Tejun Heo
105347ba5d
cgroup: make cgroup_file_open() rcu_read_lock() around cgroup_css() and add cfent->css ...
For the planned unified hierarchy, each css (cgroup_subsys_state) will
be RCU protected so that it can be created and destroyed individually
while allowing RCU accesses, and cgroup_css() will soon require either
holding cgroup_mutex or RCU read lock.
This patch updates cgroup_file_open() such that it acquires the
associated css under rcu_read_lock(). While cgroup_file_css() usages
in other file operations are safe due to the reference from open,
cgroup_css() wouldn't know that and will still trigger warnings. It'd
be cleanest to store the acquired css in file->prvidate_data for
further file operations but that's already used by seqfile. This
patch instead adds cfent->css to cache the associated css. Note that
while this field is initialized during cfe init, it should only be
considered valid while the file is open.
This patch doesn't change visible behavior.
Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: Li Zefan <lizefan@huawei.com>
2013-08-13 11:01:55 -04:00
idle: Enable interrupts in the weak arch_cpu_idle() implementation
2013-06-14 23:01:05 +02:00
kgdb/sysrq: fix inconstistent help message of sysrq key
2013-04-30 17:04:10 -07:00
cgroup: cgroup_css_from_dir() now should be called with RCU read locked
2013-08-13 11:01:54 -04:00
kernel/gcov: remove depends on CONFIG_EXPERIMENTAL
2013-01-11 11:39:33 -08:00
irqdomain refactoring for v3.11
2013-07-06 12:37:04 -07:00
Merge branch 'akpm' (updates from Andrew Morton)
2013-07-03 17:12:13 -07:00
cgroup: make cgroup_taskset deal with cgroup_subsys_state instead of cgroup
2013-08-08 20:11:27 -04:00
clocksource: Reselect clocksource when watchdog validated high-res capability
2013-07-05 11:09:28 +02:00
The majority of the changes here are cleanups for the large changes that
2013-07-11 09:02:09 -07:00
kernel/hz.bc: ignore.
2013-04-22 07:09:06 -07:00
fs: Fix hang with BSD accounting on frozen filesystem
2013-05-04 14:57:58 -04:00
async: rename and redefine async_func_ptr
2013-03-12 13:59:14 -07:00
audit: wait_for_auditd() should use TASK_UNINTERRUPTIBLE
2013-06-12 16:29:45 -07:00
audit: fix mq_open and mq_unlink to add the MQ root as a hidden parent audit_names record
2013-07-09 10:33:19 -07:00
kernel/audit_tree.c:audit_add_tree_rule(): protect `rule' from kill_rules()
2013-06-12 16:29:46 -07:00
audit: catch possible NULL audit buffers
2013-01-11 14:54:55 -08:00
audit: Fix decimal constant description
2013-07-09 10:33:19 -07:00
audit: fix mq_open and mq_unlink to add the MQ root as a hidden parent audit_names record
2013-07-09 10:33:19 -07:00
Add file_ns_capable() helper function for open-time capability checking
2013-04-14 10:06:31 -07:00
cgroup: make cgroup_file_open() rcu_read_lock() around cgroup_css() and add cfent->css
2013-08-13 11:01:55 -04:00
cgroup: make css_for_each_descendant() and friends include the origin css in the iteration
2013-08-08 20:11:27 -04:00
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/signal
2013-05-01 07:21:43 -07:00
proc: Supply PDE attribute setting accessor functions
2013-05-01 17:29:18 -04:00
Merge branch 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2013-06-20 08:18:35 -10:00
CPU hotplug: provide a generic helper to disable/enable CPU hotplug
2013-06-12 16:29:44 -07:00
cgroup: make css_for_each_descendant() and friends include the origin css in the iteration
2013-08-08 20:11:27 -04:00
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace
2012-12-18 10:55:28 -08:00
