USER_REGSET_ACTIVE_F(9) Machine State USER_REGSET_ACTIVE_F(9)
NAME
user_regset_active_fn - type of active function in struct user_regset
SYNOPSIS
typedef int user_regset_active_fn(struct task_struct * target, const struct user_regset * regset);
ARGUMENTS
target
thread being examined
regset
regset being examined
DESCRIPTION
Return -ENODEV if not available on the hardware found. Return 0 if no interesting state in this thread. Return >0 number of size units of
interesting state. Any get call fetching state beyond that number will see the default initialization state for this data, so a caller that
knows what the default state is need not copy it all out. This call is optional; the pointer is NULL if there is no inexpensive check to
yield a value < n.
Kernel Hackers Manual 2.6. July 2010 USER_REGSET_ACTIVE_F(9)
