[PATCH 5.15 23/89] x86/realmode: build with -D__DISABLE_EXPORTS

Greg Kroah-Hartman
2022-07-22T09:21:40Z

From: Thadeu Lima de Souza Cascardo <cascardo@canonical.com>

Commit 156ff4a544ae ("x86/ibt: Base IBT bits") added this option when
building realmode in order to disable IBT there. This is also needed in
order to disable return thunks.

Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo@canonical.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
arch/x86/Makefile | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

--- a/arch/x86/Makefile
+++ b/arch/x86/Makefile
@@ -24,7 +24,7 @@ endif

# How to compile the 16-bit code. Note we always compile for -march=i386;
# that way we can complain to the user if the CPU is insufficient.
-REALMODE_CFLAGS := -m16 -g -Os -DDISABLE_BRANCH_PROFILING \
+REALMODE_CFLAGS := -m16 -g -Os -DDISABLE_BRANCH_PROFILING -D__DISABLE_EXPORTS \
-Wall -Wstrict-prototypes -march=i386 -mregparm=3 \
-fno-strict-aliasing -fomit-frame-pointer -fno-pic \
-mno-mmx -mno-sse $(call cc-option,-fcf-protection=none)