函数逻辑报告

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v5.5.9

Brick Technologies Co., Ltd

Source Code:kernel\time\timekeeping.c Create Date:2022-07-27 11:42:05
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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函数名称：Scale base by mult/div checking for overflow

函数原型：static int scale64_check_overflow(u64 mult, u64 div, u64 *base)

返回类型：int

参数：

类型参数名称
u64mult
u64div
u64 *base
1002  tmp等于div64_u64_rem - unsigned 64bit divide with 64bit divisor and remainder*@dividend: 64bit dividend*@divisor: 64bit divisor*@remainder: 64bit remainder* This implementation is a comparable to algorithm used by div64_u64
1004  如果sizeof(u64)乘8减ls64 - find last set bit in a 64-bit word*@x: the word to search* This is defined in a similar way as the libc and compiler builtin* ffsll, but returns the position of the most significant set bit小于ls64 - find last set bit in a 64-bit word*@x: the word to search* This is defined in a similar way as the libc and compiler builtin* ffsll, but returns the position of the most significant set bit或sizeof(u64)乘8减ls64 - find last set bit in a 64-bit word*@x: the word to search* This is defined in a similar way as the libc and compiler builtin* ffsll, but returns the position of the most significant set bit小于ls64 - find last set bit in a 64-bit word*@x: the word to search* This is defined in a similar way as the libc and compiler builtin* ffsll, but returns the position of the most significant set bit则返回:负EOVERFLOW
1007  tmp乘等于mult
1008  rem乘等于mult
1010  do_div() is NOT a C function(rem, div)
1011  base等于tmp加rem
1012  返回:0
调用者
名称描述
adjust_historical_crosststampadjust_historical_crosststamp - adjust crosstimestamp previous to current interval*@history: Snapshot representing start of history*@partial_history_cycles: Cycle offset into history (fractional part)*@total_history_cycles: Total history length in