x86: Remove unnecessary compile flag tweaks for vsyscall code (f3fb5b7b) · Commits · 戴 / test

As of commit 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

+0 −13

Original line number	Diff line number	Diff line
		@@ -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

arch/x86/kernel/vsyscall_64.c

+0 −3

Original line number	Diff line number	Diff line
		@@ -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>

Admin message