6.16-stable review patch. If anyone has any objections, please let me know.
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From: Huacai Chen chenhuacai@loongson.cn
commit a9d13433fe17be0e867e51e71a1acd2731fbef8d upstream.
ARCH_STRICT_ALIGN is used for hardware without UAL, now it only control the -mstrict-align flag. However, ACPI structures are packed by default so will cause unaligned accesses.
To avoid this, define ACPI_MISALIGNMENT_NOT_SUPPORTED in asm/acenv.h to align ACPI structures if ARCH_STRICT_ALIGN enabled.
Cc: stable@vger.kernel.org Reported-by: Binbin Zhou zhoubinbin@loongson.cn Suggested-by: Xi Ruoyao xry111@xry111.site Suggested-by: Jiaxun Yang jiaxun.yang@flygoat.com Signed-off-by: Huacai Chen chenhuacai@loongson.cn Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- arch/loongarch/include/asm/acenv.h | 7 +++---- 1 file changed, 3 insertions(+), 4 deletions(-)
--- a/arch/loongarch/include/asm/acenv.h +++ b/arch/loongarch/include/asm/acenv.h @@ -10,9 +10,8 @@ #ifndef _ASM_LOONGARCH_ACENV_H #define _ASM_LOONGARCH_ACENV_H
-/* - * This header is required by ACPI core, but we have nothing to fill in - * right now. Will be updated later when needed. - */ +#ifdef CONFIG_ARCH_STRICT_ALIGN +#define ACPI_MISALIGNMENT_NOT_SUPPORTED +#endif /* CONFIG_ARCH_STRICT_ALIGN */
#endif /* _ASM_LOONGARCH_ACENV_H */