cputime: Use accessors to read task cputime stats
2013-01-27 19:23:31 +01:00
ptrace: revert "Prepare to fix racy accesses on task breakpoints"
2013-07-09 10:33:26 -07:00
extable: Flip the sorting message
2013-04-15 13:25:16 +02:00
mm: remove free_area_cache
2013-07-10 18:11:34 -07:00
freezer: skip waking up tasks with PF_FREEZER_SKIP set
2013-05-12 14:16:22 +02:00
futex: Use freezable blocking call
2013-06-25 23:11:19 +02:00
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/signal
2013-02-23 18:50:11 -08:00
Merge branch 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2013-07-06 14:09:38 -07:00
Merge branch 'nohz/printk-v8' into irq/core
2013-02-05 00:48:46 +01:00
kernel: kallsyms: memory override issue, need check destination buffer length
2013-04-15 15:17:26 +09:30
kcmp: include linux/ptrace.h
2012-12-20 17:40:19 -08:00
locking: Fix copy/paste errors of "ARCH_INLINE_*_UNLOCK_BH"
2013-05-28 08:50:00 +02:00
kexec: Use min() and min_t() to simplify logic
2013-04-30 17:04:07 -07:00
usermodehelper: kill the sub_info->path[0] check
2013-07-03 16:08:02 -07:00
kprobes: handle empty/invalid input to debugfs "enabled" file
2013-07-03 16:07:46 -07:00
Merge branch 'core-rcu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2012-12-11 18:10:49 -08:00
kthread: implement probe_kthread_data()
2013-04-30 17:04:02 -07:00
lockdep: remove task argument from debug_check_no_locks_held
2013-05-12 14:16:21 +02:00
lockdep: Use KSYM_NAME_LEN'ed buffer for __get_key_name()
2012-10-24 12:39:09 +02:00
reboot: move shutdown/reboot related functions to kernel/reboot.c
2013-07-09 10:33:29 -07:00
CONFIG_SYMBOL_PREFIX: cleanup.
2013-03-15 15:09:43 +10:30
keys: use keyring_alloc() to create module signing keyring
2012-12-20 17:40:21 -08:00
MODSIGN: Move the magic string to the end of a module and eliminate the search
2012-10-19 17:30:40 -07:00
Nothing interesting. Except the most embarrassing bugfix ever. But let's
2013-07-10 14:51:41 -07:00
MODSIGN: Don't use enum-type bitfields in module signature info block
2012-12-05 11:27:24 +10:30
mutex: Add w/w mutex slowpath debugging
2013-06-26 12:10:56 +02:00
proc: Split the namespace stuff out into linux/proc_ns.h
2013-05-01 17:29:39 -04:00
padata: use __this_cpu_read per-cpu helper
2012-12-06 17:16:23 +08:00
The majority of the changes here are cleanups for the large changes that
2013-07-11 09:02:09 -07:00
There is no /sys/parameters
2013-07-02 15:38:19 +09:30
kernel/pid.c: move statement
2013-07-03 16:08:05 -07:00
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2013-05-01 17:51:54 -07:00
posix_timers: fix racy timer delta caching on task exit
2013-07-03 16:54:42 +02:00
posix-timers: Remove unused variable
2013-04-18 12:51:19 +02:00
Merge branch 'core-printk-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2013-07-10 18:14:24 -07:00
proc: Supply PDE attribute setting accessor functions
2013-05-01 17:29:18 -04:00
ptrace: PTRACE_DETACH should do flush_ptrace_hw_breakpoint(child)
2013-07-09 10:33:26 -07:00
range: Do not add new blank slot with add_range_with_merge
2013-06-18 11:32:10 -05:00
rcu: Provide RCU CPU stall warnings for tiny RCU
2013-01-28 22:06:21 -08:00
Merge branches 'cbnum.2013.06.10a', 'doc.2013.06.10a', 'fixes.2013.06.10a', 'srcu.2013.06.10a' and 'tiny.2013.06.10a' into HEAD
2013-06-10 13:46:44 -07:00
rcu: Shrink TINY_RCU by reworking CPU-stall ifdefs
2013-06-10 13:45:53 -07:00
rcu: Shrink TINY_RCU by reworking CPU-stall ifdefs
2013-06-10 13:45:53 -07:00
rcu: Remove srcu_read_lock_raw() and srcu_read_unlock_raw().
