linux-kernel - [PATCH] Re: tools/liblockdep: Build failure

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Date:	Tue, 1 Apr 2014 12:21:59 +0200
From:	Robin Hack <rhack@...hat.com>
To:	Eunbong Song <eunb.song@...sung.com>
Cc:	ak@...ux.intel.com, sasha.levin@...cle.com,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: [PATCH] Re: tools/liblockdep: Build failure

From: Robin Hack <rhack@...hat.com>
Copy asmlinkage macro to lockdep/uinclude/linux/linkage.h.

diff --git a/tools/lib/lockdep/uinclude/linux/linkage.h b/tools/lib/lockdep/uinclude/linux/linkage.h
index fab00ff..6799a5b 100644
--- a/tools/lib/lockdep/uinclude/linux/linkage.h
+++ b/tools/lib/lockdep/uinclude/linux/linkage.h
@@ -1,3 +1,19 @@
+#ifndef _LOCKDEP_ULINKAGE_H
+#define _LOCKDEP_ULINKAGE_H
 
-/* empty file */
+#if GCC_VERSION >= 40600
+/*
+ * Tell the optimizer that something else uses this function or variable.
+ */
+#define __visible __attribute__((externally_visible))
+#else
+#define __visible
+#endif
 
+#define CPP_ASMLINKAGE __visible
+
+#ifndef asmlinkage
+#define asmlinkage CPP_ASMLINKAGE
+#endif
+
+#endif

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