Akinobu Mita e6bde73b07 cpu-hotplug: return better errno on cpu hotplug failure ...

Currently, onlining or offlining a CPU failure by one of the cpu notifiers
error always cause -EINVAL error.  (i.e.  writing 0 or 1 to
/sys/devices/system/cpu/cpuX/online gets EINVAL)

To get better error reporting rather than always getting -EINVAL, This
changes cpu_notify() to return -errno value with notifier_to_errno() and
fix the callers.  Now that cpu notifiers can return encapsulate errno
value.

Currently, all cpu hotplug notifiers return NOTIFY_OK, NOTIFY_BAD, or
NOTIFY_DONE.  So cpu_notify() can returns 0 or -EPERM with this change for
now.

(notifier_to_errno(NOTIFY_OK) == 0, notifier_to_errno(NOTIFY_DONE) == 0,
notifier_to_errno(NOTIFY_BAD) == -EPERM)

Forthcoming patches convert several cpu notifiers to return encapsulate
errno value with notifier_from_errno().

Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

2010-05-27 09:12:47 -07:00

..

debug

x86, kgdb, init: Add early and late debug states

2010-05-20 21:04:29 -05:00

gcov

microblaze: Enable GCOV_PROFILE_ALL

2009-09-21 14:29:21 +02:00

irq

genirq: Clear CPU mask in affinity_hint when none is provided

2010-05-12 11:23:34 +02:00

power

PM / Hibernate: Fix block_io.c printk warning

2010-05-10 23:08:18 +02:00

time

Merge branch 'timers-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

2010-05-19 17:11:10 -07:00

trace

Merge branch 'master' into for-2.6.35

2010-05-21 21:27:26 +02:00

.gitignore

…

acct.c

Merge branch 'next' into for-linus

2010-05-18 08:57:00 +10:00

async.c

include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h

2010-03-30 22:02:32 +09:00

audit_tree.c

include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h

2010-03-30 22:02:32 +09:00

audit_watch.c

include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h

2010-03-30 22:02:32 +09:00

audit.c

include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h

2010-03-30 22:02:32 +09:00

audit.h

…

auditfilter.c

include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h

2010-03-30 22:02:32 +09:00

auditsc.c

audit: preface audit printk with audit

2010-04-05 13:19:45 -07:00

backtracetest.c

…

bounds.c

kbuild: move bounds.h to include/generated

2009-12-12 13:08:14 +01:00

capability.c

sched: Remove remaining USER_SCHED code

2010-04-02 20:12:00 +02:00

cgroup_freezer.c

Freezer / cgroup freezer: Update stale locking comments

2010-05-10 23:18:47 +02:00

cgroup.c

cgroups: make cftype.unregister_event() void-returning

2010-05-27 09:12:44 -07:00

compat.c

cpumask: fix compat getaffinity

2010-05-19 11:48:18 -07:00

configs.c

…

cpu.c

cpu-hotplug: return better errno on cpu hotplug failure

2010-05-27 09:12:47 -07:00

cpuset.c

cpusets: new round-robin rotor for SLAB allocations

2010-05-27 09:12:44 -07:00

cred.c

umh: creds: kill subprocess_info->cred logic

2010-05-27 09:12:45 -07:00

delayacct.c

headers: taskstats_kern.h trim

2009-09-18 09:48:52 -07:00

dma.c

…

early_res.c

x86: Do not free zero sized per cpu areas

2010-03-29 18:55:40 +02:00

elfcore.c

elf coredump: add extended numbering support

2010-03-06 11:26:46 -08:00

exec_domain.c

…

exit.c

proc: turn signal_struct->count into "int nr_threads"

2010-05-27 09:12:47 -07:00

extable.c

…

fork.c

proc: turn signal_struct->count into "int nr_threads"

2010-05-27 09:12:47 -07:00

freezer.c

…

futex_compat.c

futex: Protect pid lookup in compat code with RCU

2009-12-09 14:22:14 +01:00

futex.c

futex: Handle futex value corruption gracefully

2010-02-03 15:13:22 +01:00

groups.c

security: remove dead hook task_setgroups

2010-04-12 12:19:18 +10:00

hrtimer.c

hrtimers: Provide schedule_hrtimeout for CLOCK_REALTIME

2010-04-06 21:50:03 +02:00

hung_task.c

softlockup: Fix hung_task_check_count sysctl

2009-11-27 06:21:57 +01:00

hw_breakpoint.c

hw_breakpoints: Fix percpu build failure

2010-05-04 08:39:36 +02:00

itimer.c

itimers: Fix racy writes to cpu_itimer fields

2009-11-18 16:32:12 +01:00

kallsyms.c

kdb: core for kgdb back end (2 of 2)

