| To: | unlisted-recipients:; (no To-header on input) |
|---|---|
| Subject: | Re: [PATCH] TX49 MFC0 bug workaround |
| From: | Sergei Shtylylov <sshtylyov@ru.mvista.com> |
| Date: | Tue, 07 Feb 2006 18:32:20 +0300 |
| Cc: | Atsushi Nemoto <anemo@mba.ocn.ne.jp>, linux-mips@linux-mips.org |
| In-reply-to: | <20060203.112253.104030567.nemoto@toshiba-tops.co.jp> |
| Organization: | MontaVista Software Inc. |
| Original-recipient: | rfc822;linux-mips@linux-mips.org |
| References: | <43E25381.4060309@ru.mvista.com> <20060203.101705.41198541.nemoto@toshiba-tops.co.jp> <43E2BC1F.7080505@ru.mvista.com> <20060203.112253.104030567.nemoto@toshiba-tops.co.jp> |
| Sender: | linux-mips-bounce@linux-mips.org |
| User-agent: | Mozilla/5.0 (X11; U; Linux i686; rv:1.7.2) Gecko/20040803 |
Hello. Atsushi Nemoto wrote: On Fri, 03 Feb 2006 05:12:47 +0300, Sergei Shtylylov <sshtylyov@ru.mvista.com> said:sshtylyov> If I don't mistake, the offending code is in sshtylyov> local_irq_disable, local_irq_save, and local_irq_restore sshtylyov> macros. The effect would be a crash on any exception taken sshtylyov> once interrupts get disabled in a module (*and* that code sshtylyov> happens to fall on a page boundary)... nasty. :-( ... and yet worse: any external interrupts actually blocked from CPU forever by Status.EXL set (which then will never be cleared after the errata triggers). Right. And it can really happen. --- Atsushi Nemoto WBR, Sergei |
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