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| author | Joel Stanley <joel@jms.id.au> | 2018-10-31 11:39:34 +1030 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2018-10-31 20:39:25 +1100 |
| commit | 9c87156cce5a63735d1218f0096a65c50a7a32aa (patch) | |
| tree | 0b98d9ea807fbb8bfca7059c1a451eeba8c9a282 | |
| parent | a0aebae07f211c05d64be886e56d352eea86350b (diff) | |
| download | linux-9c87156cce5a63735d1218f0096a65c50a7a32aa.tar.bz2 | |
powerpc/xmon: Relax frame size for clang
When building with clang (8 trunk, 7.0 release) the frame size limit is
hit:
arch/powerpc/xmon/xmon.c:452:12: warning: stack frame size of 2576
bytes in function 'xmon_core' [-Wframe-larger-than=]
Some investigation by Naveen indicates this is due to clang saving the
addresses to printf format strings on the stack.
While this issue is investigated, bump up the frame size limit for xmon
when building with clang.
Link: https://github.com/ClangBuiltLinux/linux/issues/252
Signed-off-by: Joel Stanley <joel@jms.id.au>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
| -rw-r--r-- | arch/powerpc/xmon/Makefile | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/arch/powerpc/xmon/Makefile b/arch/powerpc/xmon/Makefile index 69e7fb47bcaa..878f9c1d3615 100644 --- a/arch/powerpc/xmon/Makefile +++ b/arch/powerpc/xmon/Makefile @@ -11,6 +11,12 @@ UBSAN_SANITIZE := n ORIG_CFLAGS := $(KBUILD_CFLAGS) KBUILD_CFLAGS = $(subst $(CC_FLAGS_FTRACE),,$(ORIG_CFLAGS)) +ifdef CONFIG_CC_IS_CLANG +# clang stores addresses on the stack causing the frame size to blow +# out. See https://github.com/ClangBuiltLinux/linux/issues/252 +KBUILD_CFLAGS += -Wframe-larger-than=4096 +endif + ccflags-$(CONFIG_PPC64) := $(NO_MINIMAL_TOC) obj-y += xmon.o nonstdio.o spr_access.o |