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

Browse Source 
* 'core-locking-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  lockdep: Reduce stack_trace usage
  lockdep: No need to disable preemption in debug atomic ops
  lockdep: Actually _dec_ in debug_atomic_dec
  lockdep: Provide off case for redundant_hardirqs_on increment
  lockdep: Simplify debug atomic ops
  lockdep: Fix redundant_hardirqs_on incremented with irqs enabled
  lockstat: Make lockstat counting per cpu
  i8253: Convert i8253_lock to raw_spinlock
This commit is contained in:
Linus Torvalds 2010-05-18 08:17:35 -07:00
commit 1014cfe2fb
15 changed files with 157 additions and 122 deletions
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2
arch/mips/include/asm/i8253.h
View File

@ -12,7 +12,7 @@
#define PIT_CH0 0x40
#define PIT_CH2 0x42
extern spinlock_t i8253_lock;
extern raw_spinlock_t i8253_lock;
extern void setup_pit_timer(void);

14
arch/mips/kernel/i8253.c
View File

@ -15,7 +15,7 @@
#include <asm/io.h>
#include <asm/time.h>
DEFINE_SPINLOCK(i8253_lock);
DEFINE_RAW_SPINLOCK(i8253_lock);
EXPORT_SYMBOL(i8253_lock);
/*
@ -26,7 +26,7 @@ EXPORT_SYMBOL(i8253_lock);
static void init_pit_timer(enum clock_event_mode mode,
struct clock_event_device *evt)
{
spin_lock(&i8253_lock);
raw_spin_lock(&i8253_lock);
switch(mode) {
case CLOCK_EVT_MODE_PERIODIC:
@ -55,7 +55,7 @@ static void init_pit_timer(enum clock_event_mode mode,
/* Nothing to do here */
break;
}
spin_unlock(&i8253_lock);
raw_spin_unlock(&i8253_lock);
}
/*
@ -65,10 +65,10 @@ static void init_pit_timer(enum clock_event_mode mode,
*/
static int pit_next_event(unsigned long delta, struct clock_event_device *evt)
{
spin_lock(&i8253_lock);
raw_spin_lock(&i8253_lock);
outb_p(delta & 0xff , PIT_CH0); /* LSB */
outb(delta >> 8 , PIT_CH0); /* MSB */
spin_unlock(&i8253_lock);
raw_spin_unlock(&i8253_lock);
return 0;
}
@ -137,7 +137,7 @@ static cycle_t pit_read(struct clocksource *cs)
static int old_count;
static u32 old_jifs;
spin_lock_irqsave(&i8253_lock, flags);
raw_spin_lock_irqsave(&i8253_lock, flags);
/*
* Although our caller may have the read side of xtime_lock,
* this is now a seqlock, and we are cheating in this routine
@ -183,7 +183,7 @@ static cycle_t pit_read(struct clocksource *cs)
old_count = count;
old_jifs = jifs;
spin_unlock_irqrestore(&i8253_lock, flags);
raw_spin_unlock_irqrestore(&i8253_lock, flags);
count = (LATCH - 1) - count;

2
arch/x86/include/asm/i8253.h
View File

@ -6,7 +6,7 @@
#define PIT_CH0 0x40
#define PIT_CH2 0x42
extern spinlock_t i8253_lock;
extern raw_spinlock_t i8253_lock;
extern struct clock_event_device *global_clock_event;

4
arch/x86/kernel/apm_32.c
View File

@ -1224,7 +1224,7 @@ static void reinit_timer(void)
#ifdef INIT_TIMER_AFTER_SUSPEND
unsigned long flags;
spin_lock_irqsave(&i8253_lock, flags);
raw_spin_lock_irqsave(&i8253_lock, flags);
/* set the clock to HZ */
outb_pit(0x34, PIT_MODE); /* binary, mode 2, LSB/MSB, ch 0 */
udelay(10);
@ -1232,7 +1232,7 @@ static void reinit_timer(void)
udelay(10);
outb_pit(LATCH >> 8, PIT_CH0); /* MSB */
udelay(10);
spin_unlock_irqrestore(&i8253_lock, flags);
raw_spin_unlock_irqrestore(&i8253_lock, flags);
#endif
}

