properties structure. The backlight driver has only two functions to implement. One function is called when any of the above properties change (to update the backlight brightness), the second is called to return the current backlight brightness value. A new attribute "actual_brightness" is added to return this brightness as determined by the driver having combined all the above factors (and any driver/device specific factors). Additionally, the backlight core takes care of checking the maximum brightness is not exceeded and of turning off the backlight before device removal. The corgi backlight driver is updated to reflect these changes. Signed-off-by: Richard Purdie <rpurdie@rpsys.net> Signed-off-by: Antonino Daplas <adaplas@pol.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-03-31[PATCH] dcache: Add helper d_hash_and_lookupEric W. Biederman
It is very common to hash a dentry and then to call lookup. If we take fs specific hash functions into account the full hash logic can get ugly. Further full_name_hash as an inline function is almost 100 bytes on x86 so having a non-inline choice in some cases can measurably decrease code size. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-03-31[PATCH] pidhash: Refactor the pid hash tableEric W. Biederman
Simplifies the code, reduces the need for 4 pid hash tables, and makes the code more capable. In the discussions I had with Oleg it was felt that to a large extent the cleanup itself justified the work. With struct pid being dynamically allocated meant we could create the hash table entry when the pid was allocated and free the hash table entry when the pid was freed. Instead of playing with the hash lists when ever a process would attach or detach to a process. For myself the fact that it gave what my previous task_ref patch gave for free with simpler code was a big win. The problem is that if you hold a reference to struct task_struct you lock in 10K of low memory. If you do that in a user controllable way like /proc does, with an unprivileged but hostile user space application with typical resource limits of 1000 fds and 100 processes I can trigger the OOM killer by consuming all of low memory with task structs, on a machine wight 1GB of low memory. If I instead hold a reference to struct pid which holds a pointer to my task_struct, I don't suffer from that problem because struct pid is 2 orders of magnitude smaller. In fact struct pid is small enough that most other kernel data structures dwarf it, so simply limiting the number of referring data structures is enough to prevent exhaustion of low memory. This splits the current struct pid into two structures, struct pid and struct pid_link, and reduces our number of hash tables from PIDTYPE_MAX to just one. struct pid_link is the per process linkage into the hash tables and lives in struct task_struct. struct pid is given an indepedent lifetime, and holds pointers to each of the pid types. The independent life of struct pid simplifies attach_pid, and detach_pid, because we are always manipulating the list of pids and not the hash table. In addition in giving struct pid an indpendent life it makes the concept much more powerful. Kernel data structures can now embed a struct pid * instead of a pid_t and not suffer from pid wrap around problems or from keeping unnecessarily large amounts of memory allocated. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-03-31[PATCH] task: RCU protect task->usageEric W. Biederman
A big problem with rcu protected data structures that are also reference counted is that you must jump through several hoops to increase the reference count. I think someone finally implemented atomic_inc_not_zero(&count) to automate the common case. Unfortunately this means you must special case the rcu access case. When data structures are only visible via rcu in a manner that is not determined by the reference count on the object (i.e. tasks are visible until their zombies are reaped) there is a much simpler technique we can employ. Simply delaying the decrement of the reference count until the rcu interval is over. What that means is that the proc code that looks up a task and later wants to sleep can now do: rcu_read_lock(); task = find_task_by_pid(some_pid); if (task) { get_task_struct(task); } rcu_read_unlock(); The effect on the rest of the kernel is that put_task_struct becomes cheaper and immediate, and in the case where the task has been reaped it frees the task immediate instead of unnecessarily waiting an until the rcu interval is over. Cleanup of task_struct does not happen when its reference count drops to zero, instead cleanup happens when release_task is called. Tasks can only be looked up via rcu before release_task is called. All rcu protected members of task_struct are freed by release_task. Therefore we can move call_rcu from put_task_struct into release_task. And we can modify release_task to not immediately release the reference count but instead have it call put_task_struct from the function it gives to call_rcu. The end result: - get_task_struct is safe in an rcu context where we have just looked up the task. - put_task_struct() simplifies into its old pre rcu self. This reorganization also makes put_task_struct uncallable from modules as it is not exported but it does not appear to be called from any modules so this should not be an issue, and is trivially fixed. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-03-31[PATCH] resurrect __put_task_structAndrew Morton
