Pull bugzilla-5653 into release branch

[linux-2.6-omap-h63xx.git] / kernel / power / disk.c

diff --git a/kernel/power/disk.c b/kernel/power/disk.c
index 027322a564f48ac2c79c08ab9240a5db7b42751f..81d4d982f3f097f55f02f427381f8871cac6f8cf 100644 (file)
--- a/kernel/power/disk.c
+++ b/kernel/power/disk.c
@@ -22,16 +22,6 @@
 #include "power.h"
 
 
-extern suspend_disk_method_t pm_disk_mode;
-
-extern int swsusp_suspend(void);
-extern int swsusp_write(void);
-extern int swsusp_check(void);
-extern int swsusp_read(void);
-extern void swsusp_close(void);
-extern int swsusp_resume(void);
-
-
 static int noresume = 0;
 char resume_file[256] = CONFIG_PM_STD_PARTITION;
 dev_t swsusp_resume_device;
@@ -52,7 +42,7 @@ static void power_down(suspend_disk_method_t mode)
 
        switch(mode) {
        case PM_DISK_PLATFORM:
-               kernel_power_off_prepare();
+               kernel_shutdown_prepare(SYSTEM_SUSPEND_DISK);
                error = pm_ops->enter(PM_SUSPEND_DISK);
                break;
        case PM_DISK_SHUTDOWN:
@@ -69,35 +59,6 @@ static void power_down(suspend_disk_method_t mode)
        while(1);
 }
 
-
-static int in_suspend __nosavedata = 0;
-
-
-/**
- *     free_some_memory -  Try to free as much memory as possible
- *
- *     ... but do not OOM-kill anyone
- *
- *     Notice: all userland should be stopped at this point, or
- *     livelock is possible.
- */
-
-static void free_some_memory(void)
-{
-       unsigned int i = 0;
-       unsigned int tmp;
-       unsigned long pages = 0;
-       char *p = "-\\|/";
-
-       printk("Freeing memory...  ");
-       while ((tmp = shrink_all_memory(10000))) {
-               pages += tmp;
-               printk("\b%c", p[i++ % 4]);
-       }
-       printk("\bdone (%li pages freed)\n", pages);
-}
-
-
 static inline void platform_finish(void)
 {
        if (pm_disk_mode == PM_DISK_PLATFORM) {
@@ -111,7 +72,6 @@ static int prepare_processes(void)
        int error;
 
        pm_prepare_console();
-       sys_sync();
        disable_nonboot_cpus();
 
        if (freeze_processes()) {
@@ -119,16 +79,9 @@ static int prepare_processes(void)
                goto thaw;
        }
 
-       if (pm_disk_mode == PM_DISK_PLATFORM) {
-               if (pm_ops && pm_ops->prepare) {
-                       if ((error = pm_ops->prepare(PM_SUSPEND_DISK)))
-                               goto thaw;
-               }
-       }
-
        /* Free memory before shutting down devices. */
-       free_some_memory();
-       return 0;
+       if (!(error = swsusp_shrink_memory()))
+               return 0;
 thaw:
        thaw_processes();
        enable_nonboot_cpus();
@@ -363,37 +316,55 @@ static ssize_t resume_show(struct subsystem * subsys, char *buf)
                       MINOR(swsusp_resume_device));
 }
 
-static ssize_t resume_store(struct subsystem * subsys, const char * buf, size_t n)
+static ssize_t resume_store(struct subsystem *subsys, const char *buf, size_t n)
 {
-       int len;
-       char *p;
        unsigned int maj, min;
-       int error = -EINVAL;
        dev_t res;
+       int ret = -EINVAL;
 
-       p = memchr(buf, '\n', n);
-       len = p ? p - buf : n;
+       if (sscanf(buf, "%u:%u", &maj, &min) != 2)
+               goto out;
 
-       if (sscanf(buf, "%u:%u", &maj, &min) == 2) {
-               res = MKDEV(maj,min);
-               if (maj == MAJOR(res) && min == MINOR(res)) {
-                       down(&pm_sem);
-                       swsusp_resume_device = res;
-                       up(&pm_sem);
-                       printk("Attempting manual resume\n");
-                       noresume = 0;
-                       software_resume();
-               }
-       }
+       res = MKDEV(maj,min);
+       if (maj != MAJOR(res) || min != MINOR(res))
+               goto out;
 
-       return error >= 0 ? n : error;
+       down(&pm_sem);
+       swsusp_resume_device = res;
+       up(&pm_sem);
+       printk("Attempting manual resume\n");
+       noresume = 0;
+       software_resume();
+       ret = n;
+out:
+       return ret;
 }
 
 power_attr(resume);
 
+static ssize_t image_size_show(struct subsystem * subsys, char *buf)
+{
+       return sprintf(buf, "%lu\n", image_size);
+}
+
+static ssize_t image_size_store(struct subsystem * subsys, const char * buf, size_t n)
+{
+       unsigned long size;
+
+       if (sscanf(buf, "%lu", &size) == 1) {
+               image_size = size;
+               return n;
+       }
+
+       return -EINVAL;
+}
+
+power_attr(image_size);
+
 static struct attribute * g[] = {
        &disk_attr.attr,
        &resume_attr.attr,
+       &image_size_attr.attr,
        NULL,
 };