From: Stefan Seyfried <[email protected]>
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.
Signed-off-by: Stefan Seyfried <[email protected]>
---
Patch is against 2.6.18. AFAIK little has changed in this area recently, so
it should still apply. I have two machines that are pretty broken without it,
so it is rather urgent for me :-)
Please apply.
diff -rup a/kernel/power/power.h b/kernel/power/power.h
--- a/kernel/power/power.h 2006-09-20 05:42:06.000000000 +0200
+++ b/kernel/power/power.h 2006-09-25 08:42:46.000000000 +0200
@@ -78,7 +78,12 @@ int snapshot_image_loaded(struct snapsho
#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 -rup a/kernel/power/user.c b/kernel/power/user.c
--- a/kernel/power/user.c 2006-09-20 05:42:06.000000000 +0200
+++ b/kernel/power/user.c 2006-09-12 18:45:34.000000000 +0200
@@ -11,6 +11,7 @@
#include <linux/suspend.h>
#include <linux/syscalls.h>
+#include <linux/reboot.h>
#include <linux/string.h>
#include <linux/device.h>
#include <linux/miscdevice.h>
@@ -302,6 +303,33 @@ 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;
--
Stefan Seyfried
QA / R&D Team Mobile Devices | "Any ideas, John?"
SUSE LINUX Products GmbH, Nürnberg | "Well, surrounding them's out."
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[Index of Archives]
[Kernel Newbies]
[Netfilter]
[Bugtraq]
[Photo]
[Stuff]
[Gimp]
[Yosemite News]
[MIPS Linux]
[ARM Linux]
[Linux Security]
[Linux RAID]
[Video 4 Linux]
[Linux for the blind]
[Linux Resources]