2013-06-10 13:45:25 -07:00
drivers: avoid parsing names as kthread_run() format strings
2013-07-03 16:07:41 -07:00
rcu: Drive quiescent-state-forcing delay from HZ
2013-06-10 13:44:56 -07:00
Merge branches 'cbnum.2013.06.10a', 'doc.2013.06.10a', 'fixes.2013.06.10a', 'srcu.2013.06.10a' and 'tiny.2013.06.10a' into HEAD
2013-06-10 13:46:44 -07:00
rcutrace: single_open() leaks
2013-05-05 00:16:35 -04:00
reboot: move arch/x86 reboot= handling to generic kernel
2013-07-09 10:33:29 -07:00
Merge branch 'for-3.10/core' of git://git.kernel.dk/linux-block
2013-05-08 10:13:35 -07:00
res_counter: return amount of charges after res_counter_uncharge()
2012-12-18 15:02:12 -08:00
kernel/resource.c: remove the unneeded assignment in function __find_resource
2013-07-03 16:08:06 -07:00
sched/rt: Move rt specific bits into new header file
2013-02-07 20:51:08 +01:00
locking/rtmutex/tester: Set correct permissions on sysfs files
2013-04-10 14:48:37 +02:00
rtmutex: Document rt_mutex_adjust_prio_chain()
2013-05-28 09:23:52 +02:00
Revert "rw_semaphore: remove up/down_read_non_owner"
2013-03-23 15:53:52 -07:00
seccomp: allow BPF_XOR based ALU instructions.
2013-03-26 11:07:19 +11:00
semaphore: use `bool' type for semaphore_waiter's up
2013-04-30 17:04:08 -07:00
sigtimedwait: use freezable blocking call
2013-05-12 14:16:23 +02:00
kernel/smp.c: cleanups
2013-04-30 17:04:03 -07:00
kthread: Prevent unpark race which puts threads on the wrong cpu
2013-04-12 14:18:43 +02:00
Merge branch 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2013-07-02 16:14:35 -07:00
srcu: use ACCESS_ONCE() to access sp->completed in srcu_read_lock()
2013-02-07 15:19:36 -08:00
stop_machine: Mark per cpu stopper enabled early
2013-02-26 22:25:17 +01:00
reboot: move shutdown/reboot related functions to kernel/reboot.c
2013-07-09 10:33:29 -07:00
unify compat fanotify_mark(2), switch to COMPAT_SYSCALL_DEFINE
2013-05-09 13:46:38 -04:00
The majority of the changes here are cleanups for the large changes that
2013-07-11 09:02:09 -07:00
kernel: remove unnecessary head file
2013-06-26 18:01:46 +09:00
taskstats: cgroupstats_user_cmd() may leak on error
2012-10-06 03:05:31 +09:00
kernel/: rename random32() to prandom_u32()
2013-04-29 18:28:42 -07:00
sched: Rename sched.c as sched/core.c in comments and Documentation
2013-06-19 12:58:42 +02:00
kernel: Replace timeconst.pl with a bc script
2013-02-16 23:17:25 +01:00
timer: Fix jiffies wrap behavior of round_jiffies_common()
2013-06-28 17:10:11 +02:00
Tracing updates for Linux 3.10
2013-04-29 13:55:38 -07:00
cputime: Use accessors to read task cputime stats
2013-01-27 19:23:31 +01:00
make SYSCALL_DEFINE<n>-generated wrappers do asmlinkage_protect
2013-03-03 22:58:33 -05:00
hlist: drop the node parameter from iterators
2013-02-27 19:10:24 -08:00
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2013-05-01 17:51:54 -07:00
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2013-05-01 17:51:54 -07:00
proc: Split the namespace stuff out into linux/proc_ns.h
2013-05-01 17:29:39 -04:00
kernel/utsname_sysctl.c: put get/get_uts() into CONFIG_PROC_SYSCTL code block
2013-02-27 19:10:22 -08:00
Add wait_on_atomic_t() and wake_up_atomic_t()
2013-05-15 13:50:38 +01:00
watchdog: Add comments to explain the watchdog_disabled variable
2013-03-14 08:24:05 +01:00
Merge branch 'for-3.11' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq
2013-07-02 19:53:30 -07:00
sched: Rename sched.c as sched/core.c in comments and Documentation
2013-06-19 12:58:42 +02:00
105347ba5d