2010-05-20 21:04:21 -05:00

Kconfig.freezer

…

Kconfig.hz

…

Kconfig.locks

mutex: Better control mutex adaptive spinning config

2009-12-03 11:50:11 +01:00

Kconfig.preempt

…

kexec.c

kexec: fix OOPS in crash_kernel_shrink

2010-05-11 17:33:42 -07:00

kfifo.c

kfifo: Don't use integer as NULL pointer

2010-02-16 15:11:08 -08:00

kmod.c

call_usermodehelper: UMH_WAIT_EXEC ignores kernel_thread() failure

2010-05-27 09:12:45 -07:00

kprobes.c

kprobes: Move enable/disable_kprobe() out from debugfs code

2010-05-08 18:08:30 +02:00

ksysfs.c

sysfs: add struct file* to bin_attr callbacks

2010-05-21 09:37:31 -07:00

kthread.c

cpuset: fix the problem that cpuset_mem_spread_node() returns an offline node

2010-03-24 16:31:21 -07:00

latencytop.c

include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h

2010-03-30 22:02:32 +09:00

lockdep_internals.h

lockdep: No need to disable preemption in debug atomic ops

2010-05-04 05:38:16 +02:00

lockdep_proc.c

lockstat: Make lockstat counting per cpu

2010-04-06 00:15:37 +02:00

lockdep_states.h

…

lockdep.c

lockdep: Add novalidate class for dev->mutex conversion

2010-05-21 09:37:30 -07:00

Makefile

Move kernel/kgdb.c to kernel/debug/debug_core.c

2010-05-20 21:04:18 -05:00

module.c

Revert "module: drop the lock while waiting for module to complete initialization."

2010-05-25 16:48:30 -07:00

mutex-debug.c

headers: remove sched.h from interrupt.h

2009-10-11 11:20:58 -07:00

mutex-debug.h

locking: Implement new raw_spinlock

2009-12-14 23:55:32 +01:00

mutex.c

mutex: Better control mutex adaptive spinning config

2009-12-03 11:50:11 +01:00

mutex.h

…

notifier.c

sched: Use lockdep-based checking on rcu_dereference()

2010-02-25 10:34:26 +01:00

ns_cgroup.c

cgroups: let ss->can_attach and ss->attach do whole threadgroups at a time

2009-09-24 07:20:58 -07:00

nsproxy.c

include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h

2010-03-30 22:02:32 +09:00

padata.c

padata: Use get_online_cpus/put_online_cpus in padata_free

2010-05-19 13:45:35 +10:00

panic.c

panic: Add taint flag TAINT_FIRMWARE_WORKAROUND ('I')

