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Nicolai Hähnle ea9e0fb8fe locking/ww_mutex: Set use_ww_ctx even when locking without a context 
We will add a new field to struct mutex_waiter.  This field must be
initialized for all waiters if any waiter uses the ww_use_ctx path.

So there is a trade-off: Keep ww_mutex locking without a context on
the faster non-use_ww_ctx path, at the cost of adding the
initialization to all mutex locks (including non-ww_mutexes), or avoid
the additional cost for non-ww_mutex locks, at the cost of adding
additional checks to the use_ww_ctx path.

We take the latter choice.  It may be worth eliminating the users of
ww_mutex_lock(lock, NULL), but there are a lot of them.

Signed-off-by: Nicolai Hähnle <Nicolai.Haehnle@amd.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Daniel Vetter <daniel@ffwll.ch>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Maarten Lankhorst <dev@mblankhorst.nl>
Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: dri-devel@lists.freedesktop.org
Link: http://lkml.kernel.org/r/1482346000-9927-5-git-send-email-nhaehnle@gmail.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-14 11:14:40 +01:00
..
bpf
bpf: do not use KMALLOC_SHIFT_MAX
2017-01-10 18:31:54 -08:00
configs
config: android: enable CONFIG_SECCOMP
2016-10-11 15:06:32 -07:00
debug
kdb: call vkdb_printf() from vprintk_default() only when wanted
2016-12-14 16:04:08 -08:00
events
Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2016-12-23 16:49:12 -08:00
gcov
gcov: add support for gcc version >= 6
2016-07-15 14:54:27 +09:00
irq
genirq/affinity: Fix node generation from cpumask
2016-12-15 12:32:35 +01:00
livepatch
livepatch/module: make TAINT_LIVEPATCH module-specific
2016-08-26 14:42:08 +02:00
locking
locking/ww_mutex: Set use_ww_ctx even when locking without a context
2017-01-14 11:14:40 +01:00
power
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
printk
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
rcu
rcu: Don't kick unless grace period or request
2016-11-14 10:46:31 -08:00
sched
ktime: Cleanup ktime_set() usage
2016-12-25 17:21:22 +01:00
time
ktime: Cleanup ktime_set() usage
2016-12-25 17:21:22 +01:00
trace
clocksource: Use a plain u64 instead of cycle_t
2016-12-25 11:04:12 +01:00
.gitignore
…
acct.c
…
async.c
…
audit_fsnotify.c
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2016-12-17 18:44:00 -08:00
audit_tree.c
Merge branch 'stable-4.10' of git://git.infradead.org/users/pcmoore/audit
2017-01-05 23:06:06 -08:00
audit_watch.c
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2016-12-17 18:44:00 -08:00
audit.c
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2016-12-17 18:44:00 -08:00
audit.h
audit_log_{name,link_denied}: constify struct path
2016-12-05 19:00:38 -05:00
auditfilter.c
audit: add support for session ID user filter
2016-11-29 15:10:12 -05:00
auditsc.c
Merge branch 'stable-4.10' of git://git.infradead.org/users/pcmoore/audit
2016-12-14 14:06:40 -08:00
backtracetest.c
…
bounds.c
…
capability.c
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
cgroup_freezer.c
…
cgroup_pids.c
cgroup: Use lld instead of ld when printing pids controller events_limit
2016-06-21 15:03:36 -04:00
cgroup.c
cgroup: add support for eBPF programs
2016-11-25 16:25:52 -05:00
compat.c
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
configs.c
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
context_tracking.c
…
cpu_pm.c
…
cpu.c
smp/hotplug: Undo tglxs brainfart
2016-12-26 17:30:24 -08:00
cpuset.c
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
crash_dump.c
…
cred.c
cred: Reject inodes with invalid ids in set_create_file_as()
2016-06-30 18:05:09 -05:00
delayacct.c
…
dma.c
…
elfcore.c
…
exec_domain.c
…
exit.c
sched/wait, RCU: Introduce rcuwait machinery
2017-01-14 11:14:33 +01:00
extable.c
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
fork.c
locking/mutex: Fix mutex handoff
2017-01-14 11:14:38 +01:00
freezer.c
freezer, oom: check TIF_MEMDIE on the correct task
2016-07-28 16:07:41 -07:00
futex_compat.c
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
futex.c
ktime: Get rid of the union
2016-12-25 17:21:22 +01:00
groups.c
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
