From 3592695c363c3f3119621bdcf5ed852d6b9d1a5c Mon Sep 17 00:00:00 2001 From: Stefan Seyfried Date: Wed, 6 Dec 2006 20:34:06 -0800 Subject: [PATCH] uswsusp: add pmops->{prepare,enter,finish} support (aka "platform mode") Add an ioctl to the userspace swsusp code that enables the usage of the pmops->prepare, pmops->enter and pmops->finish methods (the in-kernel suspend knows these as "platform method"). These are needed on many machines to (among others) speed up resuming by letting the BIOS skip some steps or let my hp nx5000 recognise the correct ac_adapter state after resume again. It also ensures on many machines, that changed hardware (unplugged AC adapters) gets correctly detected and that kacpid does not run wild after resume. Signed-off-by: Stefan Seyfried Cc: "Rafael J. Wysocki" Cc: Pavel Machek Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- kernel/power/power.h | 7 ++++++- kernel/power/user.c | 28 ++++++++++++++++++++++++++++ 2 files changed, 34 insertions(+), 1 deletion(-) diff --git a/kernel/power/power.h b/kernel/power/power.h index bfe999f7b272..87ecb1856ee8 100644 --- a/kernel/power/power.h +++ b/kernel/power/power.h @@ -117,7 +117,12 @@ extern void snapshot_free_unused_memory(struct snapshot_handle *handle); #define SNAPSHOT_FREE_SWAP_PAGES _IO(SNAPSHOT_IOC_MAGIC, 9) #define SNAPSHOT_SET_SWAP_FILE _IOW(SNAPSHOT_IOC_MAGIC, 10, unsigned int) #define SNAPSHOT_S2RAM _IO(SNAPSHOT_IOC_MAGIC, 11) -#define SNAPSHOT_IOC_MAXNR 11 +#define SNAPSHOT_PMOPS _IOW(SNAPSHOT_IOC_MAGIC, 12, unsigned int) +#define SNAPSHOT_IOC_MAXNR 12 + +#define PMOPS_PREPARE 1 +#define PMOPS_ENTER 2 +#define PMOPS_FINISH 3 /** * The bitmap is used for tracing allocated swap pages diff --git a/kernel/power/user.c b/kernel/power/user.c index d991d3b0e5a4..4c24ca5d62e3 100644 --- a/kernel/power/user.c +++ b/kernel/power/user.c @@ -11,6 +11,7 @@ #include #include +#include #include #include #include @@ -313,6 +314,33 @@ OutS3: up(&pm_sem); break; + case SNAPSHOT_PMOPS: + switch (arg) { + + case PMOPS_PREPARE: + if (pm_ops->prepare) { + error = pm_ops->prepare(PM_SUSPEND_DISK); + } + break; + + case PMOPS_ENTER: + kernel_shutdown_prepare(SYSTEM_SUSPEND_DISK); + error = pm_ops->enter(PM_SUSPEND_DISK); + break; + + case PMOPS_FINISH: + if (pm_ops && pm_ops->finish) { + pm_ops->finish(PM_SUSPEND_DISK); + } + break; + + default: + printk(KERN_ERR "SNAPSHOT_PMOPS: invalid argument %ld\n", arg); + error = -EINVAL; + + } + break; + default: error = -ENOTTY; -- cgit v1.2.1