[Xen-devel] [PATCH RFC V10 3/18] x86/ticketlock: Collapse a layer of functions

[Raghavendra K T <raghavendra.kt@xxxxxxxxxxxxxxxxxx>]

x86/ticketlock: Collapse a layer of functions

From: Jeremy Fitzhardinge <jeremy@xxxxxxxx>

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@xxxxxxxx>
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>
Tested-by: Attilio Rao <attilio.rao@xxxxxxxxxx>
Signed-off-by: Raghavendra K T <raghavendra.kt@xxxxxxxxxxxxxxxxxx>
---
 arch/x86/include/asm/spinlock.h |   35 +++++------------------------------
 1 file changed, 5 insertions(+), 30 deletions(-)

diff --git a/arch/x86/include/asm/spinlock.h b/arch/x86/include/asm/spinlock.h
index 4d54244..7442410 100644
--- a/arch/x86/include/asm/spinlock.h
+++ b/arch/x86/include/asm/spinlock.h
@@ -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)
 {


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