diff options
author | Andy Lutomirski <luto@MIT.EDU> | 2011-05-23 09:31:29 -0400 |
---|---|---|
committer | Thomas Gleixner <tglx@linutronix.de> | 2011-05-24 08:51:29 -0400 |
commit | 6447facba36e3fff77ab4c68f46297a5dab024c8 (patch) | |
tree | 39a373cd6e3442dd7b771e8662c3f073e7b53065 /arch/x86/vdso/Makefile | |
parent | 44259b1abfaa8bb819d25d41d71e8e33e25dd36a (diff) |
x86-64: Turn off -pg and turn on -foptimize-sibling-calls for vDSO
The vDSO isn't part of the kernel, so profiling and kernel
backtraces don't really matter.
Signed-off-by: Andy Lutomirski <luto@mit.edu>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Eric Dumazet <eric.dumazet@gmail.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Borislav Petkov <bp@amd64.org>
Link: http://lkml.kernel.org/r/%3C23087b738c037342abb53f2f07b9bef89ceaeea3.1306156808.git.luto%40mit.edu%3E
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'arch/x86/vdso/Makefile')
-rw-r--r-- | arch/x86/vdso/Makefile | 15 |
1 files changed, 14 insertions, 1 deletions
diff --git a/arch/x86/vdso/Makefile b/arch/x86/vdso/Makefile index a651861f7e8e..bef0bc962400 100644 --- a/arch/x86/vdso/Makefile +++ b/arch/x86/vdso/Makefile | |||
@@ -37,11 +37,24 @@ $(obj)/%.so: OBJCOPYFLAGS := -S | |||
37 | $(obj)/%.so: $(obj)/%.so.dbg FORCE | 37 | $(obj)/%.so: $(obj)/%.so.dbg FORCE |
38 | $(call if_changed,objcopy) | 38 | $(call if_changed,objcopy) |
39 | 39 | ||
40 | # | ||
41 | # Don't omit frame pointers for ease of userspace debugging, but do | ||
42 | # optimize sibling calls. | ||
43 | # | ||
40 | CFL := $(PROFILING) -mcmodel=small -fPIC -O2 -fasynchronous-unwind-tables -m64 \ | 44 | CFL := $(PROFILING) -mcmodel=small -fPIC -O2 -fasynchronous-unwind-tables -m64 \ |
41 | $(filter -g%,$(KBUILD_CFLAGS)) $(call cc-option, -fno-stack-protector) | 45 | $(filter -g%,$(KBUILD_CFLAGS)) $(call cc-option, -fno-stack-protector) \ |
46 | -fno-omit-frame-pointer -foptimize-sibling-calls | ||
42 | 47 | ||
43 | $(vobjs): KBUILD_CFLAGS += $(CFL) | 48 | $(vobjs): KBUILD_CFLAGS += $(CFL) |
44 | 49 | ||
50 | # | ||
51 | # vDSO code runs in userspace and -pg doesn't help with profiling anyway. | ||
52 | # | ||
53 | CFLAGS_REMOVE_vdso-note.o = -pg | ||
54 | CFLAGS_REMOVE_vclock_gettime.o = -pg | ||
55 | CFLAGS_REMOVE_vgetcpu.o = -pg | ||
56 | CFLAGS_REMOVE_vvar.o = -pg | ||
57 | |||
45 | targets += vdso-syms.lds | 58 | targets += vdso-syms.lds |
46 | obj-$(VDSO64-y) += vdso-syms.lds | 59 | obj-$(VDSO64-y) += vdso-syms.lds |
47 | 60 | ||