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x86, ticketlock: Collapse a layer of functions 

Now that the paravirtualization layer doesn't exist at the spinlock
level any more, we can collapse the __ticket_ functions into the arch_
functions.

Signed-off-by: Jeremy Fitzhardinge <jeremy@goop.org>
Link: http://lkml.kernel.org/r/1376058122-8248-4-git-send-email-raghavendra.kt@linux.vnet.ibm.com
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Tested-by: Attilio Rao <attilio.rao@citrix.com>
Signed-off-by: Raghavendra K T <raghavendra.kt@linux.vnet.ibm.com>
Acked-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
hifive-unleashed-5.1
Jeremy Fitzhardinge 2013-08-09 19:51:51 +05:30 committed by H. Peter Anvin
parent 8db732668a
commit b798df09f9
1 changed files with 5 additions and 30 deletions
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35
arch/x86/include/asm/spinlock.h
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@ -76,7 +76,7 @@ static __always_inline void __ticket_unlock_kick(struct arch_spinlock *lock,
* in the high part, because a wide xadd increment of the low part would carry
* up and contaminate the high part.
*/
static __always_inline void __ticket_spin_lock(struct arch_spinlock *lock)
static __always_inline void arch_spin_lock(struct arch_spinlock *lock)
{
register struct __raw_tickets inc = { .tail = 1 };
@ -96,7 +96,7 @@ static __always_inline void __ticket_spin_lock(struct arch_spinlock *lock)
out: barrier(); /* make sure nothing creeps before the lock is taken */
}
static __always_inline int __ticket_spin_trylock(arch_spinlock_t *lock)
static __always_inline int arch_spin_trylock(arch_spinlock_t *lock)
{
arch_spinlock_t old, new;
@ -110,7 +110,7 @@ static __always_inline int __ticket_spin_trylock(arch_spinlock_t *lock)
return cmpxchg(&lock->head_tail, old.head_tail, new.head_tail) == old.head_tail;
}
static __always_inline void __ticket_spin_unlock(arch_spinlock_t *lock)
static __always_inline void arch_spin_unlock(arch_spinlock_t *lock)
{
__ticket_t next = lock->tickets.head + 1;
@ -118,46 +118,21 @@ static __always_inline void __ticket_spin_unlock(arch_spinlock_t *lock)
__ticket_unlock_kick(lock, next);
}
static inline int __ticket_spin_is_locked(arch_spinlock_t *lock)
static inline int arch_spin_is_locked(arch_spinlock_t *lock)
{
struct __raw_tickets tmp = ACCESS_ONCE(lock->tickets);
return tmp.tail != tmp.head;
}
static inline int __ticket_spin_is_contended(arch_spinlock_t *lock)
static inline int arch_spin_is_contended(arch_spinlock_t *lock)
{
struct __raw_tickets tmp = ACCESS_ONCE(lock->tickets);
return (__ticket_t)(tmp.tail - tmp.head) > 1;
}
static inline int arch_spin_is_locked(arch_spinlock_t *lock)
{
return __ticket_spin_is_locked(lock);
}
static inline int arch_spin_is_contended(arch_spinlock_t *lock)
{
return __ticket_spin_is_contended(lock);
}
#define arch_spin_is_contended arch_spin_is_contended
static __always_inline void arch_spin_lock(arch_spinlock_t *lock)
{
__ticket_spin_lock(lock);
}
static __always_inline int arch_spin_trylock(arch_spinlock_t *lock)
{
return __ticket_spin_trylock(lock);
}
static __always_inline void arch_spin_unlock(arch_spinlock_t *lock)
{
__ticket_spin_unlock(lock);
}
static __always_inline void arch_spin_lock_flags(arch_spinlock_t *lock,
unsigned long flags)
{