From 9f77c334f6f9bd80ae0ba0d607ac0be70fc6c771 Mon Sep 17 00:00:00 2001 From: Liang Tang Date: Wed, 28 Sep 2011 11:29:46 +0800 Subject: [PATCH] x86/acpi/sleep: Provide registration for acpi_suspend_lowlevel. Which by default will be x86_acpi_suspend_lowlevel. This registration allows us to register another callback if there is a need to use another platform specific callback. CC: Thomas Gleixner CC: "H. Peter Anvin" CC: x86@kernel.org CC: Len Brown CC: Joseph Cihula CC: Shane Wang CC: linux-pm@lists.linux-foundation.org CC: linux-acpi@vger.kernel.org CC: Len Brown Signed-off-by: Konrad Rzeszutek Wilk Signed-off-by: Liang Tang --- arch/x86/include/asm/acpi.h | 2 +- arch/x86/kernel/acpi/boot.c | 2 ++ arch/x86/kernel/acpi/sleep.c | 4 ++-- arch/x86/kernel/acpi/sleep.h | 2 ++ drivers/acpi/sleep.c | 2 ++ 5 files changed, 9 insertions(+), 3 deletions(-) diff --git a/arch/x86/include/asm/acpi.h b/arch/x86/include/asm/acpi.h index 0a46696649f06..9b538dcc57358 100644 --- a/arch/x86/include/asm/acpi.h +++ b/arch/x86/include/asm/acpi.h @@ -119,7 +119,7 @@ static inline void acpi_disable_pci(void) } /* Low-level suspend routine. */ -extern int acpi_suspend_lowlevel(void); +extern int (*acpi_suspend_lowlevel)(void); extern const unsigned char acpi_wakeup_code[]; #define acpi_wakeup_address (__pa(TRAMPOLINE_SYM(acpi_wakeup_code))) diff --git a/arch/x86/kernel/acpi/boot.c b/arch/x86/kernel/acpi/boot.c index 7f30806c1c9be..ddd081b59ca00 100644 --- a/arch/x86/kernel/acpi/boot.c +++ b/arch/x86/kernel/acpi/boot.c @@ -44,6 +44,7 @@ #include #include +#include "sleep.h" /* To include x86_acpi_suspend_lowlevel */ static int __initdata acpi_force = 0; u32 acpi_rsdt_forced; int acpi_disabled; @@ -556,6 +557,7 @@ int (*__acpi_override_sleep)(u8 sleep_state, u32 pm1a_ctrl, u32 pm1b_ctrl, bool *skip_rest) \ __attribute__ ((unused)) = NULL; +int (*acpi_suspend_lowlevel)(void) = x86_acpi_suspend_lowlevel; /* * success: return IRQ number (>=0) * failure: return < 0 diff --git a/arch/x86/kernel/acpi/sleep.c b/arch/x86/kernel/acpi/sleep.c index 103b6ab368d39..4d2d0b1190476 100644 --- a/arch/x86/kernel/acpi/sleep.c +++ b/arch/x86/kernel/acpi/sleep.c @@ -25,12 +25,12 @@ static char temp_stack[4096]; #endif /** - * acpi_suspend_lowlevel - save kernel state + * x86_acpi_suspend_lowlevel - save kernel state * * Create an identity mapped page table and copy the wakeup routine to * low memory. */ -int acpi_suspend_lowlevel(void) +int x86_acpi_suspend_lowlevel(void) { struct wakeup_header *header; /* address in low memory of the wakeup routine. */ diff --git a/arch/x86/kernel/acpi/sleep.h b/arch/x86/kernel/acpi/sleep.h index 416d4be13fef6..4d3feb5a72164 100644 --- a/arch/x86/kernel/acpi/sleep.h +++ b/arch/x86/kernel/acpi/sleep.h @@ -13,3 +13,5 @@ extern unsigned long acpi_copy_wakeup_routine(unsigned long); extern void wakeup_long64(void); extern void do_suspend_lowlevel(void); + +extern int x86_acpi_suspend_lowlevel(void); diff --git a/drivers/acpi/sleep.c b/drivers/acpi/sleep.c index 6c949602cbd11..a6da454350d6f 100644 --- a/drivers/acpi/sleep.c +++ b/drivers/acpi/sleep.c @@ -254,6 +254,8 @@ static int acpi_suspend_enter(suspend_state_t pm_state) break; case ACPI_STATE_S3: + if (!acpi_suspend_lowlevel) + return -ENODEV; error = acpi_suspend_lowlevel(); if (error) return error; -- 2.50.1