2010-05-19 08:37:43 +01:00

params.c

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial

2010-03-12 16:04:50 -08:00

perf_event.c

perf: Fix exit() vs event-groups

2010-05-11 17:08:24 +02:00

pid_namespace.c

include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h

2010-03-30 22:02:32 +09:00

pid.c

Merge branch 'core-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

2010-03-13 14:43:01 -08:00

pm_qos_params.c

PM: PM QOS update fix

2010-05-17 00:21:03 +02:00

posix-cpu-timers.c

posix-cpu-timers: avoid "task->signal != NULL" checks

2010-05-27 09:12:46 -07:00

posix-timers.c

posix-timers.c: Don't export local functions

2010-02-05 14:54:10 +01:00

printk.c

printk,kdb: capture printk() when in kdb shell

2010-05-20 21:04:27 -05:00

profile.c

profile: fix stats and data leakage

2010-05-14 19:45:06 -07:00

ptrace.c

ptrace: PTRACE_GETFDPIC: fix the unsafe usage of child->mm

2010-05-27 09:12:44 -07:00

range.c

x86: Change range end to start+size

2010-02-10 17:47:17 -08:00

rcupdate.c

rcu: slim down rcutiny by removing rcu_scheduler_active and friends

2010-05-10 11:08:34 -07:00

rcutiny_plugin.h

rcu: slim down rcutiny by removing rcu_scheduler_active and friends

2010-05-10 11:08:34 -07:00

rcutiny.c

rcu: remove all rcu head initializations, except on_stack initializations

2010-05-11 16:10:47 -07:00

rcutorture.c

Merge branch 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

2010-05-18 08:27:54 -07:00

rcutree_plugin.h

rcu: remove all rcu head initializations, except on_stack initializations

2010-05-11 16:10:47 -07:00

rcutree_trace.c

rcu: reduce the number of spurious RCU_SOFTIRQ invocations

2010-05-10 11:08:35 -07:00

rcutree.c

rcu: remove all rcu head initializations, except on_stack initializations

2010-05-11 16:10:47 -07:00

rcutree.h

rcu: reduce the number of spurious RCU_SOFTIRQ invocations

2010-05-10 11:08:35 -07:00

relay.c

pipe: add support for shrinking and growing pipes

2010-05-21 21:12:40 +02:00

res_counter.c

include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h

2010-03-30 22:02:32 +09:00

resource.c

resource: shared I/O region support

2010-05-11 12:01:10 -07:00

rtmutex_common.h

…

rtmutex-debug.c

sched: Convert pi_lock to raw_spinlock

2009-12-14 23:55:33 +01:00

rtmutex-debug.h

…

rtmutex-tester.c

…

rtmutex.c

rtmutes: Convert rtmutex.lock to raw_spinlock

2009-12-14 23:55:33 +01:00

rtmutex.h

…

rwsem.c

…

sched_clock.c

blkio: fix for modular blk-cgroup build

2010-04-15 08:54:59 +02:00

sched_cpupri.c

include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h

2010-03-30 22:02:32 +09:00

sched_cpupri.h

sched: Convert cpupri lock to raw_spinlock

2009-12-14 23:55:33 +01:00

sched_debug.c

proc_sched_show_task(): use get_nr_threads()

2010-05-27 09:12:47 -07:00

sched_fair.c

sched: replace migration_thread with cpu_stop

2010-05-06 18:49:21 +02:00

sched_features.h

sched: Remove ASYM_GRAN feature

2010-03-11 18:32:53 +01:00

sched_idletask.c

sched: Cure load average vs NO_HZ woes

2010-04-23 11:02:02 +02:00

sched_rt.c

sched: Add enqueue/dequeue flags

2010-04-02 20:12:05 +02:00

sched_stats.h

…

sched.c

signals: kill the awful task_rq_unlock_wait() hack

2010-05-27 09:12:46 -07:00

seccomp.c

…

semaphore.c

…

signal.c

exit: change zap_other_threads() to count sub-threads

2010-05-27 09:12:46 -07:00

slow-work-debugfs.c

SLOW_WORK: Move slow_work's proc file to debugfs

2009-12-01 08:20:31 -08:00

slow-work.c

slow-work: use get_ref wrapper instead of directly calling get_ref

2010-03-29 09:13:30 -07:00

slow-work.h

SLOW_WORK: CONFIG_SLOW_WORK_PROC should be CONFIG_SLOW_WORK_DEBUG

2010-03-29 09:14:47 -07:00

smp.c

include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h

2010-03-30 22:02:32 +09:00

softirq.c

rcu: refactor RCU's context-switch handling

2010-05-10 11:08:33 -07:00

softlockup.c

softlockup: Stop spurious softlockup messages due to overflow

2010-03-21 19:30:13 +01:00

spinlock.c

locking: Cleanup the name space completely

2009-12-14 23:55:33 +01:00

srcu.c

include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h

2010-03-30 22:02:32 +09:00

stacktrace.c

…

stop_machine.c

stop_machine: Move local variable closer to the usage site in cpu_stop_cpu_callback()

2010-05-18 00:17:44 +02:00

sys_ni.c

Add generic sys_ipc wrapper

2010-03-12 15:52:32 -08:00

sys.c

kmod: add init function to usermodehelper

2010-05-27 09:12:44 -07:00

sysctl_binary.c

sysctl: don't use own implementation of hex_to_bin()

2010-05-25 08:07:05 -07:00

sysctl_check.c

ipv4 05/05: add sysctl to accept packets with local source addresses

2009-12-03 12:14:38 -08:00

sysctl.c

Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6

2010-05-25 16:59:51 -07:00

taskstats.c

include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h

2010-03-30 22:02:32 +09:00

test_kprobes.c

…

time.c

timekeeping: Fix timezone update

2010-05-24 11:50:38 +02:00

timeconst.pl

…

timer.c

timers: Fix slack calculation for expired timers

2010-05-24 12:10:23 +02:00

tracepoint.c

trivial: fix typo "to to" in multiple files

2009-09-21 15:14:55 +02:00

tsacct.c

mm: clean up mm_counter

2010-03-06 11:26:23 -08:00

uid16.c

headers: utsname.h redux

2009-09-23 18:13:10 -07:00

up.c

…

user_namespace.c

kref: remove kref_set

2010-05-21 09:37:29 -07:00

user-return-notifier.c

core: Clean up user return notifers use of per_cpu

2009-12-02 10:22:59 +01:00

user.c

sched: Remove a stale comment

2010-05-10 08:48:39 +02:00

utsname_sysctl.c

sysctl kernel: Remove binary sysctl logic

2009-11-12 02:04:55 -08:00

utsname.c

…

wait.c

…

workqueue.c

workqueue: change cancel_work_sync() to clear work->data

2010-04-30 08:57:25 +02:00