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Subject[PATCH RFC V6 3/11] x86/ticketlock: collapse a layer of functions
From: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>

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.fitzhardinge@citrix.com>
Signed-off-by: Raghavendra K T <raghavendra.kt@linux.vnet.ibm.com>
---
arch/x86/include/asm/spinlock.h | 35 +++++------------------------------
1 files changed, 5 insertions(+), 30 deletions(-)
diff --git a/arch/x86/include/asm/spinlock.h b/arch/x86/include/asm/spinlock.h
index 7e66b85..f6442f4 100644
--- a/arch/x86/include/asm/spinlock.h
+++ b/arch/x86/include/asm/spinlock.h
@@ -79,7 +79,7 @@ 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 };

@@ -99,7 +99,7 @@ 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;

@@ -113,7 +113,7 @@ 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;

@@ -121,46 +121,21 @@ 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 ((tmp.tail - tmp.head) & TICKET_MASK) > 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)
{


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