提交 853609b6 编写于 作者: R Rafael J. Wysocki 提交者: Linus Torvalds

[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: NRafael J. Wysocki <rjw@sisk.pl>
Acked-by: NPavel Machek <pavel@ucw.cz>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
上级 e8730eab
......@@ -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
......
......@@ -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
......
......@@ -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;
}
......
......@@ -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);
......
......@@ -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;
}
......
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