| From foo@baz Thu Jan 10 19:31:24 CET 2019 |
| From: Nicholas Piggin <npiggin@gmail.com> |
| Date: Fri, 14 Sep 2018 15:08:54 +1000 |
| Subject: powerpc: avoid -mno-sched-epilog on GCC 4.9 and newer |
| |
| From: Nicholas Piggin <npiggin@gmail.com> |
| |
| commit 6977f95e63b9b3fb4a5973481a800dd9f48a1338 upstream. |
| |
| Signed-off-by: Nicholas Piggin <npiggin@gmail.com> |
| Reviewed-by: Joel Stanley <joel@jms.id.au> |
| Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> |
| Signed-off-by: Nathan Chancellor <natechancellor@gmail.com> |
| Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
| --- |
| arch/powerpc/Makefile | 8 ++++++-- |
| 1 file changed, 6 insertions(+), 2 deletions(-) |
| |
| --- a/arch/powerpc/Makefile |
| +++ b/arch/powerpc/Makefile |
| @@ -165,8 +165,12 @@ CC_FLAGS_FTRACE := -pg |
| ifdef CONFIG_MPROFILE_KERNEL |
| CC_FLAGS_FTRACE += -mprofile-kernel |
| endif |
| -# Work around a gcc code-gen bug with -fno-omit-frame-pointer. |
| -CC_FLAGS_FTRACE += -mno-sched-epilog |
| +# Work around gcc code-gen bugs with -pg / -fno-omit-frame-pointer in gcc <= 4.8 |
| +# https://gcc.gnu.org/bugzilla/show_bug.cgi?id=44199 |
| +# https://gcc.gnu.org/bugzilla/show_bug.cgi?id=52828 |
| +ifneq ($(cc-name),clang) |
| +CC_FLAGS_FTRACE += $(call cc-ifversion, -lt, 0409, -mno-sched-epilog) |
| +endif |
| endif |
| |
| CFLAGS-$(CONFIG_TARGET_CPU_BOOL) += $(call cc-option,-mcpu=$(CONFIG_TARGET_CPU)) |