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authorRafael J. Wysocki <rjw@sisk.pl>2006-02-01 03:05:07 -0800
committerLinus Torvalds <torvalds@g5.osdl.org>2006-02-01 08:53:12 -0800
commit853609b61ef88b414ffd1613741aa59894334320 (patch)
tree93def4ef8c820fb678bedf31f144b1d85942c181
parente8730eabd45e47e392f230ab8720c4b8537901fc (diff)
[PATCH] swsusp: use bytes as image size units
Make swsusp use bytes as the image size units, which is needed for future compatibility. Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Acked-by: Pavel Machek <pavel@ucw.cz> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
-rw-r--r--Documentation/power/interface.txt2
-rw-r--r--Documentation/power/swsusp.txt2
-rw-r--r--kernel/power/disk.c6
-rw-r--r--kernel/power/power.h4
-rw-r--r--kernel/power/swsusp.c8
5 files changed, 11 insertions, 11 deletions
diff --git a/Documentation/power/interface.txt b/Documentation/power/interface.txt
index bd4ffb5bd49..4117802af0f 100644
--- a/Documentation/power/interface.txt
+++ b/Documentation/power/interface.txt
@@ -44,7 +44,7 @@ it.
/sys/power/image_size controls the size of the image created by
the suspend-to-disk mechanism. It can be written a string
representing a non-negative integer that will be used as an upper
-limit of the image size, in megabytes. The suspend-to-disk mechanism will
+limit of the image size, in bytes. The suspend-to-disk mechanism will
do its best to ensure the image size will not exceed that number. However,
if this turns out to be impossible, it will try to suspend anyway using the
smallest image possible. In particular, if "0" is written to this file, the
diff --git a/Documentation/power/swsusp.txt b/Documentation/power/swsusp.txt
index 08c79d4dc54..b28b7f04abb 100644
--- a/Documentation/power/swsusp.txt
+++ b/Documentation/power/swsusp.txt
@@ -27,7 +27,7 @@ echo shutdown > /sys/power/disk; echo disk > /sys/power/state
echo platform > /sys/power/disk; echo disk > /sys/power/state
-If you want to limit the suspend image size to N megabytes, do
+If you want to limit the suspend image size to N bytes, do
echo N > /sys/power/image_size
diff --git a/kernel/power/disk.c b/kernel/power/disk.c
index e24446f8d8c..f2b3b0ea512 100644
--- a/kernel/power/disk.c
+++ b/kernel/power/disk.c
@@ -367,14 +367,14 @@ power_attr(resume);
static ssize_t image_size_show(struct subsystem * subsys, char *buf)
{
- return sprintf(buf, "%u\n", image_size);
+ return sprintf(buf, "%lu\n", image_size);
}
static ssize_t image_size_store(struct subsystem * subsys, const char * buf, size_t n)
{
- unsigned int size;
+ unsigned long size;
- if (sscanf(buf, "%u", &size) == 1) {
+ if (sscanf(buf, "%lu", &size) == 1) {
image_size = size;
return n;
}
diff --git a/kernel/power/power.h b/kernel/power/power.h
index 7e8492fd142..61beb5e0e92 100644
--- a/kernel/power/power.h
+++ b/kernel/power/power.h
@@ -51,8 +51,8 @@ extern const void __nosave_begin, __nosave_end;
extern unsigned int nr_copy_pages;
extern struct pbe *pagedir_nosave;
-/* Preferred image size in MB (default 500) */
-extern unsigned int image_size;
+/* Preferred image size in bytes (default 500 MB) */
+extern unsigned long image_size;
extern asmlinkage int swsusp_arch_suspend(void);
extern asmlinkage int swsusp_arch_resume(void);
diff --git a/kernel/power/swsusp.c b/kernel/power/swsusp.c
index 55a18d26abe..59c91c148e8 100644
--- a/kernel/power/swsusp.c
+++ b/kernel/power/swsusp.c
@@ -70,12 +70,12 @@
#include "power.h"
/*
- * Preferred image size in MB (tunable via /sys/power/image_size).
+ * Preferred image size in bytes (tunable via /sys/power/image_size).
* When it is set to N, swsusp will do its best to ensure the image
- * size will not exceed N MB, but if that is impossible, it will
+ * size will not exceed N bytes, but if that is impossible, it will
* try to create the smallest image possible.
*/
-unsigned int image_size = 500;
+unsigned long image_size = 500 * 1024 * 1024;
#ifdef CONFIG_HIGHMEM
unsigned int count_highmem_pages(void);
@@ -590,7 +590,7 @@ int swsusp_shrink_memory(void)
if (!tmp)
return -ENOMEM;
pages += tmp;
- } else if (size > (image_size * 1024 * 1024) / PAGE_SIZE) {
+ } else if (size > image_size / PAGE_SIZE) {
tmp = shrink_all_memory(SHRINK_BITE);
pages += tmp;
}