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2006-01-11[PATCH] uninline capable()Ingo Molnar1-0/+12
Uninline capable(). Saves 2K of kernel text on a generic .config, and 1K on a tiny config. In addition it makes the use of capable more consistent between CONFIG_SECURITY and !CONFIG_SECURITY Signed-off-by: Ingo Molnar <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2006-01-11[PATCH] kprobes: fix unloading of self probed moduleKeshavamurthy Anil S1-10/+32
When a kprobes modules is written in such a way that probes are inserted on itself, then unload of that moudle was not possible due to reference couning on the same module. The below patch makes a check and incrementes the module refcount only if it is not a self probed module. We need to allow modules to probe themself for kprobes performance measurements This patch has been tested on several x86_64, ppc64 and IA64 architectures. Signed-off-by: Anil S Keshavamurthy <anil.s.keshavamurthy> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2006-01-11[PATCH] fix/simplify mutex debugging codeDavid Woodhouse1-2/+3
Let's switch mutex_debug_check_no_locks_freed() to take (addr, len) as arguments instead, since all its callers were just calculating the 'to' address for themselves anyway... (and sometimes doing so badly). Signed-off-by: David Woodhouse <[email protected]> Acked-by: Ingo Molnar <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2006-01-10[PATCH] mutex: trivial whitespace cleanupsIngo Molnar2-5/+1
Signed-off-by: Ingo Molnar <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2006-01-10[PATCH] mark mutex_lock*() as might_sleep()Ingo Molnar1-0/+2
Mark mutex_lock() and mutex_lock_interruptible() as might_sleep() functions. Signed-off-by: Ingo Molnar <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2006-01-10[PATCH] fix i386 mutex fastpath on FRAME_POINTER && !DEBUG_MUTEXESIngo Molnar1-9/+0
Call the mutex slowpath more conservatively - e.g. FRAME_POINTERS can change the calling convention, in which case a direct branch to the slowpath becomes illegal. Bug found by Hugh Dickins. Signed-off-by: Ingo Molnar <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2006-01-10[PATCH] remove unnecessary asm/mutex.h from kernel/mutex-debug.cIngo Molnar1-2/+0
Remove unnecessary (and incorrect) inclusion of asm/mutex.h, pointed out by David Howells. Signed-off-by: Ingo Molnar <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2006-01-10[PATCH] rcu: fix hotplug-cpu ->donelist leakOleg Nesterov1-1/+2
Pointed out by Srivatsa Vaddagiri <[email protected]>. rcu_do_batch() stops after processing maxbatch callbacks on ->donelist leaving rcu_tasklet in TASKLET_STATE_SCHED state. If CPU_DEAD event happens remaining ->donelist entries are lost, rcu_offline_cpu() kills this tasklet. With this patch ->donelist migrates along with ->curlist and ->nxtlist to the current cpu. Compile tested. Signed-off-by: Oleg Nesterov <[email protected]> Acked-by: Paul E. McKenney <[email protected]> Cc: Srivatsa Vaddagiri <[email protected]> Cc: Dipankar Sarma <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2006-01-10[PATCH] rcu: join rcu_ctrlblk and rcu_stateOleg Nesterov1-44/+38
This patch moves rcu_state into the rcu_ctrlblk. I think there are no reasons why we should have 2 different variables to control rcu state. Every user of rcu_state has also "rcu_ctrlblk *rcp" in the parameter list. Signed-off-by: Oleg Nesterov <[email protected]> Acked-by: Paul E. McKenney <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2006-01-10[PATCH] kernel/resource.c: __check_region(): remove pointless __deprecatedAdrian Bunk1-1/+1
If a __deprecated is desired it should go to the prototype in the header (where it currently isn't). But at this place it's pointless. Signed-off-by: Adrian Bunk <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2006-01-10[PATCH] Decrease number of pointer derefs in exit.cJesper Juhl1-16/+21
