linux-kernel - [PATCH 27/74] lto: Mark EXPORT_SYMBOL symbols _

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Date:	Sat, 18 Aug 2012 19:56:23 -0700
From:	Andi Kleen <andi@...stfloor.org>
To:	linux-kernel@...r.kernel.org
Cc:	x86@...nel.org, mmarek@...e.cz, linux-kbuild@...r.kernel.org,
	JBeulich@...e.com, akpm@...ux-foundation.org,
	Andi Kleen <ak@...ux.intel.com>
Subject: [PATCH 27/74] lto: Mark EXPORT_SYMBOL symbols __visible

From: Andi Kleen <ak@...ux.intel.com>

Signed-off-by: Andi Kleen <ak@...ux.intel.com>
---
 include/linux/export.h |   14 ++++++++------
 1 files changed, 8 insertions(+), 6 deletions(-)

diff --git a/include/linux/export.h b/include/linux/export.h
index 696c0f4..784617e 100644
--- a/include/linux/export.h
+++ b/include/linux/export.h
@@ -47,7 +47,7 @@ extern struct module __this_module;
 
 /* For every exported symbol, place a struct in the __ksymtab section */
 #define __EXPORT_SYMBOL(sym, sec)				\
-	extern typeof(sym) sym;					\
+	extern typeof(sym) sym __visible;			\
 	__CRC_SYMBOL(sym, sec)					\
 	static const char __kstrtab_##sym[]			\
 	__attribute__((section("__ksymtab_strings"), aligned(1))) \
@@ -78,11 +78,13 @@ extern struct module __this_module;
 
 #else /* !CONFIG_MODULES... */
 
-#define EXPORT_SYMBOL(sym)
-#define EXPORT_SYMBOL_GPL(sym)
-#define EXPORT_SYMBOL_GPL_FUTURE(sym)
-#define EXPORT_UNUSED_SYMBOL(sym)
-#define EXPORT_UNUSED_SYMBOL_GPL(sym)
+/* Even without modules keep the __visible side effect */
+
+#define EXPORT_SYMBOL(sym) extern typeof(sym) sym __visible
+#define EXPORT_SYMBOL_GPL(sym) extern typeof(sym) sym __visible
+#define EXPORT_SYMBOL_GPL_FUTURE(sym) extern typeof(sym) sym __visible
+#define EXPORT_UNUSED_SYMBOL(sym) extern typeof(sym) sym __visible
+#define EXPORT_UNUSED_SYMBOL_GPL(sym) extern typeof(sym) sym __visible
 
 #endif /* CONFIG_MODULES */
 
-- 
1.7.7.6

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