14
arch/x86/kernel/i8253.c
View File

@ -16,7 +16,7 @@
#include <asm/hpet.h>
#include <asm/smp.h>
DEFINE_SPINLOCK(i8253_lock);
DEFINE_RAW_SPINLOCK(i8253_lock);
EXPORT_SYMBOL(i8253_lock);
/*
@ -33,7 +33,7 @@ struct clock_event_device *global_clock_event;
static void init_pit_timer(enum clock_event_mode mode,
struct clock_event_device *evt)
{
spin_lock(&i8253_lock);
raw_spin_lock(&i8253_lock);
switch (mode) {
case CLOCK_EVT_MODE_PERIODIC:
@ -62,7 +62,7 @@ static void init_pit_timer(enum clock_event_mode mode,
/* Nothing to do here */
break;
}
spin_unlock(&i8253_lock);
raw_spin_unlock(&i8253_lock);
}
/*
@ -72,10 +72,10 @@ static void init_pit_timer(enum clock_event_mode mode,
*/
static int pit_next_event(unsigned long delta, struct clock_event_device *evt)
{
spin_lock(&i8253_lock);
raw_spin_lock(&i8253_lock);
outb_pit(delta & 0xff , PIT_CH0); /* LSB */
outb_pit(delta >> 8 , PIT_CH0); /* MSB */
spin_unlock(&i8253_lock);
raw_spin_unlock(&i8253_lock);
return 0;
}
@ -130,7 +130,7 @@ static cycle_t pit_read(struct clocksource *cs)
int count;
u32 jifs;
spin_lock_irqsave(&i8253_lock, flags);
raw_spin_lock_irqsave(&i8253_lock, flags);
/*
* Although our caller may have the read side of xtime_lock,
* this is now a seqlock, and we are cheating in this routine
@ -176,7 +176,7 @@ static cycle_t pit_read(struct clocksource *cs)
old_count = count;
old_jifs = jifs;
spin_unlock_irqrestore(&i8253_lock, flags);
raw_spin_unlock_irqrestore(&i8253_lock, flags);
count = (LATCH - 1) - count;

4
drivers/block/hd.c
View File

@ -164,12 +164,12 @@ unsigned long read_timer(void)
unsigned long t, flags;
int i;
spin_lock_irqsave(&i8253_lock, flags);
raw_spin_lock_irqsave(&i8253_lock, flags);
t = jiffies * 11932;
outb_p(0, 0x43);
i = inb_p(0x40);
i |= inb(0x40) << 8;
spin_unlock_irqrestore(&i8253_lock, flags);
raw_spin_unlock_irqrestore(&i8253_lock, flags);
return(t - i);
}
#endif

4
drivers/input/gameport/gameport.c
View File

@ -59,11 +59,11 @@ static unsigned int get_time_pit(void)
unsigned long flags;
unsigned int count;
spin_lock_irqsave(&i8253_lock, flags);
raw_spin_lock_irqsave(&i8253_lock, flags);
outb_p(0x00, 0x43);
count = inb_p(0x40);
count |= inb_p(0x40) << 8;
spin_unlock_irqrestore(&i8253_lock, flags);
raw_spin_unlock_irqrestore(&i8253_lock, flags);
return count;
}

4
drivers/input/joystick/analog.c
View File

@ -146,11 +146,11 @@ static unsigned int get_time_pit(void)
unsigned long flags;
unsigned int count;
spin_lock_irqsave(&i8253_lock, flags);
raw_spin_lock_irqsave(&i8253_lock, flags);
outb_p(0x00, 0x43);
count = inb_p(0x40);
count |= inb_p(0x40) << 8;
spin_unlock_irqrestore(&i8253_lock, flags);
raw_spin_unlock_irqrestore(&i8253_lock, flags);
return count;
}

