The patch titled
lock validator: provide lockdep_off()/lockdep_on() APIs.
has been removed from the -mm tree. Its filename is
lock-validator-core-provide-lockdep_off-lockdep_on-apis.patch
This patch was dropped because lockdep is being redone
------------------------------------------------------
Subject: lock validator: provide lockdep_off()/lockdep_on() APIs.
From: Ingo Molnar <mingo@xxxxxxx>
These APIs are used by NTFS to ignore one-time, single-threaded,
exceptional bootstrap locking patterns that wont reoccur during the
lifetime of the filesystem. The 'off' state is nestable and it only
affects the current task.
Signed-off-by: Ingo Molnar <mingo@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxx>
---
include/linux/lockdep.h | 14 +++++++-
kernel/lockdep.c | 62 +++++++++++++++++++++++++++++---------
2 files changed, 61 insertions(+), 15 deletions(-)
diff -puN include/linux/lockdep.h~lock-validator-core-provide-lockdep_off-lockdep_on-apis include/linux/lockdep.h
--- a/include/linux/lockdep.h~lock-validator-core-provide-lockdep_off-lockdep_on-apis
+++ a/include/linux/lockdep.h
@@ -193,6 +193,9 @@ extern void lockdep_free_key_range(void
extern void print_lock_types(void);
extern void lockdep_print_held_locks(struct task_struct *task);
+extern void lockdep_off(void);
+extern void lockdep_on(void);
+
/*
* These methods are used by specific locking variants (spinlocks,
* rwlocks, mutexes and rwsems) to pass init/acquire/release events
@@ -210,7 +213,16 @@ extern void lockdep_release(struct lockd
# define INIT_LOCKDEP .lockdep_recursion = 0,
-#else /* LOCKDEP */
+#else /* !LOCKDEP */
+
+static inline void lockdep_off(void)
+{
+}
+
+static inline void lockdep_on(void)
+{
+}
+
# define lockdep_init() do { } while (0)
# define lockdep_info() do { } while (0)
# define print_lock_types() do { } while (0)
diff -puN kernel/lockdep.c~lock-validator-core-provide-lockdep_off-lockdep_on-apis kernel/lockdep.c
--- a/kernel/lockdep.c~lock-validator-core-provide-lockdep_off-lockdep_on-apis
+++ a/kernel/lockdep.c
@@ -125,12 +125,28 @@ static struct list_head chainhash_table[
((key1) >> (64-MAX_LOCKDEP_KEYS_BITS/2)) ^ \
(key2))
+void lockdep_off(void)
+{
+ current->lockdep_recursion++;
+}
+
+EXPORT_SYMBOL(lockdep_off);
+
+void lockdep_on(void)
+{
+ current->lockdep_recursion--;
+}
+
+EXPORT_SYMBOL(lockdep_on);
+
/*
* Debugging switches:
*/
-#define LOCKDEP_OFF 0
#define VERBOSE 0
+#ifdef VERBOSE
+# define VERY_VERBOSE 0
+#endif
#if VERBOSE
# define HARDIRQ_VERBOSE 1
@@ -146,11 +162,20 @@ static struct list_head chainhash_table[
*/
static int type_filter(struct lock_type *type)
{
- if (type->name_version == 2 &&
- !strcmp(type->name, "xfrm_state_afinfo_lock"))
+ if (type->name_version == 1 &&
+ !strcmp(type->name, "&rl->lock"))
+ return 1;
+ if (type->name_version == 1 &&
+ !strcmp(type->name, "&ni->mrec_lock"))
return 1;
- if ((type->name_version == 2 || type->name_version == 4) &&
- !strcmp(type->name, "&mc->mca_lock"))
+ if (type->name_version == 1 &&
+ !strcmp(type->name, "mft_ni_runlist_lock"))
+ return 1;
+ if (type->name_version == 1 &&
+ !strcmp(type->name, "mft_ni_mrec_lock"))
+ return 1;
+ if (type->name_version == 1 &&
+ !strcmp(type->name, "&vol->lcnbmp_lock"))
return 1;
return 0;
}
@@ -662,6 +687,13 @@ check_noncircular(struct lock_type *sour
return 1;
}
+static int very_verbose(struct lock_type *type)
+{
+#if VERY_VERBOSE
+ return type_filter(type);
+#endif
+ return 0;
+}
#ifdef CONFIG_TRACE_IRQFLAGS
/*
@@ -1025,9 +1057,10 @@ check_prev_add(struct task_struct *curr,
*/
if (verbose(prev->type) || verbose(next->type)) {
__raw_spin_unlock(&hash_lock);
- print_lock_name_field(prev->type);
+ printk("\n new dependency: ");
+ print_lock_name(prev->type);
printk(" => ");
- print_lock_name_field(next->type);
+ print_lock_name(next->type);
printk("\n");
dump_stack();
__raw_spin_lock(&hash_lock);
@@ -1261,7 +1294,7 @@ register_lock_type(struct lockdep_map *l
if (verbose(type)) {
__raw_spin_unlock(&hash_lock);
- printk("new type %p: %s", type->key, type->name);
+ printk("\nnew type %p: %s", type->key, type->name);
if (type->name_version > 1)
printk("#%d", type->name_version);
printk("\n");
@@ -2028,6 +2061,13 @@ static int __lockdep_acquire(struct lock
return 0;
}
debug_atomic_inc((atomic_t *)&type->ops);
+ if (very_verbose(type)) {
+ printk("\nacquire type [%p] %s", type->key, type->name);
+ if (type->name_version > 1)
+ printk("#%d", type->name_version);
+ printk("\n");
+ dump_stack();
+ }
/*
* Add the lock to the list of currently held locks.
