x86: Remove unnecessary compile flag tweaks for vsyscall code
Andy Lutomirski [Wed, 10 Aug 2011 15:15:30 +0000 (11:15 -0400)]
As of commit 98d0ac38ca7b1b7a552c9a2359174ff84decb600
Author: Andy Lutomirski <luto@mit.edu>
Date:   Thu Jul 14 06:47:22 2011 -0400

    x86-64: Move vread_tsc and vread_hpet into the vDSO

user code no longer directly calls into code in arch/x86/kernel/, so
we don't need compile flag hacks to make it safe.  All vdso code is
in the vdso directory now.

Signed-off-by: Andy Lutomirski <luto@mit.edu>
Link: http://lkml.kernel.org/r/835cd05a4c7740544d09723d6ba48f4406f9826c.1312988155.git.luto@mit.edu
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>

arch/x86/kernel/Makefile
arch/x86/kernel/vsyscall_64.c

index 2deef3d..3d1ac39 100644 (file)
@@ -17,19 +17,6 @@ CFLAGS_REMOVE_ftrace.o = -pg
 CFLAGS_REMOVE_early_printk.o = -pg
 endif
 
-#
-# vsyscalls (which work on the user stack) should have
-# no stack-protector checks:
-#
-nostackp := $(call cc-option, -fno-stack-protector)
-CFLAGS_vsyscall_64.o   := $(PROFILING) -g0 $(nostackp)
-CFLAGS_hpet.o          := $(nostackp)
-CFLAGS_paravirt.o      := $(nostackp)
-GCOV_PROFILE_vsyscall_64.o     := n
-GCOV_PROFILE_hpet.o            := n
-GCOV_PROFILE_tsc.o             := n
-GCOV_PROFILE_paravirt.o                := n
-
 obj-y                  := process_$(BITS).o signal.o entry_$(BITS).o
 obj-y                  += traps.o irq.o irq_$(BITS).o dumpstack_$(BITS).o
 obj-y                  += time.o ioport.o ldt.o dumpstack.o
index 93a0d46..bf8e9ff 100644 (file)
@@ -18,9 +18,6 @@
  *  use the vDSO.
  */
 
-/* Disable profiling for userspace code: */
-#define DISABLE_BRANCH_PROFILING
-
 #include <linux/time.h>
 #include <linux/init.h>
 #include <linux/kernel.h>