[PATCH 1/3] uml: use -mcmodel=kernel for x86_64

[Paolo 'Blaisorblade' Giarrusso]

From: Paolo 'Blaisorblade' Giarrusso <blaisorblade@xxxxxxxx>

We have never used this flag and recently one user experienced a complaining
warning about this (there was a symbol in the positive half of the address space
IIRC). So fix it.

Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@xxxxxxxx>
---

 arch/um/Makefile-x86_64 |    7 +++++--
 1 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/arch/um/Makefile-x86_64 b/arch/um/Makefile-x86_64
index 9558a7c..11154b6 100644
--- a/arch/um/Makefile-x86_64
+++ b/arch/um/Makefile-x86_64
@@ -4,10 +4,13 @@ # Released under the GPL
 core-y += arch/um/sys-x86_64/
 START := 0x60000000
 
+_extra_flags_ = -fno-builtin -m64 -mcmodel=kernel
+
 #We #undef __x86_64__ for kernelspace, not for userspace where
 #it's needed for headers to work!
-CFLAGS += -U__$(SUBARCH)__ -fno-builtin -m64
-USER_CFLAGS += -fno-builtin -m64
+CFLAGS += -U__$(SUBARCH)__ $(_extra_flags_)
+USER_CFLAGS += $(_extra_flags_)
+
 CHECKFLAGS  += -m64
 AFLAGS += -m64
 LDFLAGS += -m elf_x86_64
-
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