linux-kernel - [PATCH linux] xen: change the type of xen_vcpu_id to uint32

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Message-Id: <1469723086-22387-1-git-send-email-vkuznets@redhat.com>
Date:	Thu, 28 Jul 2016 18:24:46 +0200
From:	Vitaly Kuznetsov <vkuznets@...hat.com>
To:	xen-devel@...ts.xenproject.org
Cc:	linux-kernel@...r.kernel.org,
	Boris Ostrovsky <boris.ostrovsky@...cle.com>,
	David Vrabel <david.vrabel@...rix.com>,
	Juergen Gross <jgross@...e.com>,
	Stefano Stabellini <sstabellini@...nel.org>,
	Julien Grall <julien.grall@....com>
Subject: [PATCH linux] xen: change the type of xen_vcpu_id to uint32_t

We pass xen_vcpu_id mapping information to hypercalls which require
uint32_t type so it would be cleaner to have it as uint32_t. The
initializer to -1 can be dropped as we always do the mapping before using
it and we never check the 'not set' value anyway.

Signed-off-by: Vitaly Kuznetsov <vkuznets@...hat.com>
---
 arch/arm/xen/enlighten.c | 2 +-
 arch/x86/xen/enlighten.c | 2 +-
 include/xen/xen-ops.h    | 2 +-
 3 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/arch/arm/xen/enlighten.c b/arch/arm/xen/enlighten.c
index 6d3a171..1752116 100644
--- a/arch/arm/xen/enlighten.c
+++ b/arch/arm/xen/enlighten.c
@@ -47,7 +47,7 @@ DEFINE_PER_CPU(struct vcpu_info *, xen_vcpu);
 static struct vcpu_info __percpu *xen_vcpu_info;
 
 /* Linux <-> Xen vCPU id mapping */
-DEFINE_PER_CPU(int, xen_vcpu_id) = -1;
+DEFINE_PER_CPU(uint32_t, xen_vcpu_id);
 EXPORT_PER_CPU_SYMBOL(xen_vcpu_id);
 
 /* These are unused until we support booting "pre-ballooned" */
diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c
index 54eef1a..78a14a0 100644
--- a/arch/x86/xen/enlighten.c
+++ b/arch/x86/xen/enlighten.c
@@ -120,7 +120,7 @@ DEFINE_PER_CPU(struct vcpu_info *, xen_vcpu);
 DEFINE_PER_CPU(struct vcpu_info, xen_vcpu_info);
 
 /* Linux <-> Xen vCPU id mapping */
-DEFINE_PER_CPU(int, xen_vcpu_id) = -1;
+DEFINE_PER_CPU(uint32_t, xen_vcpu_id);
 EXPORT_PER_CPU_SYMBOL(xen_vcpu_id);
 
 enum xen_domain_type xen_domain_type = XEN_NATIVE;
diff --git a/include/xen/xen-ops.h b/include/xen/xen-ops.h
index a4926f1..648ce814 100644
--- a/include/xen/xen-ops.h
+++ b/include/xen/xen-ops.h
@@ -9,7 +9,7 @@
 
 DECLARE_PER_CPU(struct vcpu_info *, xen_vcpu);
 
-DECLARE_PER_CPU(int, xen_vcpu_id);
+DECLARE_PER_CPU(uint32_t, xen_vcpu_id);
 static inline int xen_vcpu_nr(int cpu)
 {
 	return per_cpu(xen_vcpu_id, cpu);
-- 
2.7.4