mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-22 18:44:44 +08:00
278d91c460
Make the FPU operate in non-lazy mode under SMP so that when the process that is currently using the FPU migrates to a different CPU, we don't have to ping its previous CPU to flush the FPU context. Signed-off-by: Akira Takeuchi <takeuchi.akr@jp.panasonic.com> Signed-off-by: Kiyoshi Owada <owada.kiyoshi@jp.panasonic.com> Signed-off-by: David Howells <dhowells@redhat.com>
31 lines
900 B
C
31 lines
900 B
C
/* MN10300 FPU management
|
|
*
|
|
* Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
|
|
* Written by David Howells (dhowells@redhat.com)
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public Licence
|
|
* as published by the Free Software Foundation; either version
|
|
* 2 of the Licence, or (at your option) any later version.
|
|
*/
|
|
#include <asm/fpu.h>
|
|
|
|
/*
|
|
* handle an FPU operational exception
|
|
* - there's a possibility that if the FPU is asynchronous, the signal might
|
|
* be meant for a process other than the current one
|
|
*/
|
|
asmlinkage
|
|
void unexpected_fpu_exception(struct pt_regs *regs, enum exception_code code)
|
|
{
|
|
panic("An FPU exception was received, but there's no FPU enabled.");
|
|
}
|
|
|
|
/*
|
|
* fill in the FPU structure for a core dump
|
|
*/
|
|
int dump_fpu(struct pt_regs *regs, elf_fpregset_t *fpreg)
|
|
{
|
|
return 0; /* not valid */
|
|
}
|