Messages in this thread Patch in this message | | | From | Arnd Bergmann <> | Subject | [PATCH] arm64: disable patchable function entry on big-endian clang builds | Date | Tue, 5 May 2020 16:12:36 +0200 |
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Clang only supports the patchable_function_entry attribute on little-endian arm64 builds, but not on big-endian:
include/linux/kasan-checks.h:16:8: error: unknown attribute 'patchable_function_entry' ignored [-Werror,-Wunknown-attributes]
Disable that configuration with another dependency. Unfortunately the existing check is not enough, as $(cc-option) at this point does not pass the -mbig-endian flag.
Fixes: 3b23e4991fb6 ("arm64: implement ftrace with regs") Signed-off-by: Arnd Bergmann <arnd@arndb.de> --- arch/arm64/Kconfig | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig index 4b256fa6db7a..a33d6402b934 100644 --- a/arch/arm64/Kconfig +++ b/arch/arm64/Kconfig @@ -151,7 +151,7 @@ config ARM64 select HAVE_DMA_CONTIGUOUS select HAVE_DYNAMIC_FTRACE select HAVE_DYNAMIC_FTRACE_WITH_REGS \ - if $(cc-option,-fpatchable-function-entry=2) + if $(cc-option,-fpatchable-function-entry=2) && !(CC_IS_CLANG && CPU_BIG_ENDIAN) select HAVE_EFFICIENT_UNALIGNED_ACCESS select HAVE_FAST_GUP select HAVE_FTRACE_MCOUNT_RECORD -- 2.26.0
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