6
drivers/input/misc/pcspkr.c
View File

@ -30,7 +30,7 @@ MODULE_ALIAS("platform:pcspkr");
#include <asm/i8253.h>
#else
#include <asm/8253pit.h>
static DEFINE_SPINLOCK(i8253_lock);
static DEFINE_RAW_SPINLOCK(i8253_lock);
#endif
static int pcspkr_event(struct input_dev *dev, unsigned int type, unsigned int code, int value)
@ -50,7 +50,7 @@ static int pcspkr_event(struct input_dev *dev, unsigned int type, unsigned int c
if (value > 20 && value < 32767)
count = PIT_TICK_RATE / value;
spin_lock_irqsave(&i8253_lock, flags);
raw_spin_lock_irqsave(&i8253_lock, flags);
if (count) {
/* set command for counter 2, 2 byte write */
@ -65,7 +65,7 @@ static int pcspkr_event(struct input_dev *dev, unsigned int type, unsigned int c
outb(inb_p(0x61) & 0xFC, 0x61);
}
spin_unlock_irqrestore(&i8253_lock, flags);
raw_spin_unlock_irqrestore(&i8253_lock, flags);
return 0;
}

81
kernel/lockdep.c
View File

@ -431,20 +431,7 @@ static struct stack_trace lockdep_init_trace = {
/*
* Various lockdep statistics:
*/
atomic_t chain_lookup_hits;
atomic_t chain_lookup_misses;
atomic_t hardirqs_on_events;
atomic_t hardirqs_off_events;
atomic_t redundant_hardirqs_on;
atomic_t redundant_hardirqs_off;
atomic_t softirqs_on_events;
atomic_t softirqs_off_events;
atomic_t redundant_softirqs_on;
atomic_t redundant_softirqs_off;
atomic_t nr_unused_locks;
atomic_t nr_cyclic_checks;
atomic_t nr_find_usage_forwards_checks;
atomic_t nr_find_usage_backwards_checks;
DEFINE_PER_CPU(struct lockdep_stats, lockdep_stats);
#endif
/*
@ -748,7 +735,7 @@ register_lock_class(struct lockdep_map *lock, unsigned int subclass, int force)
return NULL;
}
class = lock_classes + nr_lock_classes++;
debug_atomic_inc(&nr_unused_locks);
debug_atomic_inc(nr_unused_locks);
class->key = key;
class->name = lock->name;
class->subclass = subclass;
@ -818,7 +805,8 @@ static struct lock_list *alloc_list_entry(void)
* Add a new dependency to the head of the list:
*/
static int add_lock_to_list(struct lock_class *class, struct lock_class *this,
struct list_head *head, unsigned long ip, int distance)
struct list_head *head, unsigned long ip,
int distance, struct stack_trace *trace)
{
struct lock_list *entry;
/*
@ -829,11 +817,9 @@ static int add_lock_to_list(struct lock_class *class, struct lock_class *this,
if (!entry)
return 0;
if (!save_trace(&entry->trace))
return 0;
entry->class = this;
entry->distance = distance;
entry->trace = *trace;
/*
* Since we never remove from the dependency list, the list can
* be walked lockless by other CPUs, it's only allocation
@ -1205,7 +1191,7 @@ check_noncircular(struct lock_list *root, struct lock_class *target,
{
int result;
debug_atomic_inc(&nr_cyclic_checks);
debug_atomic_inc(nr_cyclic_checks);
result = __bfs_forwards(root, target, class_equal, target_entry);
@ -1242,7 +1228,7 @@ find_usage_forwards(struct lock_list *root, enum lock_usage_bit bit,
{
int result;
debug_atomic_inc(&nr_find_usage_forwards_checks);
debug_atomic_inc(nr_find_usage_forwards_checks);
result = __bfs_forwards(root, (void *)bit, usage_match, target_entry);
@ -1265,7 +1251,7 @@ find_usage_backwards(struct lock_list *root, enum lock_usage_bit bit,
{
int result;
debug_atomic_inc(&nr_find_usage_backwards_checks);
debug_atomic_inc(nr_find_usage_backwards_checks);
result = __bfs_backwards(root, (void *)bit, usage_match, target_entry);
@ -1635,12 +1621,20 @@ check_deadlock(struct task_struct *curr, struct held_lock *next,
*/
static int
check_prev_add(struct task_struct *curr, struct held_lock *prev,
struct held_lock *next, int distance)
struct held_lock *next, int distance, int trylock_loop)
{
struct lock_list *entry;
int ret;
struct lock_list this;
struct lock_list *uninitialized_var(target_entry);
/*
* Static variable, serialized by the graph_lock().
*
* We use this static variable to save the stack trace in case
* we call into this function multiple times due to encountering
* trylocks in the held lock stack.
*/
static struct stack_trace trace;
/*
* Prove that the new <prev> -> <next> dependency would not
@ -1688,20 +1682,23 @@ check_prev_add(struct task_struct *curr, struct held_lock *prev,
}
}
if (!trylock_loop && !save_trace(&trace))
return 0;
/*
* Ok, all validations passed, add the new lock
* to the previous lock's dependency list:
*/
