switch_fpu_prepare

Name:FPU state switching for scheduling.* This is a two-stage process:* - switch_fpu_prepare() saves the old state.* This is done within the context of the old process.* - switch_fpu_finish() sets TIF_NEED_FPU_LOAD; the floating point state

Proto:static inline void switch_fpu_prepare(struct fpu *old_fpu, int cpu)

Type:void

Parameter:

Type	Parameter	Name
struct fpu *	old_fpu
int	cpu

574

If static_cpu_has(Onboard FPU ) && Not (flags & I am a kernel thread ) Then

575

If Not These must be called with preempt disabled Then @last_cpu:* Records the last CPU on which this context was loaded into* FPU registers = -1

577

Else @last_cpu:* Records the last CPU on which this context was loaded into* FPU registers = cpu

581

trace_x86_fpu_regs_deactivated(old_fpu)

**Caller**
Name	Describe
__switch_to	switch_to(x,y) should switch tasks from x to y

Source code conversion tool public plug-in interface	X
Support c/c++/esqlc/java Oracle/Informix/Mysql Plug-in can realize: logical Report Code generation and batch code conversion

Function report