Merge branch 'pm-sleep' into pm-for-linus (c233523b) · Commits · e / devices / android_kernel_teracube_2e

kernel/power/user.c

+64 −0

Original line number	Diff line number	Diff line
		@@ -21,6 +21,7 @@
		#include <linux/swapops.h>
		#include <linux/pm.h>
		#include <linux/fs.h>
		#include <linux/compat.h>
		#include <linux/console.h>
		#include <linux/cpu.h>
		#include <linux/freezer.h>
		@@ -380,6 +381,66 @@ static long snapshot_ioctl(struct file *filp, unsigned int cmd,
		return error;
		}

		#ifdef CONFIG_COMPAT

		struct compat_resume_swap_area {
		compat_loff_t offset;
		u32 dev;
		} __packed;

		static long
		snapshot_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
		{
		BUILD_BUG_ON(sizeof(loff_t) != sizeof(compat_loff_t));

		switch (cmd) {
		case SNAPSHOT_GET_IMAGE_SIZE:
		case SNAPSHOT_AVAIL_SWAP_SIZE:
		case SNAPSHOT_ALLOC_SWAP_PAGE: {
		compat_loff_t __user *uoffset = compat_ptr(arg);
		loff_t offset;
		mm_segment_t old_fs;
		int err;

		old_fs = get_fs();
		set_fs(KERNEL_DS);
		err = snapshot_ioctl(file, cmd, (unsigned long) &offset);
		set_fs(old_fs);
		if (!err && put_user(offset, uoffset))
		err = -EFAULT;
		return err;
		}

		case SNAPSHOT_CREATE_IMAGE:
		return snapshot_ioctl(file, cmd,
		(unsigned long) compat_ptr(arg));

		case SNAPSHOT_SET_SWAP_AREA: {
		struct compat_resume_swap_area __user *u_swap_area =
		compat_ptr(arg);
		struct resume_swap_area swap_area;
		mm_segment_t old_fs;
		int err;

		err = get_user(swap_area.offset, &u_swap_area->offset);
		err \|= get_user(swap_area.dev, &u_swap_area->dev);
		if (err)
		return -EFAULT;
		old_fs = get_fs();
		set_fs(KERNEL_DS);
		err = snapshot_ioctl(file, SNAPSHOT_SET_SWAP_AREA,
		(unsigned long) &swap_area);
		set_fs(old_fs);
		return err;
		}

		default:
		return snapshot_ioctl(file, cmd, arg);
		}
		}

		#endif /* CONFIG_COMPAT */

		static const struct file_operations snapshot_fops = {
		.open = snapshot_open,
		.release = snapshot_release,
		@@ -387,6 +448,9 @@ static const struct file_operations snapshot_fops = {
		.write = snapshot_write,
		.llseek = no_llseek,
		.unlocked_ioctl = snapshot_ioctl,
		#ifdef CONFIG_COMPAT
		.compat_ioctl = snapshot_compat_ioctl,
		#endif
		};

		static struct miscdevice snapshot_device = {