On 10/31/2017 11:32 AM, Mark Salyzyn wrote:
. . .
diff --git a/arch/arm64/kernel/vdso/Makefile b/arch/arm64/kernel/vdso/Makefile
index 62c84f7cb01b..0925f8908dcb 100644
--- a/arch/arm64/kernel/vdso/Makefile
+++ b/arch/arm64/kernel/vdso/Makefile
@@ -5,18 +5,26 @@
# Heavily based on the vDSO Makefiles for other archs.
#
-obj-vdso := gettimeofday.o note.o sigreturn.o
+obj-vdso := vgettimeofday.o note.o sigreturn.o
# Build rules
targets := $(obj-vdso) vdso.so vdso.so.dbg
obj-vdso := $(addprefix $(obj)/, $(obj-vdso))
-ccflags-y := -shared -fno-common -fno-builtin
+ccflags-y := -shared -fno-common -fno-builtin -fno-stack-protector
+ccflags-y += -DDISABLE_BRANCH_PROFILING
ccflags-y += -nostdlib -Wl,-soname=linux-vdso.so.1 \
$(call cc-ldoption, -Wl$(comma)--hash-style=sysv)
+# Force -O2 to avoid libgcc dependencies
+CFLAGS_REMOVE_vgettimeofday.o = -pg -Os
+CFLAGS_vgettimeofday.o = -O2 -mcmodel=tiny
+
This last stanza breaks clang builds. Suggested fix is:
@@ -18,7 +18,11 @@ ccflags-y += -nostdlib -Wl,-soname=linux-vdso.so.1 \
# Force -O2 to avoid libgcc dependencies
CFLAGS_REMOVE_vgettimeofday.o = -pg -Os
+ifeq ($(cc-name),clang)
+CFLAGS_vgettimeofday.o = -O2
+else
CFLAGS_vgettimeofday.o = -O2 -mcmodel=tiny
+endif
# Disable gcov profiling for VDSO code
GCOV_PROFILE := n
Holding off respin or followup patch until after we get a response from
Jon Masters <[email protected]> on their QE tests on this patch series.
-- Mark
