linux/arch/x86/power/Makefile

# __restore_processor_state() restores %gs after S3 resume and so should not
# itself be stack-protected
nostackp := $(call cc-option, -fno-stack-protector)
CFLAGS_cpu_$(BITS).o	:= $(nostackp)

obj-$(CONFIG_PM_SLEEP)		+= cpu.o
obj-$(CONFIG_HIBERNATION)	+= hibernate_$(BITS).o hibernate_asm_$(BITS).o
x86: disable stack-protector for __restore_processor_state() The __restore_processor_state() fn restores %gs on resume from S3. As such, it cannot be protected by the stack-protector guard since %gs will not be correct on function entry. There are only a few other fns in this file and it should not negatively impact kernel security that they will also have the stack-protector guard removed (and so it's not worth moving them to another file). Without this change, S3 resume on a kernel built with CONFIG_CC_STACKPROTECTOR_ALL=y will fail. Signed-off-by: Joseph Cihula <joseph.cihula@intel.com> Tested-by: Chris Wright <chrisw@sous-sol.org> Cc: Arjan van de Ven <arjan@linux.intel.com> Cc: Tejun Heo <tj@kernel.org> LKML-Reference: <49D13385.5060900@intel.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> 2009-03-30 21:03:01 +00:00			`# __restore_processor_state() restores %gs after S3 resume and so should not`
			`# itself be stack-protected`
			`nostackp := $(call cc-option, -fno-stack-protector)`
			`CFLAGS_cpu_$(BITS).o := $(nostackp)`

x86: unify power/cpu_(32\|64).c This is the last unification step. Here we do remove one of the files and rename the left one as cpu.c, as both are now the same. Also update power/Makefile, telling it to build cpu.o, instead of cpu_(32\|64).o Signed-off-by: Sergio Luis <sergio@larces.uece.br> Signed-off-by: Lauro Salmito <laurosalmito@gmail.com> Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> 2009-04-27 22:27:22 +00:00			`obj-$(CONFIG_PM_SLEEP) += cpu.o`
x86 PM: consolidate suspend and hibernation code Move the hibernation-specific code from arch/x86/power/suspend_64.c to a separate file (hibernate_64.c) and the CPU-handling code to cpu_64.c (in line with the corresponding 32-bit code). Simplify arch/x86/power/Makefile . Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Acked-by: Pavel Machek <pavel@ucw.cz> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> 2008-02-09 22:24:09 +00:00			`obj-$(CONFIG_HIBERNATION) += hibernate_$(BITS).o hibernate_asm_$(BITS).o`