linux-kernel - [PATCH V13 03/14] x86/ticketlock: Collapse a layer of functions

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Date:	Fri,  9 Aug 2013 19:51:51 +0530
From:	Raghavendra K T <raghavendra.kt@...ux.vnet.ibm.com>
To:	<mingo@...hat.com>, <hpa@...or.com>, <x86@...nel.org>,
	<jeremy@...p.org>, <konrad.wilk@...cle.com>, <gleb@...hat.com>,
	<pbonzini@...hat.com>
Cc:	<gregkh@...e.de>, <peterz@...radead.org>, <tglx@...utronix.de>,
	<agraf@...e.de>, <riel@...hat.com>, <avi.kivity@...il.com>,
	<habanero@...ux.vnet.ibm.com>, <chegu_vinod@...com>,
	<ouyang@...pitt.edu>, <drjones@...hat.com>,
	<attilio.rao@...rix.com>, linux-doc@...r.kernel.org,
	<torvalds@...ux-foundation.org>, <linux-kernel@...r.kernel.org>,
	<kvm@...r.kernel.org>, <andi@...stfloor.org>,
	<xen-devel@...ts.xensource.com>,
	<virtualization@...ts.linux-foundation.org>,
	<stefano.stabellini@...citrix.com>, <mtosatti@...hat.com>,
	<srivatsa.vaddagiri@...il.com>,
	Raghavendra K T <raghavendra.kt@...ux.vnet.ibm.com>
Subject: [PATCH V13 03/14] x86/ticketlock: Collapse a layer of functions

From: Jeremy Fitzhardinge <jeremy@...p.org>

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@...p.org>
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
Tested-by: Attilio Rao <attilio.rao@...rix.com>
Signed-off-by: Raghavendra K T <raghavendra.kt@...ux.vnet.ibm.com>
Acked-by: Ingo Molnar <mingo@...nel.org>
---
 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)
 {
-- 
1.7.11.7

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