jiffies.c (f95a985781e9e986992351c971af7f7e46e06ed5) jiffies.c (d6ad418763888f617ac5b4849823e4cd670df1dd)
1/***********************************************************************
2* linux/kernel/time/jiffies.c
3*
4* This file contains the jiffies based clocksource.
5*
6* Copyright (C) 2004, 2005 IBM, John Stultz (johnstul@us.ibm.com)
7*
8* This program is free software; you can redistribute it and/or modify

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62 .name = "jiffies",
63 .rating = 1, /* lowest valid rating*/
64 .read = jiffies_read,
65 .mask = 0xffffffff, /*32bits*/
66 .mult = NSEC_PER_JIFFY << JIFFIES_SHIFT, /* details above */
67 .shift = JIFFIES_SHIFT,
68};
69
1/***********************************************************************
2* linux/kernel/time/jiffies.c
3*
4* This file contains the jiffies based clocksource.
5*
6* Copyright (C) 2004, 2005 IBM, John Stultz (johnstul@us.ibm.com)
7*
8* This program is free software; you can redistribute it and/or modify

--- 53 unchanged lines hidden (view full) ---

62 .name = "jiffies",
63 .rating = 1, /* lowest valid rating*/
64 .read = jiffies_read,
65 .mask = 0xffffffff, /*32bits*/
66 .mult = NSEC_PER_JIFFY << JIFFIES_SHIFT, /* details above */
67 .shift = JIFFIES_SHIFT,
68};
69
70__cacheline_aligned_in_smp DEFINE_SEQLOCK(jiffies_lock);
71
70#if (BITS_PER_LONG < 64)
71u64 get_jiffies_64(void)
72{
73 unsigned long seq;
74 u64 ret;
75
76 do {
72#if (BITS_PER_LONG < 64)
73u64 get_jiffies_64(void)
74{
75 unsigned long seq;
76 u64 ret;
77
78 do {
77 seq = read_seqbegin(&xtime_lock);
79 seq = read_seqbegin(&jiffies_lock);
78 ret = jiffies_64;
80 ret = jiffies_64;
79 } while (read_seqretry(&xtime_lock, seq));
81 } while (read_seqretry(&jiffies_lock, seq));
80 return ret;
81}
82EXPORT_SYMBOL(get_jiffies_64);
83#endif
84
85EXPORT_SYMBOL(jiffies);
86
87static int __init init_jiffies_clocksource(void)

--- 40 unchanged lines hidden --- 		82 return ret;
83}
84EXPORT_SYMBOL(get_jiffies_64);
85#endif
86
87EXPORT_SYMBOL(jiffies);
88
89static int __init init_jiffies_clocksource(void)

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