9b7b89efa3
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>
7 lines
308 B
Makefile
7 lines
308 B
Makefile
# __restore_processor_state() restores %gs after S3 resume and so should not
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# itself be stack-protected
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nostackp := $(call cc-option, -fno-stack-protector)
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CFLAGS_cpu_$(BITS).o := $(nostackp)
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obj-$(CONFIG_PM_SLEEP) += cpu_$(BITS).o
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obj-$(CONFIG_HIBERNATION) += hibernate_$(BITS).o hibernate_asm_$(BITS).o
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