Decrease the number of pointer derefs in kernel/exit.c Benefits of the patch: - Fewer pointer dereferences should make the code slightly faster. - Size of generated code is smaller - improved readability Signed-off-by: Jesper Juhl <[email protected]> Acked-by: Ingo Molnar <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2006-01-10[PATCH] Kprobes: conversion from kcalloc to kzallocKeshavamurthy Anil S1-1/+1
Signed-of-by: Anil S Keshavamurthy <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2006-01-10[PATCH] kprobes: fix build breakageAnanth N Mavinakayanahalli1-2/+2
The following patch (against 2.6.15-rc5-mm3) fixes a kprobes build break due to changes introduced in the kprobe locking in 2.6.15-rc5-mm3. In addition, the patch reverts back the open-coding of kprobe_mutex. Signed-off-by: Ananth N Mavinakayanahalli <[email protected]> Acked-by: Anil S Keshavamurthy <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2006-01-10[PATCH] kprobes: arch_remove_kprobeAnil S Keshavamurthy1-3/+1
Currently arch_remove_kprobes() is only implemented/required for x86_64 and powerpc. All other architecture like IA64, i386 and sparc64 implementes a dummy function which is being called from arch independent kprobes.c file. This patch removes the dummy functions and replaces it with #define arch_remove_kprobe(p, s) do { } while(0) Signed-off-by: Anil S Keshavamurthy <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2006-01-10[PATCH] kprobes-changed-from-using-spinlock-to-mutex fixKeshavamurthy Anil S1-14/+18
Based on some feedback from Oleg Nesterov, I have made few changes to previously posted patch. Signed-off-by: Anil S Keshavamurthy <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2006-01-10[PATCH] kprobes: changed from using spinlock to mutexAnil S Keshavamurthy1-48/+43
Since Kprobes runtime exception handlers is now lock free as this code path is now using RCU to walk through the list, there is no need for the register/unregister{_kprobe} to use spin_{lock/unlock}_isr{save/restore}. The serialization during registration/unregistration is now possible using just a mutex. In the above process, this patch also fixes a minor memory leak for x86_64 and powerpc. Signed-off-by: Anil S Keshavamurthy <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2006-01-10[PATCH] kprobes: enable funcions only for required archAnil S Keshavamurthy1-0/+2
Kernel/kprobes.c defines get_insn_slot() and free_insn_slot() which are currently required _only_ for x86_64 and powerpc (which has no-exec support). FYI, get{free}_insn_slot() functions manages the memory page which is mapped as executable, required for instruction emulation. This patch moves those two functions under __ARCH_WANT_KPROBES_INSN_SLOT and defines __ARCH_WANT_KPROBES_INSN_SLOT in arch specific kprobes.h file. Signed-off-by: Anil S Keshavamurthy <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2006-01-10[PATCH] Remove getnstimestamp()Matt Helsley1-22/+0
Remove getnstimestamp() in favor of ktime.h's ktime_get_ts() Signed-off-by: Matt Helsley <[email protected]> Cc: john stultz <[email protected]> Cc: Thomas Gleixner <[email protected]> Cc: Ingo Molnar <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2006-01-10[PATCH] Export ktime_get_ts()Matt Helsley1-0/+1
This series removes the getnstimestamp() function from kernel/time.c in favor of kernel/hrtimer.c's ktime_get_ts() function which currently does exactly the same thing: retrieves a high-resolution (ns) timespec structure and performs the wall_to_monotonic adjustment. This patch: Export ktime_get_ts() to be used as a timestamp function since it uses getnstimefoday() and does the wall_to_monotonic adjustment. Signed-off-by: Matt Helsley <[email protected]> Cc: john stultz <[email protected]> Cc: Thomas Gleixner <[email protected]> Cc: Ingo Molnar <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2006-01-10[PATCH] hrtimer: convert posix timers completelyThomas Gleixner1-582/+135
