From af508b34d27e3341287d89e0eae6752fdb1b873f Mon Sep 17 00:00:00 2001 From: "Rafael J. Wysocki" Date: Fri, 26 Oct 2007 00:59:31 +0200 Subject: Hibernation: Introduce SNAPSHOT_GET_IMAGE_SIZE ioctl Add a new ioctl, SNAPSHOT_GET_IMAGE_SIZE, returning the size of the (just created) hibernation image, to the hibernation userland interface. This ioctl is necessary so that the userland utilities using the interface need not access the hibernation image header, owned by the kernel, in order to obtain the size of the image. Signed-off-by: Rafael J. Wysocki Acked-by: Pavel Machek Signed-off-by: Len Brown --- kernel/power/snapshot.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) (limited to 'kernel/power/snapshot.c') diff --git a/kernel/power/snapshot.c b/kernel/power/snapshot.c index 78039b477d2b..c5ce0f34a5d4 100644 --- a/kernel/power/snapshot.c +++ b/kernel/power/snapshot.c @@ -1264,12 +1264,17 @@ static char *check_image_kernel(struct swsusp_info *info) } #endif /* CONFIG_ARCH_HIBERNATION_HEADER */ +unsigned long snapshot_get_image_size(void) +{ + return nr_copy_pages + nr_meta_pages + 1; +} + static int init_header(struct swsusp_info *info) { memset(info, 0, sizeof(struct swsusp_info)); info->num_physpages = num_physpages; info->image_pages = nr_copy_pages; - info->pages = nr_copy_pages + nr_meta_pages + 1; + info->pages = snapshot_get_image_size(); info->size = info->pages; info->size <<= PAGE_SHIFT; return init_header_complete(info); -- cgit v1.2.3