X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=kernel%2Fpower%2Fswap.c;h=a0abf9a463f95bc9948f3ccd10fecddf75401eb8;hb=b732d9680b7a2968823851f1163507ad9c45c8cb;hp=8b1a1b8371459eb7bb2d4b8ba34fbdc98e95ccdd;hpb=99e1221d1a1edac316f7f8116c781f75733b1159;p=linux-2.6

diff --git a/kernel/power/swap.c b/kernel/power/swap.c
index 8b1a1b8371..a0abf9a463 100644
--- a/kernel/power/swap.c
+++ b/kernel/power/swap.c
@@ -28,13 +28,12 @@
 
 #include "power.h"
 
-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));
@@ -72,7 +71,8 @@ static int submit(int rw, pgoff_t page_off, struct page *page,
 	bio->bi_end_io = end_swap_bio_read;
 
 	if (bio_add_page(bio, page, PAGE_SIZE, 0) < PAGE_SIZE) {
-		printk("swsusp: ERROR: adding page to bio at %ld\n", page_off);
+		printk(KERN_ERR "PM: Adding page to bio failed at %ld\n",
+			page_off);
 		bio_put(bio);
 		return -EFAULT;
 	}
@@ -138,7 +138,7 @@ 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;
 
@@ -148,10 +148,11 @@ 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 {
-		printk(KERN_ERR "swsusp: Swap header not found!\n");
+		printk(KERN_ERR "PM: Swap header not found!\n");
 		error = -ENODEV;
 	}
 	return error;
@@ -323,7 +324,8 @@ static int save_image(struct swap_map_handle *handle,
 	struct timeval start;
 	struct timeval stop;
 
-	printk("Saving image data pages (%u pages) ...     ", nr_to_write);
+	printk(KERN_INFO "PM: Saving image data pages (%u pages) ...     ",
+		nr_to_write);
 	m = nr_to_write / 100;
 	if (!m)
 		m = 1;
@@ -363,12 +365,13 @@ static int enough_swap(unsigned int nr_pages)
 {
 	unsigned int free_swap = count_swap_pages(root_swap, 1);
 
-	pr_debug("swsusp: free swap pages: %u\n", free_swap);
+	pr_debug("PM: Free swap pages: %u\n", free_swap);
 	return free_swap > nr_pages + PAGES_FOR_IO;
 }
 
 /**
  *	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;
@@ -385,7 +388,7 @@ int swsusp_write(void)
 
 	error = swsusp_swap_check();
 	if (error) {
-		printk(KERN_ERR "swsusp: Cannot find swap device, try "
+		printk(KERN_ERR "PM: Cannot find swap device, try "
 				"swapon -a.\n");
 		return error;
 	}
@@ -399,7 +402,7 @@ int swsusp_write(void)
 	}
 	header = (struct swsusp_info *)data_of(snapshot);
 	if (!enough_swap(header->pages)) {
-		printk(KERN_ERR "swsusp: Not enough free swap\n");
+		printk(KERN_ERR "PM: Not enough free swap\n");
 		error = -ENOSPC;
 		goto out;
 	}
@@ -414,8 +417,8 @@ int swsusp_write(void)
 
 		if (!error) {
 			flush_swap_writer(&handle);
-			printk("S");
-			error = mark_swapfiles(start);
+			printk(KERN_INFO "PM: S");
+			error = mark_swapfiles(start, flags);
 			printk("|\n");
 		}
 	}
@@ -504,7 +507,8 @@ static int load_image(struct swap_map_handle *handle,
 	int err2;
 	unsigned nr_pages;
 
-	printk("Loading image data pages (%u pages) ...     ", nr_to_read);
+	printk(KERN_INFO "PM: Loading image data pages (%u pages) ...     ",
+		nr_to_read);
 	m = nr_to_read / 100;
 	if (!m)
 		m = 1;
@@ -540,15 +544,22 @@ 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");
+		pr_debug("PM: Image device not initialised\n");
 		return PTR_ERR(resume_bdev);
 	}
 
@@ -567,9 +578,9 @@ int swsusp_read(void)
 	blkdev_put(resume_bdev);
 
 	if (!error)
-		pr_debug("swsusp: Reading resume file was successful\n");
+		pr_debug("PM: Image successfully loaded\n");
 	else
-		pr_debug("swsusp: Error %d resuming\n", error);
+		pr_debug("PM: Error %d resuming\n", error);
 	return error;
 }
 
@@ -601,13 +612,13 @@ int swsusp_check(void)
 		if (error)
 			blkdev_put(resume_bdev);
 		else
-			pr_debug("swsusp: Signature found, resuming\n");
+			pr_debug("PM: Signature found, resuming\n");
 	} else {
 		error = PTR_ERR(resume_bdev);
 	}
 
 	if (error)
-		pr_debug("swsusp: Error %d check for resume file\n", error);
+		pr_debug("PM: Error %d checking image file\n", error);
 
 	return error;
 }
@@ -619,7 +630,7 @@ int swsusp_check(void)
 void swsusp_close(void)
 {
 	if (IS_ERR(resume_bdev)) {
-		pr_debug("swsusp: block device not initialised\n");
+		pr_debug("PM: Image device not initialised\n");
 		return;
 	}