From 07e83dbb75865b016f6493c119a30aac7c25051a Mon Sep 17 00:00:00 2001 From: Ard Biesheuvel Date: Wed, 17 Feb 2016 12:35:59 +0000 Subject: [PATCH] efi/efistub: Prevent __init annotations from being used __init annotations should not be used in the EFI stub, since the code is either included in the decompressor (x86, ARM) where they have no effect, or the whole stub is __init annotated at the section level (arm64), by renaming the sections. In the second case the __init annotations will be redundant, and will result in section names like .init.init.text, and our linker script does not expect that. So un-#define __init so that its inadvertent use will force a build error. Signed-off-by: Ard Biesheuvel Signed-off-by: Matt Fleming Acked-by: Mark Rutland Cc: Linus Torvalds Cc: Peter Zijlstra Cc: Thomas Gleixner Cc: linux-efi@vger.kernel.org Link: http://lkml.kernel.org/r/1455712566-16727-7-git-send-email-matt@codeblueprint.co.uk Signed-off-by: Ingo Molnar --- drivers/firmware/efi/libstub/efistub.h | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/drivers/firmware/efi/libstub/efistub.h b/drivers/firmware/efi/libstub/efistub.h index 6b6548fda089..86ff7bfa6ace 100644 --- a/drivers/firmware/efi/libstub/efistub.h +++ b/drivers/firmware/efi/libstub/efistub.h @@ -5,6 +5,16 @@ /* error code which can't be mistaken for valid address */ #define EFI_ERROR (~0UL) +/* + * __init annotations should not be used in the EFI stub, since the code is + * either included in the decompressor (x86, ARM) where they have no effect, + * or the whole stub is __init annotated at the section level (arm64), by + * renaming the sections, in which case the __init annotation will be + * redundant, and will result in section names like .init.init.text, and our + * linker script does not expect that. + */ +#undef __init + void efi_char16_printk(efi_system_table_t *, efi_char16_t *); efi_status_t efi_open_volume(efi_system_table_t *sys_table_arg, void *__image,