@@ -2441,9 +2481,6 @@ void lockdep_acquire(struct lockdep_map
{
unsigned long flags;
- if (LOCKDEP_OFF)
- return;
-
raw_local_irq_save(flags);
check_flags(flags);
@@ -2462,9 +2499,6 @@ void lockdep_release(struct lockdep_map
{
unsigned long flags;
- if (LOCKDEP_OFF)
- return;
-
raw_local_irq_save(flags);
check_flags(flags);
if (unlikely(current->lockdep_recursion))
_
Patches currently in -mm which might be from mingo@xxxxxxx are
origin.patch
disable-debugging-version-of-write_lock.patch
fix-drivers-mfd-ucb1x00-corec-irq-probing-bug.patch
cifs-remove-f_ownerlock-use.patch
lock-validator-fix-ns83820c-irq-flags-bug.patch
revert-gregkh-pci-pci-test-that-drivers-properly-call-pci_set_master.patch
x86-re-enable-generic-numa.patch
vdso-randomize-the-i386-vdso-by-moving-it-into-a-vma.patch
vdso-randomize-the-i386-vdso-by-moving-it-into-a-vma-tidy.patch
vdso-randomize-the-i386-vdso-by-moving-it-into-a-vma-arch_vma_name-fix.patch
vdso-randomize-the-i386-vdso-by-moving-it-into-a-vma-vs-x86_64-mm-reliable-stack-trace-support-i386.patch
vdso-randomize-the-i386-vdso-by-moving-it-into-a-vma-vs-x86_64-mm-reliable-stack-trace-support-i386-2.patch
vdso-randomize-the-i386-vdso-by-moving-it-into-a-vma-vs-x86_64-mm-reliable-stack-trace-support-i386-2-revert-maxmem-change.patch
work-around-ppc64-bootup-bug-by-making-mutex-debugging-save-restore-irqs.patch
kernel-kernel-cpuc-to-mutexes.patch
define-__raw_get_cpu_var-and-use-it.patch
ide-cd-end-of-media-error-fix.patch
spin-rwlock-init-cleanups.patch
lock-validator-introduce-warn_on_oncecond.patch
lock-validator-introduce-warn_on_oncecond-speedup.patch
emu10k1-mark-midi_spinlock-as-used.patch
epoll-use-unlocked-wqueue-operations.patch
reintegrate-irqreturnh-into-hardirqh.patch
time-clocksource-infrastructure.patch
sched-fix-smt-nice-lock-contention-and-optimization.patch
sched-fix-smt-nice-lock-contention-and-optimization-tidy.patch
sched-comment-bitmap-size-accounting.patch
sched-fix-interactive-ceiling-code.patch
sched-cpu-hotplug-race-vs-set_cpus_allowed.patch
sched-implement-smpnice.patch
sched-protect-calculation-of-max_pull-from-integer-wrap.patch
sched-store-weighted-load-on-up.patch
sched-add-discrete-weighted-cpu-load-function.patch
sched-prevent-high-load-weight-tasks-suppressing-balancing.patch
sched-improve-stability-of-smpnice-load-balancing.patch
sched-improve-smpnice-load-balancing-when-load-per-task.patch
smpnice-dont-consider-sched-groups-which-are-lightly-loaded-for-balancing.patch
smpnice-dont-consider-sched-groups-which-are-lightly-loaded-for-balancing-fix.patch
sched-modify-move_tasks-to-improve-load-balancing-outcomes.patch
sched-avoid-unnecessarily-moving-highest-priority-task-move_tasks.patch
sched-avoid-unnecessarily-moving-highest-priority-task-move_tasks-fix-2.patch
sched_domain-handle-kmalloc-failure.patch
sched_domain-handle-kmalloc-failure-fix.patch
sched_domain-dont-use-gfp_atomic.patch
sched_domain-use-kmalloc_node.patch
sched_domain-allocate-sched_group-structures-dynamically.patch
sched-mc-smt-power-savings-sched-policy.patch
sched_exit-fix-parent-time_slice-calculation.patch
sched_exit-move-the-callsite-to-do_exit.patch
sched-uninline-task_rq_lock.patch
bug-if-setscheduler-is-called-from-interrupt-context.patch
sched-add-above-background-load-function.patch
