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x86: Remove unnecessary compile flag tweaks for vsyscall code 

As of commit 98d0ac38ca
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>
hifive-unleashed-5.1
Andy Lutomirski 2011-08-10 11:15:30 -04:00 committed by H. Peter Anvin
parent c149a665ac
commit f3fb5b7bb7
2 changed files with 0 additions and 16 deletions
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13
arch/x86/kernel/Makefile
View 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

3
arch/x86/kernel/vsyscall_64.c
View 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>