Commit-ID: 760b61d76da6d6a99eb245ab61abf71ca5415cea
Gitweb: http://git.kernel.org/tip/760b61d76da6d6a99eb245ab61abf71ca5415cea
Author: Ard Biesheuvel <ard.biesheuvel@xxxxxxxxxx>
AuthorDate: Fri, 18 Aug 2017 20:49:35 +0100
Committer: Ingo Molnar <mingo@xxxxxxxxxx>
CommitDate: Mon, 21 Aug 2017 09:43:49 +0200
efi/libstub/arm64: Use hidden attribute for struct screen_info reference
To prevent the compiler from emitting absolute references to screen_info
when building position independent code, redeclare the symbol with hidden
visibility.
Tested-by: Matthias Kaehlcke <mka@xxxxxxxxxxxx>
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@xxxxxxxxxx>
Cc: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Cc: Matt Fleming <matt@xxxxxxxxxxxxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: linux-efi@xxxxxxxxxxxxxxx
Link: http://lkml.kernel.org/r/20170818194947.19347-3-ard.biesheuvel@xxxxxxxxxx
Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx>
---
arch/arm64/include/asm/efi.h | 3 +++
1 file changed, 3 insertions(+)
diff --git a/arch/arm64/include/asm/efi.h b/arch/arm64/include/asm/efi.h
index 8f3043a..464ac85 100644
--- a/arch/arm64/include/asm/efi.h
+++ b/arch/arm64/include/asm/efi.h
@@ -81,6 +81,9 @@ static inline unsigned long efi_get_max_initrd_addr(unsigned long dram_base,
#define alloc_screen_info(x...) &screen_info
#define free_screen_info(x...)
+/* redeclare as 'hidden' so the compiler will generate relative references */
+extern struct screen_info screen_info __attribute__((__visibility__("hidden")));
+
static inline void efifb_setup_from_dmi(struct screen_info *si, const char *opt)
{
}
--
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