ret = add_lock_to_list(hlock_class(prev), hlock_class(next),
&hlock_class(prev)->locks_after,
next->acquire_ip, distance);
next->acquire_ip, distance, &trace);
if (!ret)
return 0;
ret = add_lock_to_list(hlock_class(next), hlock_class(prev),
&hlock_class(next)->locks_before,
next->acquire_ip, distance);
next->acquire_ip, distance, &trace);
if (!ret)
return 0;
@ -1731,6 +1728,7 @@ static int
check_prevs_add(struct task_struct *curr, struct held_lock *next)
{
int depth = curr->lockdep_depth;
int trylock_loop = 0;
struct held_lock *hlock;
/*
@ -1756,7 +1754,8 @@ check_prevs_add(struct task_struct *curr, struct held_lock *next)
* added:
*/
if (hlock->read != 2) {
if (!check_prev_add(curr, hlock, next, distance))
if (!check_prev_add(curr, hlock, next,
distance, trylock_loop))
return 0;
/*
* Stop after the first non-trylock entry,
@ -1779,6 +1778,7 @@ check_prevs_add(struct task_struct *curr, struct held_lock *next)
if (curr->held_locks[depth].irq_context !=
curr->held_locks[depth-1].irq_context)
break;
trylock_loop = 1;
}
return 1;
out_bug:
@ -1825,7 +1825,7 @@ static inline int lookup_chain_cache(struct task_struct *curr,
list_for_each_entry(chain, hash_head, entry) {
if (chain->chain_key == chain_key) {
cache_hit:
debug_atomic_inc(&chain_lookup_hits);
debug_atomic_inc(chain_lookup_hits);
if (very_verbose(class))
printk("\nhash chain already cached, key: "
"%016Lx tail class: [%p] %s\n",
@ -1890,7 +1890,7 @@ cache_hit:
chain_hlocks[chain->base + j] = class - lock_classes;
}
list_add_tail_rcu(&chain->entry, hash_head);
debug_atomic_inc(&chain_lookup_misses);
debug_atomic_inc(chain_lookup_misses);
inc_chains();
return 1;
@ -2311,7 +2311,12 @@ void trace_hardirqs_on_caller(unsigned long ip)
return;
if (unlikely(curr->hardirqs_enabled)) {
debug_atomic_inc(&redundant_hardirqs_on);
/*
* Neither irq nor preemption are disabled here
* so this is racy by nature but loosing one hit
* in a stat is not a big deal.
*/
__debug_atomic_inc(redundant_hardirqs_on);
return;
}
/* we'll do an OFF -> ON transition: */
@ -2338,7 +2343,7 @@ void trace_hardirqs_on_caller(unsigned long ip)
curr->hardirq_enable_ip = ip;
curr->hardirq_enable_event = ++curr->irq_events;
debug_atomic_inc(&hardirqs_on_events);
debug_atomic_inc(hardirqs_on_events);
}
EXPORT_SYMBOL(trace_hardirqs_on_caller);
@ -2370,9 +2375,9 @@ void trace_hardirqs_off_caller(unsigned long ip)
curr->hardirqs_enabled = 0;
curr->hardirq_disable_ip = ip;
curr->hardirq_disable_event = ++curr->irq_events;
debug_atomic_inc(&hardirqs_off_events);
debug_atomic_inc(hardirqs_off_events);
} else
debug_atomic_inc(&redundant_hardirqs_off);
debug_atomic_inc(redundant_hardirqs_off);
}
EXPORT_SYMBOL(trace_hardirqs_off_caller);
@ -2396,7 +2401,7 @@ void trace_softirqs_on(unsigned long ip)
return;
if (curr->softirqs_enabled) {
debug_atomic_inc(&redundant_softirqs_on);
debug_atomic_inc(redundant_softirqs_on);
return;
}
@ -2406,7 +2411,7 @@ void trace_softirqs_on(unsigned long ip)
curr->softirqs_enabled = 1;
curr->softirq_enable_ip = ip;
curr->softirq_enable_event = ++curr->irq_events;
debug_atomic_inc(&softirqs_on_events);
debug_atomic_inc(softirqs_on_events);
/*
* We are going to turn softirqs on, so set the
* usage bit for all held locks, if hardirqs are
@ -2436,10 +2441,10 @@ void trace_softirqs_off(unsigned long ip)
curr->softirqs_enabled = 0;
curr->softirq_disable_ip = ip;
curr->softirq_disable_event = ++curr->irq_events;
debug_atomic_inc(&softirqs_off_events);
debug_atomic_inc(softirqs_off_events);
DEBUG_LOCKS_WARN_ON(!softirq_count());
} else
debug_atomic_inc(&redundant_softirqs_off);
debug_atomic_inc(redundant_softirqs_off);
}
static void __lockdep_trace_alloc(gfp_t gfp_mask, unsigned long flags)
@ -2644,7 +2649,7 @@ static int mark_lock(struct task_struct *curr, struct held_lock *this,
return 0;
break;
case LOCK_USED:
debug_atomic_dec(&nr_unused_locks);
debug_atomic_dec(nr_unused_locks);
break;
default:
if (!debug_locks_off_graph_unlock())
@ -2750,7 +2755,7 @@ static int __lock_acquire(struct lockdep_map *lock, unsigned int subclass,
if (!class)
return 0;
}
debug_atomic_inc((atomic_t *)&class->ops);
atomic_inc((atomic_t *)&class->ops);
if (very_verbose(class)) {
printk("\nacquire class [%p] %s", class->key, class->name);
if (class->name_version > 1)

