Re: suspend2 merge (was Re: [Suspend2-devel] Re: CFS and suspend2: hang in atomic copy)

Pavel Machek
2007-04-26T11:17:12Z

Hi!

> > Does this seem to help?
>
> No idea, I haven't actually tried it yet, last time I tried uswsusp on
> my 32/32 machine it didn't work due to endian problems that were
> supposed to be resolved but I haven't had a chance to pick all the bits
> together that you need.

This one should prevent ioctl numbers changing, too.

diff --git a/kernel/power/power.h b/kernel/power/power.h
index eb461b8..a18b85a 100644
--- a/kernel/power/power.h
+++ b/kernel/power/power.h
@@ -114,23 +114,23 @@ extern int snapshot_image_loaded(struct
* SNAPSHOT_SET_SWAP_AREA ioctl
*/
struct resume_swap_area {
- loff_t offset;
+ u_int64_t offset;
u_int32_t dev;
} __attribute__((packed));

#define SNAPSHOT_IOC_MAGIC '3'
#define SNAPSHOT_FREEZE _IO(SNAPSHOT_IOC_MAGIC, 1)
#define SNAPSHOT_UNFREEZE _IO(SNAPSHOT_IOC_MAGIC, 2)
-#define SNAPSHOT_ATOMIC_SNAPSHOT _IOW(SNAPSHOT_IOC_MAGIC, 3, void *)
+#define SNAPSHOT_ATOMIC_SNAPSHOT _IOW(SNAPSHOT_IOC_MAGIC, 3, u32) /* void * */
#define SNAPSHOT_ATOMIC_RESTORE _IO(SNAPSHOT_IOC_MAGIC, 4)
#define SNAPSHOT_FREE _IO(SNAPSHOT_IOC_MAGIC, 5)
-#define SNAPSHOT_SET_IMAGE_SIZE _IOW(SNAPSHOT_IOC_MAGIC, 6, unsigned long)
-#define SNAPSHOT_AVAIL_SWAP _IOR(SNAPSHOT_IOC_MAGIC, 7, void *)
-#define SNAPSHOT_GET_SWAP_PAGE _IOR(SNAPSHOT_IOC_MAGIC, 8, void *)
+#define SNAPSHOT_SET_IMAGE_SIZE _IOW(SNAPSHOT_IOC_MAGIC, 6, u32) /* unsigned long */
+#define SNAPSHOT_AVAIL_SWAP _IOR(SNAPSHOT_IOC_MAGIC, 7, u32) /* void * */
+#define SNAPSHOT_GET_SWAP_PAGE _IOR(SNAPSHOT_IOC_MAGIC, 8, u32) /* void * */
#define SNAPSHOT_FREE_SWAP_PAGES _IO(SNAPSHOT_IOC_MAGIC, 9)
-#define SNAPSHOT_SET_SWAP_FILE _IOW(SNAPSHOT_IOC_MAGIC, 10, unsigned int)
+#define SNAPSHOT_SET_SWAP_FILE _IOW(SNAPSHOT_IOC_MAGIC, 10, u32) /* unsigned int */
#define SNAPSHOT_S2RAM _IO(SNAPSHOT_IOC_MAGIC, 11)
-#define SNAPSHOT_PMOPS _IOW(SNAPSHOT_IOC_MAGIC, 12, unsigned int)
+#define SNAPSHOT_PMOPS _IOW(SNAPSHOT_IOC_MAGIC, 12, u32) /* unsigned int */
#define SNAPSHOT_SET_SWAP_AREA _IOW(SNAPSHOT_IOC_MAGIC, 13, \
struct resume_swap_area)
#define SNAPSHOT_IOC_MAXNR 13
diff --git a/kernel/power/user.c b/kernel/power/user.c
index 558e18e..d0730c1 100644
--- a/kernel/power/user.c
+++ b/kernel/power/user.c
@@ -215,8 +215,7 @@ static int snapshot_ioctl(struct inode *
{
int error = 0;
struct snapshot_data *data;
- loff_t avail;
- sector_t offset;
+ u64 avail, offset;

if (_IOC_TYPE(cmd) != SNAPSHOT_IOC_MAGIC)
return -ENOTTY;
@@ -286,7 +285,7 @@ static int snapshot_ioctl(struct inode *
case SNAPSHOT_AVAIL_SWAP:
avail = count_swap_pages(data->swap, 1);
avail <<= PAGE_SHIFT;
- error = put_user(avail, (loff_t __user *)arg);
+ error = put_user(avail, (u64 __user *)arg);
break;

case SNAPSHOT_GET_SWAP_PAGE:
@@ -304,7 +303,7 @@ static int snapshot_ioctl(struct inode *
offset = alloc_swapdev_block(data->swap, data->bitmap);
if (offset) {
offset <<= PAGE_SHIFT;
- error = put_user(offset, (sector_t __user *)arg);
+ error = put_user(offset, (u64 __user *)arg);
} else {
error = -ENOSPC;
}

--
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