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From:   Roger Pau Monne <roger.pau@citrix.com>
To:     <linux-kernel@vger.kernel.org>
CC:     Roger Pau Monne <roger.pau@citrix.com>,
        Boris Ostrovsky <boris.ostrovsky@oracle.com>,
        Juergen Gross <jgross@suse.com>,
        "Stefano Stabellini" <sstabellini@kernel.org>,
        <xen-devel@lists.xenproject.org>
Subject: [PATCH] xen/balloon: add header guard
Date:   Tue, 28 Jul 2020 13:42:35 +0200
Message-ID: <20200728114235.58619-1-roger.pau@citrix.com>
In-Reply-To: <20200727091342.52325-5-roger.pau@citrix.com>
References: <20200727091342.52325-5-roger.pau@citrix.com>
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In order to protect against the header being included multiple times
on the same compilation unit.

Signed-off-by: Roger Pau Monné <roger.pau@citrix.com>
---
Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Cc: Juergen Gross <jgross@suse.com>
Cc: Stefano Stabellini <sstabellini@kernel.org>
Cc: xen-devel@lists.xenproject.org
---
This is required as a pre-patch to use ZONE_DEVICE, or else the
fallback of including the balloon header might not work properly.
---
 include/xen/balloon.h | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/include/xen/balloon.h b/include/xen/balloon.h
index 6fb95aa19405..6dbdb0b3fd03 100644
--- a/include/xen/balloon.h
+++ b/include/xen/balloon.h
@@ -2,6 +2,8 @@
 /******************************************************************************
  * Xen balloon functionality
  */
+#ifndef _XEN_BALLOON_H
+#define _XEN_BALLOON_H
 
 #define RETRY_UNLIMITED	0
 
@@ -34,3 +36,5 @@ static inline void xen_balloon_init(void)
 {
 }
 #endif
+
+#endif	/* _XEN_BALLOON_H */
-- 
2.27.0