From 960786422fe90a86e81131f5dbd902cb5ebf8760 Mon Sep 17 00:00:00 2001 From: Sean Christopherson Date: Tue, 26 Nov 2019 08:54:17 -0800 Subject: x86/ACPI/sleep: Move acpi_get_wakeup_address() into sleep.c, remove from Move the definition of acpi_get_wakeup_address() into sleep.c to break linux/acpi.h's dependency (by way of asm/acpi.h) on asm/realmode.h. Everyone and their mother includes linux/acpi.h, i.e. modifying realmode.h results in a full kernel rebuild, which makes the already inscrutable real mode boot code even more difficult to understand and is positively rage inducing when trying to make changes to x86's boot flow. No functional change intended. Signed-off-by: Sean Christopherson Link: https://lkml.kernel.org/r/20191126165417.22423-13-sean.j.christopherson@intel.com Signed-off-by: Ingo Molnar --- arch/x86/kernel/acpi/sleep.c | 11 +++++++++++ 1 file changed, 11 insertions(+) (limited to 'arch/x86/kernel/acpi/sleep.c') diff --git a/arch/x86/kernel/acpi/sleep.c b/arch/x86/kernel/acpi/sleep.c index ca13851f0570..26b7256f590f 100644 --- a/arch/x86/kernel/acpi/sleep.c +++ b/arch/x86/kernel/acpi/sleep.c @@ -26,6 +26,17 @@ unsigned long acpi_realmode_flags; static char temp_stack[4096]; #endif +/** + * acpi_get_wakeup_address - provide physical address for S3 wakeup + * + * Returns the physical address where the kernel should be resumed after the + * system awakes from S3, e.g. for programming into the firmware waking vector. + */ +unsigned long acpi_get_wakeup_address(void) +{ + return ((unsigned long)(real_mode_header->wakeup_start)); +} + /** * x86_acpi_enter_sleep_state - enter sleep state * @state: Sleep state to enter. -- cgit v1.2.3