- convert posix-timers.c to use hrtimers - remove the now obsolete abslist code Signed-off-by: Thomas Gleixner <[email protected]> Signed-off-by: Ingo Molnar <[email protected]> Signed-off-by: Miklos Szeredi <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2006-01-10[PATCH] hrtimer: switch clock_nanosleep to hrtimer nanosleep APIThomas Gleixner2-133/+41
Switch clock_nanosleep to use the new nanosleep functions in hrtimer.c Signed-off-by: Thomas Gleixner <[email protected]> Signed-off-by: Ingo Molnar <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2006-01-10[PATCH] hrtimer: switch sys_nanosleep to hrtimerThomas Gleixner2-56/+14
convert sys_nanosleep() to use hrtimer_nanosleep() Signed-off-by: Thomas Gleixner <[email protected]> Signed-off-by: Ingo Molnar <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2006-01-10[PATCH] hrtimer: create hrtimer nanosleep APIThomas Gleixner1-0/+127
introduce the hrtimer_nanosleep() and hrtimer_nanosleep_real() APIs. Not yet used by any code. Signed-off-by: Thomas Gleixner <[email protected]> Signed-off-by: Ingo Molnar <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2006-01-10[PATCH] hrtimer: switch itimers to hrtimerThomas Gleixner3-59/+55
switch itimers to a hrtimers-based implementation Signed-off-by: Thomas Gleixner <[email protected]> Signed-off-by: Ingo Molnar <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2006-01-10[PATCH] hrtimer: hrtimer core codeThomas Gleixner3-1/+682
hrtimer subsystem core. It is initialized at bootup and expired by the timer interrupt, but is otherwise not utilized by any other subsystem yet. Signed-off-by: Thomas Gleixner <[email protected]> Signed-off-by: Ingo Molnar <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2006-01-10[PATCH] hrtimer: introduce nsec_t type and conversion functionsThomas Gleixner1-0/+36
- introduce the nsec_t type - basic nsec conversion routines: timespec_to_ns(), timeval_to_ns(), ns_to_timespec(), ns_to_timeval(). Signed-off-by: Thomas Gleixner <[email protected]> Signed-off-by: Ingo Molnar <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2006-01-10[PATCH] hrtimer: validate timespec of do_sys_settimeofdayThomas Gleixner1-0/+3
Check if the timespec which is provided from user space is normalized. Signed-off-by: Thomas Gleixner <[email protected]> Signed-off-by: Ingo Molnar <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2006-01-10[PATCH] hrtimer: create and use timespec_valid macroThomas Gleixner1-3/+2
add timespec_valid(ts) [returns false if the timespec is denorm] Signed-off-by: Thomas Gleixner <[email protected]> Signed-off-by: Ingo Molnar <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2006-01-10[PATCH] hrtimer: make clockid_t arguments constThomas Gleixner2-35/+43
add const arguments to the posix-timers.h API functions Signed-off-by: Thomas Gleixner <[email protected]> Signed-off-by: Ingo Molnar <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2006-01-10[PATCH] hrtimer: export deinlined mktimeAndrew Morton1-0/+2
This is now uninlined, but some modules use it. Make it a non-GPL export, since the inlined mktime() was also available that way. Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]> Signed-off-by: Thomas Gleixner <[email protected]> Signed-off-by: Ingo Molnar <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2006-01-10[PATCH] hrtimer: clean up mktime and make arguments constIngo Molnar1-6/+9
add 'const' to mktime arguments, and clean it up a bit Signed-off-by: Ingo Molnar <[email protected]> Signed-off-by: Thomas Gleixner <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2006-01-10[PATCH] hrtimer: deinline mktime and set_normalized_timespecThomas Gleixner1-0/+61
mktime() and set_normalized_timespec() are large inline functions used in many places: deinline them. From: George Anzinger, off-by-1 bugfix Signed-off-by: Thomas Gleixner <[email protected]> Signed-off-by: Ingo Molnar <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2006-01-10[PATCH] hrtimer: remove duplicate div_long_long_rem implementationThomas Gleixner1-9/+1
