| To: | linux-mips@linux-mips.org |
|---|---|
| Subject: | Possible shared mapping bug in 2.4.23 (at least MIPS/Sparc) |
| From: | Peter Horton <pdh@colonel-panic.org> |
| Date: | Sat, 13 Dec 2003 11:41:34 +0000 |
| Cc: | linux-kernel@vger.kernel.org |
| Original-recipient: | rfc822;linux-mips@linux-mips.org |
| Sender: | linux-mips-bounce@linux-mips.org |
| User-agent: | Mutt/1.3.28i |
The current MIPS 2.4 kernel (from CVS) currently allows fixed shared mappings to violate D-cache aliasing constraints. The check for illegal fixed mappings is done in arch_get_unmapped_area(), but these mappings are granted in get_unmapped_area() and arch_get_unmapped_area() is never called. A quick look at sparc and sparc64 seem to show the same problem. P. |
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