From 1a2c73f4834dd79e4f2c590ac75358fb44137650 Mon Sep 17 00:00:00 2001 From: Jiaxun Yang Date: Tue, 28 Feb 2023 19:34:59 +0000 Subject: MIPS: Workaround clang inline compat branch issue Clang is unable to handle the situation that a chunk of inline assembly ends with a compat branch instruction and then compiler generates another control transfer instruction immediately after this compat branch. The later instruction will end up in forbidden slot and cause exception. Workaround by add a option to control the use of compact branch. Currently it's selected by CC_IS_CLANG and hopefully we can change it to a version check in future if clang manages to fix it. Fix boot on boston board. Link: https://github.com/llvm/llvm-project/issues/61045 Signed-off-by: Jiaxun Yang Acked-by: Nathan Chancellor Acked-by: Nick Desaulniers Signed-off-by: Thomas Bogendoerfer --- arch/mips/Kconfig | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'arch/mips/Kconfig') diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig index 875c29246555..e2f3ca73f40d 100644 --- a/arch/mips/Kconfig +++ b/arch/mips/Kconfig @@ -3200,6 +3200,10 @@ config CC_HAS_MNO_BRANCH_LIKELY def_bool y depends on $(cc-option,-mno-branch-likely) +# https://github.com/llvm/llvm-project/issues/61045 +config CC_HAS_BROKEN_INLINE_COMPAT_BRANCH + def_bool y if CC_IS_CLANG + menu "Power management options" config ARCH_HIBERNATION_POSSIBLE -- cgit