72
kernel/lockdep_internals.h
View File

@ -110,30 +110,60 @@ lockdep_count_backward_deps(struct lock_class *class)
#endif
#ifdef CONFIG_DEBUG_LOCKDEP
#include <asm/local.h>
/*
* Various lockdep statistics:
* Various lockdep statistics.
* We want them per cpu as they are often accessed in fast path
* and we want to avoid too much cache bouncing.
*/
extern atomic_t chain_lookup_hits;
extern atomic_t chain_lookup_misses;
extern atomic_t hardirqs_on_events;
extern atomic_t hardirqs_off_events;
extern atomic_t redundant_hardirqs_on;
extern atomic_t redundant_hardirqs_off;
extern atomic_t softirqs_on_events;
extern atomic_t softirqs_off_events;
extern atomic_t redundant_softirqs_on;
extern atomic_t redundant_softirqs_off;
extern atomic_t nr_unused_locks;
extern atomic_t nr_cyclic_checks;
extern atomic_t nr_cyclic_check_recursions;
extern atomic_t nr_find_usage_forwards_checks;
extern atomic_t nr_find_usage_forwards_recursions;
extern atomic_t nr_find_usage_backwards_checks;
extern atomic_t nr_find_usage_backwards_recursions;
# define debug_atomic_inc(ptr) atomic_inc(ptr)
# define debug_atomic_dec(ptr) atomic_dec(ptr)
# define debug_atomic_read(ptr) atomic_read(ptr)
struct lockdep_stats {
int chain_lookup_hits;
int chain_lookup_misses;
int hardirqs_on_events;
int hardirqs_off_events;
int redundant_hardirqs_on;
int redundant_hardirqs_off;
int softirqs_on_events;
int softirqs_off_events;
int redundant_softirqs_on;
int redundant_softirqs_off;
int nr_unused_locks;
int nr_cyclic_checks;
int nr_cyclic_check_recursions;
int nr_find_usage_forwards_checks;
int nr_find_usage_forwards_recursions;
int nr_find_usage_backwards_checks;
int nr_find_usage_backwards_recursions;
};
DECLARE_PER_CPU(struct lockdep_stats, lockdep_stats);
#define __debug_atomic_inc(ptr) \
this_cpu_inc(lockdep_stats.ptr);
#define debug_atomic_inc(ptr) { \
WARN_ON_ONCE(!irqs_disabled()); \
__this_cpu_inc(lockdep_stats.ptr); \
}
#define debug_atomic_dec(ptr) { \
WARN_ON_ONCE(!irqs_disabled()); \
__this_cpu_dec(lockdep_stats.ptr); \
}
#define debug_atomic_read(ptr) ({ \
struct lockdep_stats *__cpu_lockdep_stats; \
unsigned long long __total = 0; \
int __cpu; \
for_each_possible_cpu(__cpu) { \
__cpu_lockdep_stats = &per_cpu(lockdep_stats, __cpu); \
__total += __cpu_lockdep_stats->ptr; \
} \
__total; \
})
#else
# define __debug_atomic_inc(ptr) do { } while (0)
# define debug_atomic_inc(ptr) do { } while (0)
# define debug_atomic_dec(ptr) do { } while (0)
# define debug_atomic_read(ptr) 0

