| Message ID | 20230321-kexec_clang16-v7-3-b05c520b7296@chromium.org (mailing list archive) |
|---|---|
| State | Handled Elsewhere |
| Headers | show |
| Series | kexec: Fix kexec_file_load for llvm16 with PGO | expand |
Ricardo Ribalda <ribalda@chromium.org> writes: > If profile-guided optimization is enabled, the purgatory ends up with > multiple .text sections. > This is not supported by kexec and crashes the system. > > Cc: stable@vger.kernel.org > Fixes: 930457057abe ("kernel/kexec_file.c: split up __kexec_load_puragory") > Signed-off-by: Ricardo Ribalda <ribalda@chromium.org> > --- > arch/powerpc/purgatory/Makefile | 5 +++++ > 1 file changed, 5 insertions(+) Acked-by: Michael Ellerman <mpe@ellerman.id.au> (powerpc) cheers
diff --git a/arch/powerpc/purgatory/Makefile b/arch/powerpc/purgatory/Makefile index 6f5e2727963c..78473d69cd2b 100644 --- a/arch/powerpc/purgatory/Makefile +++ b/arch/powerpc/purgatory/Makefile @@ -5,6 +5,11 @@ KCSAN_SANITIZE := n targets += trampoline_$(BITS).o purgatory.ro +# When profile-guided optimization is enabled, llvm emits two different +# overlapping text sections, which is not supported by kexec. Remove profile +# optimization flags. +KBUILD_CFLAGS := $(filter-out -fprofile-sample-use=% -fprofile-use=%,$(KBUILD_CFLAGS)) + LDFLAGS_purgatory.ro := -e purgatory_start -r --no-undefined $(obj)/purgatory.ro: $(obj)/trampoline_$(BITS).o FORCE
If profile-guided optimization is enabled, the purgatory ends up with multiple .text sections. This is not supported by kexec and crashes the system. Cc: stable@vger.kernel.org Fixes: 930457057abe ("kernel/kexec_file.c: split up __kexec_load_puragory") Signed-off-by: Ricardo Ribalda <ribalda@chromium.org> --- arch/powerpc/purgatory/Makefile | 5 +++++ 1 file changed, 5 insertions(+)