| To: | linux-mips@linux-mips.org |
|---|---|
| Subject: | Re: fpu, preempt, ptrace |
| From: | Atsushi Nemoto <anemo@mba.ocn.ne.jp> |
| Date: | Wed, 11 May 2005 00:06:20 +0900 (JST) |
| Cc: | ralf@linux-mips.org |
| In-reply-to: | <20050510.121038.111209401.nemoto@toshiba-tops.co.jp> |
| Original-recipient: | rfc822;linux-mips@linux-mips.org |
| References: | <20050510.121038.111209401.nemoto@toshiba-tops.co.jp> |
| Sender: | linux-mips-bounce@linux-mips.org |
>>>>> On Tue, 10 May 2005 12:10:38 +0900 (JST), Atsushi Nemoto >>>>> <anemo@mba.ocn.ne.jp> said: anemo> For now, get_fpu_regs() is used in ptrace code only and the anemo> condition 'tsk == current' should always be false. So we can anemo> just remove _save_fp() call instead of disabling preemption. The get_fpu_regs() fix was insufficient. The caller of the function should disable preemption. And while the caller (sys_ptrace) never pass 'current' to the function, it should be preempt-safe anyway. Please ignore that part of my patch. --- Atsushi Nemoto |
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