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authorDave Martin <Dave.Martin@arm.com>2019-06-06 11:33:43 +0100
committerWill Deacon <will.deacon@arm.com>2019-06-06 13:28:45 +0100
commitebcc5928c5d925b1c8d968d9c89cdb0d0186db17 (patch)
parentARM64: trivial: s/TIF_SECOMP/TIF_SECCOMP/ comment typo fix (diff)
arm64: Silence gcc warnings about arch ABI drift
Since GCC 9, the compiler warns about evolution of the platform-specific ABI, in particular relating for the marshaling of certain structures involving bitfields. The kernel is a standalone binary, and of course nobody would be so stupid as to expose structs containing bitfields as function arguments in ABI. (Passing a pointer to such a struct, however inadvisable, should be unaffected by this change. perf and various drivers rely on that.) So these warnings do more harm than good: turn them off. We may miss warnings about future ABI drift, but that's too bad. Future ABI breaks of this class will have to be debugged and fixed the traditional way unless the compiler evolves finer-grained diagnostics. Signed-off-by: Dave Martin <Dave.Martin@arm.com> Signed-off-by: Will Deacon <will.deacon@arm.com>
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/arm64/Makefile b/arch/arm64/Makefile
index b025304bde46..8fbd583b18e1 100644
--- a/arch/arm64/Makefile
+++ b/arch/arm64/Makefile
@@ -51,6 +51,7 @@ endif
KBUILD_CFLAGS += -mgeneral-regs-only $(lseinstr) $(brokengasinst)
KBUILD_CFLAGS += -fno-asynchronous-unwind-tables
+KBUILD_CFLAGS += -Wno-psabi
KBUILD_AFLAGS += $(lseinstr) $(brokengasinst)
KBUILD_CFLAGS += $(call cc-option,-mabi=lp64)