| time.c (c900529f3d9161bfde5cca0754f83b4d3c3e0220) | time.c (7723bfe6f90326ebc139d25f779b369bfff9c8e0) |
|---|---|
| 1// SPDX-License-Identifier: GPL-2.0 2/* 3 * Copyright (C) 1991, 1992 Linus Torvalds 4 * 5 * This file contains the interface functions for the various time related 6 * system calls: time, stime, gettimeofday, settimeofday, adjtime 7 * 8 * Modification history: --- 544 unchanged lines hidden (view full) --- 553 * - 'too large' values [that would result in larger than 554 * MAX_JIFFY_OFFSET values] mean 'infinite timeout' too. 555 * 556 * - all other values are converted to jiffies by either multiplying 557 * the input value by a factor or dividing it with a factor and 558 * handling any 32-bit overflows. 559 * for the details see __msecs_to_jiffies() 560 * | 1// SPDX-License-Identifier: GPL-2.0 2/* 3 * Copyright (C) 1991, 1992 Linus Torvalds 4 * 5 * This file contains the interface functions for the various time related 6 * system calls: time, stime, gettimeofday, settimeofday, adjtime 7 * 8 * Modification history: --- 544 unchanged lines hidden (view full) --- 553 * - 'too large' values [that would result in larger than 554 * MAX_JIFFY_OFFSET values] mean 'infinite timeout' too. 555 * 556 * - all other values are converted to jiffies by either multiplying 557 * the input value by a factor or dividing it with a factor and 558 * handling any 32-bit overflows. 559 * for the details see __msecs_to_jiffies() 560 * |
| 561 * __msecs_to_jiffies() checks for the passed in value being a constant | 561 * msecs_to_jiffies() checks for the passed in value being a constant |
| 562 * via __builtin_constant_p() allowing gcc to eliminate most of the 563 * code, __msecs_to_jiffies() is called if the value passed does not 564 * allow constant folding and the actual conversion must be done at 565 * runtime. 566 * The _msecs_to_jiffies helpers are the HZ dependent conversion 567 * routines found in include/linux/jiffies.h 568 * 569 * Return: jiffies value --- 487 unchanged lines hidden --- | 562 * via __builtin_constant_p() allowing gcc to eliminate most of the 563 * code, __msecs_to_jiffies() is called if the value passed does not 564 * allow constant folding and the actual conversion must be done at 565 * runtime. 566 * The _msecs_to_jiffies helpers are the HZ dependent conversion 567 * routines found in include/linux/jiffies.h 568 * 569 * Return: jiffies value --- 487 unchanged lines hidden --- |