54
kernel/lockdep_proc.c
View File

@ -184,34 +184,34 @@ static const struct file_operations proc_lockdep_chains_operations = {
static void lockdep_stats_debug_show(struct seq_file *m)
{
#ifdef CONFIG_DEBUG_LOCKDEP
unsigned int hi1 = debug_atomic_read(&hardirqs_on_events),
hi2 = debug_atomic_read(&hardirqs_off_events),
hr1 = debug_atomic_read(&redundant_hardirqs_on),
hr2 = debug_atomic_read(&redundant_hardirqs_off),
si1 = debug_atomic_read(&softirqs_on_events),
si2 = debug_atomic_read(&softirqs_off_events),
sr1 = debug_atomic_read(&redundant_softirqs_on),
sr2 = debug_atomic_read(&redundant_softirqs_off);
unsigned long long hi1 = debug_atomic_read(hardirqs_on_events),
hi2 = debug_atomic_read(hardirqs_off_events),
hr1 = debug_atomic_read(redundant_hardirqs_on),
hr2 = debug_atomic_read(redundant_hardirqs_off),
si1 = debug_atomic_read(softirqs_on_events),
si2 = debug_atomic_read(softirqs_off_events),
sr1 = debug_atomic_read(redundant_softirqs_on),
sr2 = debug_atomic_read(redundant_softirqs_off);
seq_printf(m, " chain lookup misses: %11u\n",
debug_atomic_read(&chain_lookup_misses));
seq_printf(m, " chain lookup hits: %11u\n",
debug_atomic_read(&chain_lookup_hits));
seq_printf(m, " cyclic checks: %11u\n",
debug_atomic_read(&nr_cyclic_checks));
seq_printf(m, " find-mask forwards checks: %11u\n",
debug_atomic_read(&nr_find_usage_forwards_checks));
seq_printf(m, " find-mask backwards checks: %11u\n",
debug_atomic_read(&nr_find_usage_backwards_checks));
seq_printf(m, " chain lookup misses: %11llu\n",
debug_atomic_read(chain_lookup_misses));
seq_printf(m, " chain lookup hits: %11llu\n",
debug_atomic_read(chain_lookup_hits));
seq_printf(m, " cyclic checks: %11llu\n",
debug_atomic_read(nr_cyclic_checks));
seq_printf(m, " find-mask forwards checks: %11llu\n",
debug_atomic_read(nr_find_usage_forwards_checks));
seq_printf(m, " find-mask backwards checks: %11llu\n",
debug_atomic_read(nr_find_usage_backwards_checks));
seq_printf(m, " hardirq on events: %11u\n", hi1);
seq_printf(m, " hardirq off events: %11u\n", hi2);
seq_printf(m, " redundant hardirq ons: %11u\n", hr1);
seq_printf(m, " redundant hardirq offs: %11u\n", hr2);
seq_printf(m, " softirq on events: %11u\n", si1);
seq_printf(m, " softirq off events: %11u\n", si2);
seq_printf(m, " redundant softirq ons: %11u\n", sr1);
seq_printf(m, " redundant softirq offs: %11u\n", sr2);
seq_printf(m, " hardirq on events: %11llu\n", hi1);
seq_printf(m, " hardirq off events: %11llu\n", hi2);
seq_printf(m, " redundant hardirq ons: %11llu\n", hr1);
seq_printf(m, " redundant hardirq offs: %11llu\n", hr2);
seq_printf(m, " softirq on events: %11llu\n", si1);
seq_printf(m, " softirq off events: %11llu\n", si2);
seq_printf(m, " redundant softirq ons: %11llu\n", sr1);
seq_printf(m, " redundant softirq offs: %11llu\n", sr2);
#endif
}
@ -263,7 +263,7 @@ static int lockdep_stats_show(struct seq_file *m, void *v)
#endif
}
#ifdef CONFIG_DEBUG_LOCKDEP
DEBUG_LOCKS_WARN_ON(debug_atomic_read(&nr_unused_locks) != nr_unused);
DEBUG_LOCKS_WARN_ON(debug_atomic_read(nr_unused_locks) != nr_unused);
#endif
seq_printf(m, " lock-classes: %11lu [max: %lu]\n",
nr_lock_classes, MAX_LOCKDEP_KEYS);