make posix-timers.c use the generic calc64.h facility Signed-off-by: Thomas Gleixner <[email protected]> Signed-off-by: Ingo Molnar <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2006-01-10[PATCH] common compat_sys_timer_createChristoph Hellwig1-2/+18
The comment in compat.c is wrong, every architecture provides a get_compat_sigevent() for the IPC compat code already. This basically moves the x86_64 version to common code and removes all the others. Signed-off-by: Christoph Hellwig <[email protected]> Acked-by: Paul Mackerras <[email protected]> Cc: Arnd Bergmann <[email protected]> Cc: Benjamin Herrenschmidt <[email protected]> Cc: Martin Schwidefsky <[email protected]> Cc: "David S. Miller" <[email protected]> Acked-by: Andi Kleen <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2006-01-10[PATCH] kdump: read previous kernel's memoryVivek Goyal2-65/+0
- Moving the crash_dump.c file to arch dependent part as kmap_atomic_pfn is specific to i386 and highmem may not exist in other archs. - Use ioremap for x86_64 to map the previous kernel memory. - In copy_oldmem_page(), we now directly copy to the user/kernel buffer and avoid the unneccesary copy to a kmalloc'd page. Signed-off-by: Rachita Kothiyal <[email protected]> Signed-off-by: Vivek Goyal <[email protected]> Cc: Andi Kleen <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2006-01-10[PATCH] kdump: save registers early (inline functions)Vivek Goyal1-1/+3
- If system panics then cpu register states are captured through funciton crash_get_current_regs(). This is not a inline function hence a stack frame is pushed on to the stack and then cpu register state is captured. Later this frame is popped and new frames are pushed (machine_kexec). - In theory this is not very right as we are capturing register states for a frame and that frame is no more valid. This seems to have created back trace problems for ppc64. - This patch fixes it up. The very first thing it does after entering crash_kexec() is to capture the register states. Anyway we don't want the back trace beyond crash_kexec(). crash_get_current_regs() has been made inline - crash_setup_regs() is the top architecture dependent function which should be responsible for capturing the register states as well as to do some architecture dependent tricks. For ex. fixing up ss and esp for i386. crash_setup_regs() has also been made inline to ensure no new call frame is pushed onto stack. Signed-off-by: Vivek Goyal <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2006-01-10[PATCH] kdump: export per cpu crash notes pointer through sysfsVivek Goyal1-13/+0
- Kexec on panic functionality allocates memory for saving cpu registers in case of system crash event. Address of this allocated memory needs to be exported to user space, which is used by kexec-tools. - Previously, a single /sys/kernel/crash_notes entry was being exported as memory allocated was a single continuous array. Now memory allocation being dyanmic and per cpu based, address of per cpu buffer is exported through "/sys/devices/system/cpu/cpuX/crash_notes" Signed-off-by: Vivek Goyal <[email protected]> Cc: Greg KH <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2006-01-10[PATCH] kdump: dynamic per cpu allocation of memory for saving cpu registersVivek Goyal1-0/+16
- In case of system crash, current state of cpu registers is saved in memory in elf note format. So far memory for storing elf notes was being allocated statically for NR_CPUS. - This patch introduces dynamic allocation of memory for storing elf notes. It uses alloc_percpu() interface. This should lead to better memory usage. - Introduced based on Andi Kleen's and Eric W. Biederman's suggestions. - This patch also moves memory allocation for elf notes from architecture dependent portion to architecture independent portion. Now crash_notes is architecture independent. The whole idea is that size of memory to be allocated per cpu (MAX_NOTE_BYTES) can be architecture dependent and allocation of this memory can be architecture independent. Signed-off-by: Vivek Goyal <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2006-01-10[PATCH] Remove set_fs() in stop_machine()[email protected]1-5/+1
