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Subject[patch 08/19] UML - Fix kernel vs libc symbols clash
-stable review patch.  If anyone has any objections, please let us know.


From: Jeff Dike <>

commit 818f6ef407b448cef63294b9d0f6f8a2af9cb817 in mainline.

uml: fix an IPV6 libc vs kernel symbol clash

On some systems, with IPV6 configured, there is a clash between the kernel's
in6addr_any and the one in libc.

This is handled in the usual (gross) way of defining the kernel symbol out of
the way on the gcc command line.

Signed-off-by: Jeff Dike <>
Signed-off-by: Andrew Morton <>
Signed-off-by: Linus Torvalds <>
Signed-off-by: Greg Kroah-Hartman <>

arch/um/Makefile | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)

--- a/arch/um/Makefile
+++ b/arch/um/Makefile
@@ -60,7 +60,8 @@ SYS_DIR := $(ARCH_DIR)/include/sysdep-$

CFLAGS += $(CFLAGS-y) -D__arch_um__ -DSUBARCH=\"$(SUBARCH)\" \
$(ARCH_INCLUDE) $(MODE_INCLUDE) -Dvmap=kernel_vmap \
- -Din6addr_loopback=kernel_in6addr_loopback
+ -Din6addr_loopback=kernel_in6addr_loopback \
+ -Din6addr_any=kernel_in6addr_any


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