This just got nuked in mainline. Bring it back because Eric's patches use it. Cc: "Eric W. Biederman" <ebiederm@xmission.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-03-31[PATCH] sched: activate SCHED BATCH expiredCon Kolivas
To increase the strength of SCHED_BATCH as a scheduling hint we can activate batch tasks on the expired array since by definition they are latency insensitive tasks. Signed-off-by: Con Kolivas <kernel@kolivas.org> Acked-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-03-31[PATCH] sched: cleanup task_activated()Con Kolivas
The activated flag in task_struct is used to track different sleep types and its usage is somewhat obfuscated. Convert the variable to an enum with more descriptive names without altering the function. Signed-off-by: Con Kolivas <kernel@kolivas.org> Acked-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-03-31[PATCH] sched: reduce overhead of calc_loadJack Steiner
Currently, count_active_tasks() calls both nr_running() & nr_interruptible(). Each of these functions does a "for_each_cpu" & reads values from the runqueue of each cpu. Although this is not a lot of instructions, each runqueue may be located on different node. Depending on the architecture, a unique TLB entry may be required to access each runqueue. Since there may be more runqueues than cpu TLB entries, a scan of all runqueues can trash the TLB. Each memory reference incurs a TLB miss & refill. In addition, the runqueue cacheline that contains nr_running & nr_uninterruptible may be evicted from the cache between the two passes. This causes unnecessary cache misses. Combining nr_running() & nr_interruptible() into a single function substantially reduces the TLB & cache misses on large systems. This should have no measureable effect on smaller systems. On a 128p IA64 system running a memory stress workload, the new function reduced the overhead of calc_load() from 605 usec/call to 324 usec/call. Signed-off-by: Jack Steiner <steiner@sgi.com> Acked-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-03-31[PATCH] hrtimer: create generic sleeperThomas Gleixner
The removal of the data field in the hrtimer structure enforces the embedding of the timer into another data structure. nanosleep now uses a private implementation of the most common used timer callback function (simple task wakeup). In order to avoid the reimplentation of such functionality all over the place a generic hrtimer_sleeper functionality is created. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-03-31[PATCH] LED: Add IDE disk activity LED triggerRichard Purdie
Add an LED trigger for IDE disk activity to the ide-disk driver. Signed-off-by: Richard Purdie <rpurdie@rpsys.net> Acked-by: Bartlomiej Zolnierkiewicz <B.Zolnierkiewicz@elka.pw.edu.pl> Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-03-31[PATCH] LED: add LED trigger tupportRichard Purdie
Add support for LED triggers to the LED subsystem. "Triggers" are events which change the state of an LED. Two kinds of trigger are available, simple ones which can be added to exising code with minimum disruption and complex ones for implementing new or more complex functionality. Signed-off-by: Richard Purdie <rpurdie@rpsys.net> Cc: Russell King <rmk@arm.linux.org.uk> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-03-31[PATCH] LED: add LED classRichard Purdie
Add the foundations of a new LEDs subsystem. This patch adds a class which presents LED devices within sysfs and allows their brightness to be controlled. Signed-off-by: Richard Purdie <rpurdie@rpsys.net> Cc: Russell King <rmk@arm.linux.org.uk> Cc: Greg KH <greg@kroah.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-03-31[PATCH] vt: add TIOCL_GETKMSGREDIRECTRafael J. Wysocki
Add TIOCL_GETKMSGREDIRECT needed by the userland suspend tool to get the current value of kmsg_redirect from the kernel so that it can save it and restore it after resume. Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Acked-by: Pavel Machek <pavel@suse.cz> Cc: Michael Kerrisk <mtk-manpages@gmx.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>