trace.c revision 1eede070a59e1cc73da51e1aaa00d9ab86572cfc
1eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds/* 2eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds * drivers/base/power/trace.c 3eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds * 4eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds * Copyright (C) 2006 Linus Torvalds 5eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds * 6eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds * Trace facility for suspend/resume problems, when none of the 7eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds * devices may be working. 8eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds */ 9eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds 10eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds#include <linux/resume-trace.h> 11eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds#include <linux/rtc.h> 12eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds 13eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds#include <asm/rtc.h> 14eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds 15eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds#include "power.h" 16eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds 17eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds/* 18eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds * Horrid, horrid, horrid. 19eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds * 20eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds * It turns out that the _only_ piece of hardware that actually 21eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds * keeps its value across a hard boot (and, more importantly, the 22eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds * POST init sequence) is literally the realtime clock. 23eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds * 24eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds * Never mind that an RTC chip has 114 bytes (and often a whole 25eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds * other bank of an additional 128 bytes) of nice SRAM that is 26eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds * _designed_ to keep data - the POST will clear it. So we literally 27eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds * can just use the few bytes of actual time data, which means that 28eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds * we're really limited. 29eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds * 30eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds * It means, for example, that we can't use the seconds at all 31eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds * (since the time between the hang and the boot might be more 32eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds * than a minute), and we'd better not depend on the low bits of 33eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds * the minutes either. 34eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds * 35eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds * There are the wday fields etc, but I wouldn't guarantee those 36eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds * are dependable either. And if the date isn't valid, either the 37eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds * hw or POST will do strange things. 38eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds * 39eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds * So we're left with: 40eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds * - year: 0-99 41eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds * - month: 0-11 42eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds * - day-of-month: 1-28 43eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds * - hour: 0-23 44eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds * - min: (0-30)*2 45eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds * 46eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds * Giving us a total range of 0-16128000 (0xf61800), ie less 47eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds * than 24 bits of actual data we can save across reboots. 48eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds * 49eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds * And if your box can't boot in less than three minutes, 50eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds * you're screwed. 51eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds * 52eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds * Now, almost 24 bits of data is pitifully small, so we need 53eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds * to be pretty dense if we want to use it for anything nice. 54eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds * What we do is that instead of saving off nice readable info, 55eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds * we save off _hashes_ of information that we can hopefully 56eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds * regenerate after the reboot. 57eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds * 58eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds * In particular, this means that we might be unlucky, and hit 59eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds * a case where we have a hash collision, and we end up not 60eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds * being able to tell for certain exactly which case happened. 61eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds * But that's hopefully unlikely. 62eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds * 63eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds * What we do is to take the bits we can fit, and split them 64eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds * into three parts (16*997*1009 = 16095568), and use the values 65eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds * for: 66eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds * - 0-15: user-settable 67eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds * - 0-996: file + line number 68eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds * - 0-1008: device 69eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds */ 70eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds#define USERHASH (16) 71eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds#define FILEHASH (997) 72eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds#define DEVHASH (1009) 73eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds 74eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds#define DEVSEED (7919) 75eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds 76eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvaldsstatic unsigned int dev_hash_value; 77eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds 78eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvaldsstatic int set_magic_time(unsigned int user, unsigned int file, unsigned int device) 79eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds{ 80eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds unsigned int n = user + USERHASH*(file + FILEHASH*device); 81eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds 82eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds // June 7th, 2006 83eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds static struct rtc_time time = { 84eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds .tm_sec = 0, 85eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds .tm_min = 0, 86eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds .tm_hour = 0, 87eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds .tm_mday = 7, 88eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds .tm_mon = 5, // June - counting from zero 89eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds .tm_year = 106, 90eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds .tm_wday = 3, 91eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds .tm_yday = 160, 92eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds .tm_isdst = 1 93eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds }; 94eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds 95eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds time.tm_year = (n % 100); 96eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds n /= 100; 97eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds time.tm_mon = (n % 12); 98eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds n /= 12; 99eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds time.tm_mday = (n % 28) + 1; 100eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds n /= 28; 101eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds time.tm_hour = (n % 24); 102eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds n /= 24; 103eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds time.tm_min = (n % 20) * 3; 104eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds n /= 20; 105eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds set_rtc_time(&time); 106eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds return n ? -1 : 0; 107eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds} 108eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds 109eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvaldsstatic unsigned int read_magic_time(void) 110eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds{ 111eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds struct rtc_time time; 112eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds unsigned int val; 113eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds 114eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds get_rtc_time(&time); 115eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds printk("Time: %2d:%02d:%02d Date: %02d/%02d/%02d\n", 116eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds time.tm_hour, time.tm_min, time.tm_sec, 117f059bca1c57f665211dc23de1fb31c1849b65c7bRafael J. Wysocki time.tm_mon + 1, time.tm_mday, time.tm_year % 100); 118eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds val = time.tm_year; /* 100 years */ 119eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds if (val > 100) 120eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds val -= 100; 121eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds val += time.tm_mon * 100; /* 12 months */ 122eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds val += (time.tm_mday-1) * 100 * 12; /* 28 month-days */ 123eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds val += time.tm_hour * 100 * 12 * 28; /* 24 hours */ 124eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds val += (time.tm_min / 3) * 100 * 12 * 28 * 24; /* 20 3-minute intervals */ 125eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds return val; 126eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds} 127eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds 128eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds/* 129eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds * This is just the sdbm hash function with a user-supplied 130eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds * seed and final size parameter. 131eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds */ 132eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvaldsstatic unsigned int hash_string(unsigned int seed, const char *data, unsigned int mod) 133eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds{ 134eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds unsigned char c; 135eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds while ((c = *data++) != 0) { 136eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds seed = (seed << 16) + (seed << 6) - seed + c; 137eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds } 138eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds return seed % mod; 139eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds} 140eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds 141eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvaldsvoid set_trace_device(struct device *dev) 142eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds{ 143eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds dev_hash_value = hash_string(DEVSEED, dev->bus_id, DEVHASH); 144eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds} 14544bf4cea43816d43deab73c1c16361e899996eaaNigel CunninghamEXPORT_SYMBOL(set_trace_device); 146eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds 147eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds/* 148eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds * We could just take the "tracedata" index into the .tracedata 149eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds * section instead. Generating a hash of the data gives us a 150eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds * chance to work across kernel versions, and perhaps more 151eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds * importantly it also gives us valid/invalid check (ie we will 152eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds * likely not give totally bogus reports - if the hash matches, 153eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds * it's not any guarantee, but it's a high _likelihood_ that 154eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds * the match is valid). 155eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds */ 156eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvaldsvoid generate_resume_trace(void *tracedata, unsigned int user) 157eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds{ 158eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds unsigned short lineno = *(unsigned short *)tracedata; 159eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds const char *file = *(const char **)(tracedata + 2); 160eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds unsigned int user_hash_value, file_hash_value; 161eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds 162eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds user_hash_value = user % USERHASH; 163eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds file_hash_value = hash_string(lineno, file, FILEHASH); 164eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds set_magic_time(user_hash_value, file_hash_value, dev_hash_value); 165eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds} 16644bf4cea43816d43deab73c1c16361e899996eaaNigel CunninghamEXPORT_SYMBOL(generate_resume_trace); 167eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds 168eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvaldsextern char __tracedata_start, __tracedata_end; 169eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvaldsstatic int show_file_hash(unsigned int value) 170eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds{ 171eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds int match; 172eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds char *tracedata; 173eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds 174eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds match = 0; 17544bf4cea43816d43deab73c1c16361e899996eaaNigel Cunningham for (tracedata = &__tracedata_start ; tracedata < &__tracedata_end ; 17644bf4cea43816d43deab73c1c16361e899996eaaNigel Cunningham tracedata += 2 + sizeof(unsigned long)) { 177eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds unsigned short lineno = *(unsigned short *)tracedata; 178eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds const char *file = *(const char **)(tracedata + 2); 179eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds unsigned int hash = hash_string(lineno, file, FILEHASH); 180eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds if (hash != value) 181eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds continue; 182eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds printk(" hash matches %s:%u\n", file, lineno); 183eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds match++; 184eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds } 185eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds return match; 186eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds} 187eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds 188eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvaldsstatic int show_dev_hash(unsigned int value) 189eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds{ 190eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds int match = 0; 1911eede070a59e1cc73da51e1aaa00d9ab86572cfcRafael J. Wysocki struct list_head *entry = dpm_list.prev; 192eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds 1931eede070a59e1cc73da51e1aaa00d9ab86572cfcRafael J. Wysocki while (entry != &dpm_list) { 194eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds struct device * dev = to_device(entry); 195eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds unsigned int hash = hash_string(DEVSEED, dev->bus_id, DEVHASH); 196eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds if (hash == value) { 197eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds printk(" hash matches device %s\n", dev->bus_id); 198eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds match++; 199eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds } 200eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds entry = entry->prev; 201eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds } 202eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds return match; 203eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds} 204eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds 205eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvaldsstatic unsigned int hash_value_early_read; 206eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds 207eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvaldsstatic int early_resume_init(void) 208eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds{ 209eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds hash_value_early_read = read_magic_time(); 210eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds return 0; 211eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds} 212eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds 213eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvaldsstatic int late_resume_init(void) 214eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds{ 215eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds unsigned int val = hash_value_early_read; 216eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds unsigned int user, file, dev; 217eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds 218eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds user = val % USERHASH; 219eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds val = val / USERHASH; 220eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds file = val % FILEHASH; 221eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds val = val / FILEHASH; 222eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds dev = val /* % DEVHASH */; 223eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds 224eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds printk(" Magic number: %d:%d:%d\n", user, file, dev); 225eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds show_file_hash(file); 226eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds show_dev_hash(dev); 227eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds return 0; 228eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds} 229eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvalds 230eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvaldscore_initcall(early_resume_init); 231eb71c87a492b7090ff9e8ac46912c480a1687e38Linus Torvaldslate_initcall(late_resume_init); 232