) From: Brian Gerst <[email protected]> Call sched_setscheduler() directly instead. Signed-off-by: Brian Gerst <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2006-01-09Merge master.kernel.org:/pub/scm/linux/kernel/git/mingo/mutex-2.6Linus Torvalds9-6/+975
2006-01-09[PATCH] rcu: don't set ->next_pending in rcu_start_batch()Oleg Nesterov1-7/+4
I think it is better to set ->next_pending in the caller, when it is needed. This saves one parameter, and this coincides with cpu_quiet() beahaviour, which sets ->completed = ->cur itself. Signed-off-by: Oleg Nesterov <[email protected]> Acked-by: Paul E. McKenney <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2006-01-09[PATCH] mutex subsystem, semaphore to mutex: VFS, ->i_semJes Sorensen1-5/+5
This patch converts the inode semaphore to a mutex. I have tested it on XFS and compiled as much as one can consider on an ia64. Anyway your luck with it might be different. Modified-by: Ingo Molnar <[email protected]> (finished the conversion) Signed-off-by: Jes Sorensen <[email protected]> Signed-off-by: Ingo Molnar <[email protected]>
2006-01-09[PATCH] mutex subsystem, more debugging codeIngo Molnar2-0/+6
more mutex debugging: check for held locks during memory freeing, task exit, enable sysrq printouts, etc. Signed-off-by: Ingo Molnar <[email protected]> Signed-off-by: Arjan van de Ven <[email protected]>
2006-01-09[PATCH] mutex subsystem, debugging codeIngo Molnar4-0/+603
mutex implementation - add debugging code. Signed-off-by: Ingo Molnar <[email protected]> Signed-off-by: Arjan van de Ven <[email protected]>
2006-01-09[PATCH] mutex subsystem, coreIngo Molnar3-1/+361
mutex implementation, core files: just the basic subsystem, no users of it. Signed-off-by: Ingo Molnar <[email protected]> Signed-off-by: Arjan van de Ven <[email protected]>
2006-01-09Merge git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc-mergeLinus Torvalds2-0/+5
2006-01-09[PATCH] rcu: uninline __rcu_pending()Oleg Nesterov1-0/+30
__rcu_pending() is rather fat and called twice from rcu_pending(). rcu_pending() has multiple callers, and not that small too. This patch uninlines both of them. Signed-off-by: Oleg Nesterov <[email protected]> Acked-by: Paul E. McKenney <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2006-01-08[PATCH] Make vm86 support optionalMatt Mackall1-0/+2
This adds an option to remove vm86 support under CONFIG_EMBEDDED. Saves about 5k. This version eliminates most of the #ifdefs of the previous version and instead uses function stubs in vm86.h. Also, release_vm86_irqs is moved from asm-i386/irq.h to a more appropriate home in vm86.h so that the stubs can live together. $ size vmlinux-baseline vmlinux-novm86 text data bss dec hex filename 2920821 523232 190652 3634705 377611 vmlinux-baseline 2916268 523100 190492 3629860 376324 vmlinux-novm86 Signed-off-by: Matt Mackall <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2006-01-08[PATCH] tiny: Make *[ug]id16 support optionalMatt Mackall1-0/+19
Configurable 16-bit UID and friends support This allows turning off the legacy 16 bit UID interfaces on embedded platforms. text data bss dec hex filename 3330172 529036 190556 4049764 3dcb64 vmlinux-baseline 3328268 529040 190556 4047864 3dc3f8 vmlinux From: Adrian Bunk <[email protected]> UID16 was accidentially disabled for !EMBEDDED. Signed-off-by: Matt Mackall <[email protected]> Signed-off-by: Adrian Bunk <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2006-01-08[PATCH] simplify k_getrusage()Oleg Nesterov1-18/+11
Factor out common code for different RUSAGE_xxx cases. Don't take ->sighand->siglock in RUSAGE_SELF case, suggested by Ravikiran G Thirumalai <[email protected]>. Signed-off-by: Oleg Nesterov <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
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