linux-kernel - [PATCH 20/20] x86/ticketlock: rename ticketpair to head

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Date:	Wed,  3 Nov 2010 11:00:01 -0400
From:	Jeremy Fitzhardinge <jeremy@...p.org>
To:	Peter Zijlstra <peterz@...radead.org>
Cc:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Nick Piggin <npiggin@...e.de>,
	Jan Beulich <JBeulich@...ell.com>, Avi Kivity <avi@...hat.com>,
	Xen-devel <xen-devel@...ts.xensource.com>,
	"H. Peter Anvin" <hpa@...or.com>,
	Linux Virtualization <virtualization@...ts.linux-foundation.org>,
	Srivatsa Vaddagiri <vatsa@...ux.vnet.ibm.com>,
	Jeremy Fitzhardinge <jeremy.fitzhardinge@...rix.com>
Subject: [PATCH 20/20] x86/ticketlock: rename ticketpair to head_tail

From: Jeremy Fitzhardinge <jeremy.fitzhardinge@...rix.com>

Make it clearer what fields head_tail is actually overlapping with.

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@...rix.com>
---
 arch/x86/include/asm/spinlock.h       |    2 +-
 arch/x86/include/asm/spinlock_types.h |    4 ++--
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/arch/x86/include/asm/spinlock.h b/arch/x86/include/asm/spinlock.h
index a16b6e4..6850884 100644
--- a/arch/x86/include/asm/spinlock.h
+++ b/arch/x86/include/asm/spinlock.h
@@ -174,7 +174,7 @@ static __always_inline int arch_spin_trylock(arch_spinlock_t *lock)
 
 	new.slock = tmp.slock + (1 << TICKET_SHIFT);
 
-	ret = cmpxchg(&lock->ticketpair, tmp.slock, new.slock) == tmp.slock;
+	ret = cmpxchg(&lock->head_tail, tmp.slock, new.slock) == tmp.slock;
 	barrier();		/* just make nothing creeps before lock is claimed */
 
 	return ret;
diff --git a/arch/x86/include/asm/spinlock_types.h b/arch/x86/include/asm/spinlock_types.h
index 307ef0b..df031ec 100644
--- a/arch/x86/include/asm/spinlock_types.h
+++ b/arch/x86/include/asm/spinlock_types.h
@@ -24,7 +24,7 @@ typedef struct arch_spinlock {
 		struct {
 			__ticket_t waiting;
 			union {
-				__ticketpair_t ticketpair;
+				__ticketpair_t head_tail;
 				struct __raw_tickets {
 					__ticket_t head, tail;
 				} tickets;
@@ -38,7 +38,7 @@ typedef struct arch_spinlock {
 #else
 typedef struct arch_spinlock {
 	union {
-		__ticketpair_t ticketpair;
+		__ticketpair_t head_tail;
 		struct __raw_tickets {
 			__ticket_t head, tail;
 		} tickets;
-- 
1.7.2.3

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