函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:mm\mempolicy.c Create Date:2022-07-27 17:05:34
Last Modify:2020-03-17 22:28:11 Copyright©Brick
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函数名称：COMPAT_SYSCALL_DEFINE3

函数原型：COMPAT_SYSCALL_DEFINE3(set_mempolicy, int, mode, compat_ulong_t __user *, nmask, compat_ulong_t, maxnode)

返回类型：

参数：无

1642  unsigned long __user * nm = NULL
1644  DECLARE_BITMAP(bm, MAX_NUMNODES)
1646  nr_bits等于min_t - return minimum of two values, using the specified type*@type: data type to use*@x: first value*@y: second value(unsignedlong, maxnode - 1, MAX_NUMNODES)
1647  alloc_size等于@a is a power of 2 value (nr_bits, BITS_PER_LONG)除8
1649  如果nmask则
1650  如果compat_get_bitmap(bm, nmask, nr_bits)则返回:负EFAULT
1652  nm等于Allocate user-space memory for the duration of a single system call,* in order to marshall parameters inside a compat thunk.
1653  如果copy_to_user(nm, bm, alloc_size)则返回:负EFAULT
1657  返回:Set the process memory policy