1 files changed, 15 insertions, 5 deletions

diff --git a/kernel/power/swap.c b/kernel/power/swap.c
index 8b1a1b837145..917aba100575 100644
--- a/kernel/power/swap.c
+++ b/kernel/power/swap.c
@@ -33,8 +33,9 @@ extern char resume_file[];
 #define SWSUSP_SIG      "S1SUSPEND"
 
 struct swsusp_header {
-        char reserved[PAGE_SIZE - 20 - sizeof(sector_t)];
+        char reserved[PAGE_SIZE - 20 - sizeof(sector_t) - sizeof(int)];
         sector_t image;
+        unsigned int flags;     /* Flags to pass to the "boot" kernel */
         char    orig_sig[10];
         char    sig[10];
 } __attribute__((packed));
@@ -138,7 +139,7 @@ static int wait_on_bio_chain(struct bio **bio_chain)
  * Saving part
  */
 
-static int mark_swapfiles(sector_t start)
+static int mark_swapfiles(sector_t start, unsigned int flags)
 {
         int error;
 
@@ -148,6 +149,7 @@ static int mark_swapfiles(sector_t start)
                 memcpy(swsusp_header->orig_sig,swsusp_header->sig, 10);
                 memcpy(swsusp_header->sig,SWSUSP_SIG, 10);
                 swsusp_header->image = start;
+                swsusp_header->flags = flags;
                 error = bio_write_page(swsusp_resume_block,
                                         swsusp_header, NULL);
         } else {
@@ -369,6 +371,7 @@ static int enough_swap(unsigned int nr_pages)
 
 /**
  *      swsusp_write - Write entire image and metadata.
+ *      @flags: flags to pass to the "boot" kernel in the image header
  *
  *      It is important _NOT_ to umount filesystems at this point. We want
  *      them synced (in case something goes wrong) but we DO not want to mark
@@ -376,7 +379,7 @@ static int enough_swap(unsigned int nr_pages)
  *      correctly, we'll mark system clean, anyway.)
  */
 
-int swsusp_write(void)
+int swsusp_write(unsigned int flags)
 {
         struct swap_map_handle handle;
         struct snapshot_handle snapshot;
@@ -415,7 +418,7 @@ int swsusp_write(void)
                 if (!error) {
                         flush_swap_writer(&handle);
                         printk("S");
-                        error = mark_swapfiles(start);
+                        error = mark_swapfiles(start, flags);
                         printk("|\n");
                 }
         }
@@ -540,13 +543,20 @@ static int load_image(struct swap_map_handle *handle,
         return error;
 }
 
-int swsusp_read(void)
+/**
+ *      swsusp_read - read the hibernation image.
+ *      @flags_p: flags passed by the "frozen" kernel in the image header should
+ *                be written into this memeory location
+ */
+
+int swsusp_read(unsigned int *flags_p)
 {
         int error;
         struct swap_map_handle handle;
         struct snapshot_handle snapshot;
         struct swsusp_info *header;
 
+        *flags_p = swsusp_header->flags;
         if (IS_ERR(resume_bdev)) {
                 pr_debug("swsusp: block device not initialised\n");
                 return PTR_ERR(resume_bdev);