2
sound/drivers/pcsp/pcsp.h
View File

@ -16,7 +16,7 @@
#include <asm/i8253.h>
#else
#include <asm/8253pit.h>
static DEFINE_SPINLOCK(i8253_lock);
static DEFINE_RAW_SPINLOCK(i8253_lock);
#endif
#define PCSP_SOUND_VERSION 0x400 /* read 4.00 */

4
sound/drivers/pcsp/pcsp_input.c
View File

@ -21,7 +21,7 @@ static void pcspkr_do_sound(unsigned int count)
{
unsigned long flags;
spin_lock_irqsave(&i8253_lock, flags);
raw_spin_lock_irqsave(&i8253_lock, flags);
if (count) {
/* set command for counter 2, 2 byte write */
@ -36,7 +36,7 @@ static void pcspkr_do_sound(unsigned int count)
outb(inb_p(0x61) & 0xFC, 0x61);
}
spin_unlock_irqrestore(&i8253_lock, flags);
raw_spin_unlock_irqrestore(&i8253_lock, flags);
}
void pcspkr_stop_sound(void)

12
sound/drivers/pcsp/pcsp_lib.c
View File

@ -66,7 +66,7 @@ static u64 pcsp_timer_update(struct snd_pcsp *chip)
timer_cnt = val * CUR_DIV() / 256;
if (timer_cnt && chip->enable) {
spin_lock_irqsave(&i8253_lock, flags);
raw_spin_lock_irqsave(&i8253_lock, flags);
if (!nforce_wa) {
outb_p(chip->val61, 0x61);
outb_p(timer_cnt, 0x42);
@ -75,7 +75,7 @@ static u64 pcsp_timer_update(struct snd_pcsp *chip)
outb(chip->val61 ^ 2, 0x61);
chip->thalf = 1;
}
spin_unlock_irqrestore(&i8253_lock, flags);
raw_spin_unlock_irqrestore(&i8253_lock, flags);
}
chip->ns_rem = PCSP_PERIOD_NS();
@ -159,10 +159,10 @@ static int pcsp_start_playing(struct snd_pcsp *chip)
return -EIO;
}
spin_lock(&i8253_lock);
raw_spin_lock(&i8253_lock);
chip->val61 = inb(0x61) | 0x03;
outb_p(0x92, 0x43); /* binary, mode 1, LSB only, ch 2 */
spin_unlock(&i8253_lock);
raw_spin_unlock(&i8253_lock);
atomic_set(&chip->timer_active, 1);
chip->thalf = 0;
@ -179,11 +179,11 @@ static void pcsp_stop_playing(struct snd_pcsp *chip)
return;
atomic_set(&chip->timer_active, 0);
spin_lock(&i8253_lock);
raw_spin_lock(&i8253_lock);
/* restore the timer */
outb_p(0xb6, 0x43); /* binary, mode 3, LSB/MSB, ch 2 */
outb(chip->val61 & 0xFC, 0x61);
spin_unlock(&i8253_lock);
raw_spin_unlock(&i8253_lock);
}
/*