diff options
Diffstat (limited to 'kernel/power')
| -rw-r--r-- | kernel/power/swap.c | 42 |
1 files changed, 27 insertions, 15 deletions
diff --git a/kernel/power/swap.c b/kernel/power/swap.c index 3581f8f86ac..b18c155cbb6 100644 --- a/kernel/power/swap.c +++ b/kernel/power/swap.c @@ -33,12 +33,14 @@ extern char resume_file[]; #define SWSUSP_SIG "S1SUSPEND" -static struct swsusp_header { +struct swsusp_header { char reserved[PAGE_SIZE - 20 - sizeof(sector_t)]; sector_t image; char orig_sig[10]; char sig[10]; -} __attribute__((packed, aligned(PAGE_SIZE))) swsusp_header; +} __attribute__((packed)); + +static struct swsusp_header *swsusp_header; /* * General things @@ -141,14 +143,14 @@ static int mark_swapfiles(sector_t start) { int error; - bio_read_page(swsusp_resume_block, &swsusp_header, NULL); - if (!memcmp("SWAP-SPACE",swsusp_header.sig, 10) || - !memcmp("SWAPSPACE2",swsusp_header.sig, 10)) { - memcpy(swsusp_header.orig_sig,swsusp_header.sig, 10); - memcpy(swsusp_header.sig,SWSUSP_SIG, 10); - swsusp_header.image = start; + bio_read_page(swsusp_resume_block, swsusp_header, NULL); + if (!memcmp("SWAP-SPACE",swsusp_header->sig, 10) || + !memcmp("SWAPSPACE2",swsusp_header->sig, 10)) { + memcpy(swsusp_header->orig_sig,swsusp_header->sig, 10); + memcpy(swsusp_header->sig,SWSUSP_SIG, 10); + swsusp_header->image = start; error = bio_write_page(swsusp_resume_block, - &swsusp_header, NULL); + swsusp_header, NULL); } else { printk(KERN_ERR "swsusp: Swap header not found!\n"); error = -ENODEV; @@ -564,7 +566,7 @@ int swsusp_read(void) if (error < PAGE_SIZE) return error < 0 ? error : -EFAULT; header = (struct swsusp_info *)data_of(snapshot); - error = get_swap_reader(&handle, swsusp_header.image); + error = get_swap_reader(&handle, swsusp_header->image); if (!error) error = swap_read_page(&handle, header, NULL); if (!error) @@ -591,17 +593,17 @@ int swsusp_check(void) resume_bdev = open_by_devnum(swsusp_resume_device, FMODE_READ); if (!IS_ERR(resume_bdev)) { set_blocksize(resume_bdev, PAGE_SIZE); - memset(&swsusp_header, 0, sizeof(swsusp_header)); + memset(swsusp_header, 0, sizeof(PAGE_SIZE)); error = bio_read_page(swsusp_resume_block, - &swsusp_header, NULL); + swsusp_header, NULL); if (error) return error; - if (!memcmp(SWSUSP_SIG, swsusp_header.sig, 10)) { - memcpy(swsusp_header.sig, swsusp_header.orig_sig, 10); + if (!memcmp(SWSUSP_SIG, swsusp_header->sig, 10)) { + memcpy(swsusp_header->sig, swsusp_header->orig_sig, 10); /* Reset swap signature now */ error = bio_write_page(swsusp_resume_block, - &swsusp_header, NULL); + swsusp_header, NULL); } else { return -EINVAL; } @@ -632,3 +634,13 @@ void swsusp_close(void) blkdev_put(resume_bdev); } + +static int swsusp_header_init(void) +{ + swsusp_header = (struct swsusp_header*) __get_free_page(GFP_KERNEL); + if (!swsusp_header) + panic("Could not allocate memory for swsusp_header\n"); + return 0; +} + +core_initcall(swsusp_header_init); |