linux-kernel - [PATCH v2 19/21] xen: create xen_create/destroy_contiguous

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Date:   Thu,  2 Mar 2017 18:53:55 +0100
From:   Vitaly Kuznetsov <vkuznets@...hat.com>
To:     xen-devel@...ts.xenproject.org
Cc:     x86@...nel.org, linux-kernel@...r.kernel.org,
        Boris Ostrovsky <boris.ostrovsky@...cle.com>,
        Juergen Gross <jgross@...e.com>,
        Andrew Jones <drjones@...hat.com>
Subject: [PATCH v2 19/21] xen: create xen_create/destroy_contiguous_region() stubs for PVHVM only builds

xen_create_contiguous_region()/xen_create_contiguous_region() are PV-only,
they both contain xen_feature(XENFEAT_auto_translated_physmap) check and
bail in the very beginning.

Signed-off-by: Vitaly Kuznetsov <vkuznets@...hat.com>
---
 include/xen/xen-ops.h | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/include/xen/xen-ops.h b/include/xen/xen-ops.h
index b5486e6..f939114 100644
--- a/include/xen/xen-ops.h
+++ b/include/xen/xen-ops.h
@@ -34,11 +34,25 @@ u64 xen_steal_clock(int cpu);
 int xen_setup_shutdown_event(void);
 
 extern unsigned long *xen_contiguous_bitmap;
+
+#ifdef CONFIG_XEN_PV
 int xen_create_contiguous_region(phys_addr_t pstart, unsigned int order,
 				unsigned int address_bits,
 				dma_addr_t *dma_handle);
 
 void xen_destroy_contiguous_region(phys_addr_t pstart, unsigned int order);
+#else
+static inline int xen_create_contiguous_region(phys_addr_t pstart,
+					       unsigned int order,
+					       unsigned int address_bits,
+					       dma_addr_t *dma_handle)
+{
+	return 0;
+}
+
+static inline void xen_destroy_contiguous_region(phys_addr_t pstart,
+						 unsigned int order) { }
+#endif
 
 struct vm_area_struct;
 
-- 
2.9.3