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Kirill Smelkov
linux
Commits
0e948558
Commit
0e948558
authored
Jul 31, 2002
by
Pavel Machek
Committed by
Linus Torvalds
Jul 31, 2002
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[PATCH] swsusp: comment updates and warning fixes
Better comments and less warnings, please apply
parent
4306e20b
Changes
1
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1 changed file
with
19 additions
and
7 deletions
+19
-7
kernel/suspend.c
kernel/suspend.c
+19
-7
No files found.
kernel/suspend.c
View file @
0e948558
...
...
@@ -65,6 +65,7 @@
#include <linux/swapops.h>
extern
void
signal_wake_up
(
struct
task_struct
*
t
);
extern
int
sys_sync
(
void
);
unsigned
char
software_suspend_enabled
=
0
;
...
...
@@ -814,17 +815,17 @@ void do_magic_suspend_2(void)
PRINTK
(
KERN_WARNING
"%sLeaving do_magic_suspend_2...
\n
"
,
name_suspend
);
}
/*
* We try to swap out as much as we can then make a copy of the
* occupied pages in memory so we can make a copy of kernel state
* atomically, the I/O needed by saving won't bother us anymore.
*/
void
do_software_suspend
(
void
)
{
arch_prepare_suspend
();
if
(
prepare_suspend_console
())
printk
(
"%sCan't allocate a console... proceeding
\n
"
,
name_suspend
);
if
(
!
prepare_suspend_processes
())
{
/* At this point, all user processes and "dangerous"
kernel threads are stopped. Free some memory, as we
need half of memory free. */
free_some_memory
();
/* No need to invalidate any vfsmnt list -- they will be valid after resume, anyway.
...
...
@@ -834,8 +835,19 @@ void do_software_suspend(void)
*/
PRINTK
(
"Syncing disks before copy
\n
"
);
do_suspend_sync
();
/* Save state of all device drivers, and stop them. */
if
(
drivers_suspend
()
==
0
)
do_magic
(
0
);
/* This function returns after machine woken up from resume */
/* If stopping device drivers worked, we proceed basically into
* suspend_save_image.
*
* do_magic(0) returns after system is resumed.
*
* do_magic() copies all "used" memory to "free" memory, then
* unsuspends all device drivers, and writes memory to disk
* using normal kernel mechanism.
*/
do_magic
(
0
);
PRINTK
(
"Restarting processes...
\n
"
);
thaw_processes
();
}
...
...
@@ -1003,8 +1015,8 @@ static int bdev_read_page(struct block_device *bdev, long pos, void *buf)
static
int
bdev_write_page
(
struct
block_device
*
bdev
,
long
pos
,
void
*
buf
)
{
struct
buffer_head
*
bh
;
#if 0
struct buffer_head *bh;
BUG_ON (pos%PAGE_SIZE);
bh = __bread(bdev, pos/PAGE_SIZE, PAGE_SIZE);
if (!bh || (!bh->b_data)) {
...
...
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