linux-kernel - [PATCH v4 75/79] include/uapi/xen/privcmd.h: fix compilation in userspace

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Message-Id: <1444888618-4506-76-git-send-email-mikko.rapeli@iki.fi>
Date:	Thu, 15 Oct 2015 07:56:53 +0200
From:	Mikko Rapeli <mikko.rapeli@....fi>
To:	linux-kernel@...r.kernel.org
Cc:	mikko.rapeli@....fi,
	Stefano Stabellini <stefano.stabellini@...citrix.com>,
	Russell King <linux@....linux.org.uk>,
	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
	Boris Ostrovsky <boris.ostrovsky@...cle.com>,
	David Vrabel <david.vrabel@...rix.com>,
	xen-devel@...ts.xenproject.org,
	linux-arm-kernel@...ts.infradead.org, linux-api@...r.kernel.org
Subject: [PATCH v4 75/79] include/uapi/xen/privcmd.h: fix compilation in userspace

xen/interface/xen.h is not exported from kernel headers so remove the
dependency and provide needed defines for domid_t and xen_pfn_t if they
are not already defined by some other e.g. Xen specific headers.

Suggested by Andrew Cooper <andrew.cooper3@...rix.com> on lkml message
<5569F9C9.8000607@...rix.com>.

The ifdef for ARM is ugly but did not find better solutions for it.

Fixes userspace compilation error:

xen/privcmd.h:38:31: fatal error: xen/interface/xen.h: No such file or directory

Signed-off-by: Mikko Rapeli <mikko.rapeli@....fi>
---
 arch/arm/include/asm/xen/interface.h |  2 +-
 include/uapi/xen/privcmd.h           | 14 +++++++++++++-
 2 files changed, 14 insertions(+), 2 deletions(-)

diff --git a/arch/arm/include/asm/xen/interface.h b/arch/arm/include/asm/xen/interface.h
index 5006600..68a9d99 100644
--- a/arch/arm/include/asm/xen/interface.h
+++ b/arch/arm/include/asm/xen/interface.h
@@ -36,7 +36,7 @@
  * fine since it simply wouldn't be able to create any sure pfns in
  * the first place.
  */
-typedef uint64_t xen_pfn_t;
+typedef __u64 xen_pfn_t;
 #define PRI_xen_pfn "llx"
 typedef uint64_t xen_ulong_t;
 #define PRI_xen_ulong "llx"
diff --git a/include/uapi/xen/privcmd.h b/include/uapi/xen/privcmd.h
index 7ddeeda..95b73a9 100644
--- a/include/uapi/xen/privcmd.h
+++ b/include/uapi/xen/privcmd.h
@@ -35,7 +35,19 @@
 
 #include <linux/types.h>
 #include <linux/compiler.h>
-#include <xen/interface/xen.h>
+
+/* Might be defined by Xen specific headers, but if not */
+#ifndef domid_t
+typedef __u16 domid_t;
+#endif /* domid_t */
+
+#ifndef xen_pfn_t
+#if (defined __ARMEL__ || defined __ARMEB__)
+typedef __u64 xen_pfn_t;
+#else
+typedef unsigned long xen_pfn_t;
+#endif /* (defined __ARMEL__ || defined __ARMEB__) */
+#endif /* xen_pfn_t */
 
 struct privcmd_hypercall {
 	__u64 op;
-- 
2.5.0

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