linux-kernel - [PATCH 13/13] x86/pvticketlock: use __ticket

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Date:	Thu,  1 Sep 2011 17:55:06 -0700
From:	Jeremy Fitzhardinge <jeremy@...p.org>
To:	"H. Peter Anvin" <hpa@...or.com>
Cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Ingo Molnar <mingo@...e.hu>,
	the arch/x86 maintainers <x86@...nel.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Nick Piggin <npiggin@...nel.dk>, Avi Kivity <avi@...hat.com>,
	Marcelo Tosatti <mtosatti@...hat.com>,
	KVM <kvm@...r.kernel.org>, Andi Kleen <andi@...stfloor.org>,
	Xen Devel <xen-devel@...ts.xensource.com>,
	Jeremy Fitzhardinge <jeremy.fitzhardinge@...rix.com>
Subject: [PATCH 13/13] x86/pvticketlock: use __ticket_t for pvop args

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

Use __ticket_t for the ticket argument to the pvops, to prevent
unnecessary zero-extension in the calling code.

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@...rix.com>
---
 arch/x86/include/asm/paravirt.h       |    6 ++++--
 arch/x86/include/asm/spinlock_types.h |    4 ----
 arch/x86/xen/spinlock.c               |    4 ++--
 3 files changed, 6 insertions(+), 8 deletions(-)

diff --git a/arch/x86/include/asm/paravirt.h b/arch/x86/include/asm/paravirt.h
index a6f2651..932a682 100644
--- a/arch/x86/include/asm/paravirt.h
+++ b/arch/x86/include/asm/paravirt.h
@@ -741,12 +741,14 @@ static inline void __set_fixmap(unsigned /* enum fixed_addresses */ idx,
 
 #if defined(CONFIG_SMP) && defined(CONFIG_PARAVIRT_SPINLOCKS)
 
-static __always_inline void __ticket_lock_spinning(struct arch_spinlock *lock, unsigned ticket)
+#include <asm/spinlock_types.h>
+
+static __always_inline void __ticket_lock_spinning(struct arch_spinlock *lock, __ticket_t ticket)
 {
 	PVOP_VCALLEE2(pv_lock_ops.lock_spinning, lock, ticket);
 }
 
-static __always_inline void __ticket_unlock_kick(struct arch_spinlock *lock, unsigned ticket)
+static __always_inline void __ticket_unlock_kick(struct arch_spinlock *lock, __ticket_t ticket)
 {
 	PVOP_VCALL2(pv_lock_ops.unlock_kick, lock, ticket);
 }
diff --git a/arch/x86/include/asm/spinlock_types.h b/arch/x86/include/asm/spinlock_types.h
index 7b383e2..62ea99e 100644
--- a/arch/x86/include/asm/spinlock_types.h
+++ b/arch/x86/include/asm/spinlock_types.h
@@ -1,10 +1,6 @@
 #ifndef _ASM_X86_SPINLOCK_TYPES_H
 #define _ASM_X86_SPINLOCK_TYPES_H
 
-#ifndef __LINUX_SPINLOCK_TYPES_H
-# error "please don't include this file directly"
-#endif
-
 #include <linux/types.h>
 
 #ifdef CONFIG_PARAVIRT_SPINLOCKS
diff --git a/arch/x86/xen/spinlock.c b/arch/x86/xen/spinlock.c
index 7b89439..91b0940 100644
--- a/arch/x86/xen/spinlock.c
+++ b/arch/x86/xen/spinlock.c
@@ -92,7 +92,7 @@ static DEFINE_PER_CPU(int, lock_kicker_irq) = -1;
 static DEFINE_PER_CPU(struct xen_lock_waiting, lock_waiting);
 static cpumask_t waiting_cpus;
 
-static void xen_lock_spinning(struct arch_spinlock *lock, unsigned want)
+static void xen_lock_spinning(struct arch_spinlock *lock, __ticket_t want)
 {
 	int irq = __this_cpu_read(lock_kicker_irq);
 	struct xen_lock_waiting *w = &__get_cpu_var(lock_waiting);
@@ -171,7 +171,7 @@ out:
 }
 PV_CALLEE_SAVE_REGS_THUNK(xen_lock_spinning);
 
-static void xen_unlock_kick(struct arch_spinlock *lock, unsigned next)
+static void xen_unlock_kick(struct arch_spinlock *lock, __ticket_t next)
 {
 	int cpu;
 
-- 
1.7.6

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