[llvmlinux] [PATCH 2/4] x86, boot: Use __attribute__((used)) to ensure videocard structs are emitted

David Woodhouse David.Woodhouse at intel.com
Wed Jan 8 11:21:21 UTC 2014

It looks like GCC will always emit an object that is marked with an
explicit section, although the documentation doesn't say that and we
possibly shouldn't be relying on it.

Clang does *not* do so, so add __attribute__((used)) to make sure.

Signed-off-by: David Woodhouse <David.Woodhouse at intel.com>
 arch/x86/boot/video.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/boot/video.h b/arch/x86/boot/video.h
index ff339c5..0bb2549 100644
--- a/arch/x86/boot/video.h
+++ b/arch/x86/boot/video.h
@@ -80,7 +80,7 @@ struct card_info {
 	u16 xmode_n;		/* Size of unprobed mode range */
-#define __videocard struct card_info __attribute__((section(".videocards")))
+#define __videocard struct card_info __attribute__((used,section(".videocards")))
 extern struct card_info video_cards[], video_cards_end[];
 int mode_defined(u16 mode);	/* video.c */

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