hung_task.c
hung_task: decrement sysctl_hung_task_warnings only if it is positive
2016-12-12 18:55:09 -08:00
irq_work.c
…
jump_label.c
Merge tag 'powerpc-4.8-2' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux
2016-08-05 09:00:54 -04:00
kallsyms.c
…
kcmp.c
…
Kconfig.freezer
…
Kconfig.hz
…
Kconfig.locks
locking/mutex: Allow MUTEX_SPIN_ON_OWNER when DEBUG_MUTEXES
2016-10-25 11:31:51 +02:00
Kconfig.preempt
…
kcov.c
kcov: make kcov work properly with KASLR enabled
2016-12-20 09:48:47 -08:00
kexec_core.c
kexec: add cond_resched into kimage_alloc_crash_control_pages
2016-12-14 16:04:07 -08:00
kexec_file.c
ima: on soft reboot, save the measurement list
2016-12-20 09:48:44 -08:00
kexec_internal.h
kexec_file: Allow arch-specific memory walking for kexec_add_buffer
2016-11-30 23:14:57 +11:00
kexec.c
kexec: allow architectures to override boot mapping
2016-08-02 19:35:27 -04:00
kmod.c
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
kprobes.c
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
ksysfs.c
kexec: add a kexec_crash_loaded() function
2016-08-02 19:35:30 -04:00
kthread.c
kthread: add __printf attributes
2016-12-12 18:55:06 -08:00
latencytop.c
…
Makefile
Merge branch 'akpm' (patches from Andrew)
2016-12-14 17:25:18 -08:00
membarrier.c
…
memremap.c
mm: fix devm_memremap_pages crash, use mem_hotplug_{begin, done}
2017-01-10 18:31:54 -08:00
module_signing.c
…
module-internal.h
…
module.c
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
notifier.c
…
nsproxy.c
…
padata.c
padata: Remove unused but set variables
2016-10-25 11:08:10 +08:00
panic.c
taint/module: Clean up global and module taint flags handling
2016-11-26 11:18:01 -08:00
params.c
…
pid_namespace.c
Merge branch 'nsfs-ioctls' into HEAD
2016-09-22 20:00:36 -05:00
pid.c
remove lots of IS_ERR_VALUE abuses
2016-05-27 15:26:11 -07:00
profile.c
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
ptrace.c
ptrace: Don't allow accessing an undumpable mm
2016-11-22 12:57:38 -06:00
range.c
…
reboot.c
…
relay.c
relay: check array offset before using it
2016-12-14 16:04:08 -08:00
resource.c
/proc/iomem: only expose physical resource addresses to privileged users
2016-04-14 12:56:09 -07:00
seccomp.c
Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security
2016-12-14 13:57:44 -08:00
signal.c
signal: protect SIGNAL_UNKILLABLE from unintentional clearing.
2017-01-10 18:31:55 -08:00
smp.c
kernel/smp: Tell the user we're bringing up secondary CPUs
2016-10-26 12:02:35 +02:00
smpboot.c
kthread/smpboot: do not park in kthread_create_on_cpu()
2016-10-11 15:06:33 -07:00
smpboot.h
…
softirq.c
softirq: Display IRQ_POLL for irq-poll statistics
2016-10-21 15:45:47 -06:00
stacktrace.c
…
stop_machine.c
locking/core, stop_machine: Yield the CPU during stop machine()
2016-11-16 10:15:09 +01:00
sys_ni.c
move aio compat to fs/aio.c
2016-12-22 22:58:37 -05:00
sys.c
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
sysctl_binary.c
sysctl: add KERN_CONT to deprecated_sysctl_warning()
2016-12-14 16:04:07 -08:00
sysctl.c
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
task_work.c
task_work: use READ_ONCE/lockless_dereference, avoid pi_lock if !task_works
2016-08-02 19:35:02 -04:00
taskstats.c
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
2016-11-15 10:54:36 -05:00
test_kprobes.c
…
torture.c
torture: Convert torture_shutdown() to hrtimer
2016-08-22 10:01:49 -07:00
tracepoint.c
tracing: Have the reg function allow to fail
2016-12-09 09:13:30 -05:00
tsacct.c
…
ucount.c
mntns: Add a limit on the number of mount namespaces.
2016-08-31 07:28:35 -05:00
uid16.c
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
up.c
smp: Add function to execute a function synchronously on a CPU
2016-09-05 13:52:39 +02:00
user_namespace.c
Merge branch 'nsfs-ioctls' into HEAD
2016-09-22 20:00:36 -05:00
user-return-notifier.c
…
user.c
…
utsname_sysctl.c
…
utsname.c
Merge branch 'nsfs-ioctls' into HEAD
2016-09-22 20:00:36 -05:00
watchdog_hld.c
kernel/watchdog.c: move hardlockup detector to separate file
2016-12-14 16:04:08 -08:00
watchdog.c
kernel/watchdog.c: move hardlockup detector to separate file
2016-12-14 16:04:08 -08:00
workqueue_internal.h
…
workqueue.c
Merge branch 'for-4.9' into for-4.10
2016-10-19 12:12:40 -04:00