[U-Boot] [PATCH v13 6/6] add weak entry definition

[fenghua at phytium.com.cn]

From: David Feng <fenghua at phytium.com.cn>

Signed-off-by: David Feng <fenghua at phytium.com.cn>
---
 include/linux/linkage.h |    4 ++++
 1 file changed, 4 insertions(+)

diff --git a/include/linux/linkage.h b/include/linux/linkage.h
index 9ddf830..2a2848a 100644
--- a/include/linux/linkage.h
+++ b/include/linux/linkage.h
@@ -49,6 +49,10 @@
 	.globl SYMBOL_NAME(name); \
 	LENTRY(name)
 
+#define WEAK(name) \
+	.weak SYMBOL_NAME(name); \
+	LENTRY(name)
+
 #ifndef END
 #define END(name) \
 	.size name, .-name
-- 
1.7.9.5