mm-implement-swap-prefetching.patch
pi-futex-futex-code-cleanups.patch
pi-futex-robust-futex-docs-fix.patch
pi-futex-introduce-debug_check_no_locks_freed.patch
pi-futex-introduce-warn_on_smp.patch
pi-futex-add-plist-implementation.patch
pi-futex-scheduler-support-for-pi.patch
pi-futex-rt-mutex-core.patch
pi-futex-rt-mutex-docs.patch
pi-futex-rt-mutex-docs-update.patch
pi-futex-rt-mutex-debug.patch
pi-futex-rt-mutex-tester.patch
pi-futex-rt-mutex-tester-fix.patch
pi-futex-rt-mutex-futex-api.patch
pi-futex-futex_lock_pi-futex_unlock_pi-support.patch
pi-futex-futex_lock_pi-futex_unlock_pi-support-fix.patch
rtmutex-modify-rtmutex-tester-to-test-the-setscheduler.patch
futex_requeue-optimization.patch
fix-ide-deadlock-in-error-reporting-code.patch
genirq-rename-desc-handler-to-desc-chip.patch
genirq-rename-desc-handler-to-desc-chip-power-fix.patch
genirq-rename-desc-handler-to-desc-chip-ia64-fix.patch
genirq-rename-desc-handler-to-desc-chip-ia64-fix-2.patch
genirq-rename-desc-handler-to-desc-chip-terminate_irqs-fix.patch
genirq-sem2mutex-probe_sem-probing_active.patch
genirq-cleanup-merge-irq_affinity-into-irq_desc.patch
genirq-cleanup-remove-irq_descp.patch
genirq-cleanup-remove-irq_descp-fix.patch
genirq-cleanup-remove-fastcall.patch
genirq-cleanup-misc-code-cleanups.patch
genirq-cleanup-reduce-irq_desc_t-use-mark-it-obsolete.patch
genirq-cleanup-include-linux-irqh.patch
genirq-cleanup-merge-irq_dir-smp_affinity_entry-into-irq_desc.patch
genirq-cleanup-merge-pending_irq_cpumask-into-irq_desc.patch
genirq-cleanup-turn-arch_has_irq_per_cpu-into-config_irq_per_cpu.patch
genirq-debug-better-debug-printout-in-enable_irq.patch
genirq-add-retrigger-irq-op-to-consolidate-hw_irq_resend.patch
genirq-doc-comment-include-linux-irqh-structures.patch
genirq-doc-handle_irq_event-and-__do_irq-comments.patch
genirq-cleanup-no_irq_type-cleanups.patch
genirq-doc-add-design-documentation.patch
genirq-add-genirq-sw-irq-retrigger.patch
genirq-add-irq_noprobe-support.patch
genirq-add-irq_norequest-support.patch
genirq-add-irq_noautoen-support.patch
genirq-update-copyrights.patch
genirq-core.patch
genirq-msi-fixes-2.patch
genirq-add-irq-chip-support.patch
genirq-add-irq-chip-support-fix.patch
genirq-add-irq-chip-support-misroute-irq-dont-call-desc-chip-end.patch
genirq-add-handle_bad_irq.patch
genirq-add-irq-wake-power-management-support.patch
genirq-add-sa_trigger-support.patch
genirq-cleanup-no_irq_type-no_irq_chip-rename.patch
genirq-more-verbose-debugging-on-unexpected-irq-vectors.patch
genirq-ia64-build-fix.patch
genirq-add-irq_type_sense_mask.patch
genirq-add-irq-chip-support-fasteoi-handler-handle-interrupt-disabling.patch
genirq-irq-document-what-an-irq-is.patch
genirq-add-chip-eoi-fastack-fasteoi-core.patch
genirq-add-chip-eoi-fastack-fasteoi-fix.patch
acpi-reduce-code-size-clean-up-fix-validator-message.patch
lock-validator-special-locking-kgdb.patch
detect-atomic-counter-underflows.patch
debug-shared-irqs.patch
make-frame_pointer-default=y.patch
mutex-subsystem-synchro-test-module.patch
vdso-print-fatal-signals.patch
vdso-improve-print_fatal_signals-support-by-adding-memory-maps.patch
-
To unsubscribe from this list: send the line "unsubscribe mm-commits" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
