int swsusp_check(void) { int error; 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)); if ((error = bio_read_page(0, &swsusp_header))) return error; 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(0, &swsusp_header); } else { return -EINVAL; } if (error) blkdev_put(resume_bdev); else pr_debug("swsusp: Signature found, resuming\n"); } else { error = PTR_ERR(resume_bdev); } if (error) pr_debug("swsusp: Error %d check for resume file\n", error); return error; }
static int __init check_sig(void) { int error; memset(&swsusp_header, 0, sizeof(swsusp_header)); if ((error = bio_read_page(0, &swsusp_header))) return error; 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(0, &swsusp_header); } else { pr_debug(KERN_ERR "swsusp: Suspend partition has wrong signature?\n"); return -EINVAL; } if (!error) pr_debug("swsusp: Signature found, resuming\n"); return error; }