Messages in this thread Patch in this message | | | From | (Bob_Tracy) | Subject | Cyrix/mtrr fix missing from 2.4.3 | Date | Tue, 3 Apr 2001 10:20:12 -0500 (CDT) |
| |
The following fix was omitted from 2.4.3. It corrects a problem where the mtrr code attempts to set up a region twice as large as the user requested.
The original message appeared in linux-kernel on 14 Mar 2001.
--Bob Tracy
----- Forwarded message from David Wragg ----- >From: David Wragg <dpw@doc.ic.ac.uk> >Date: 14 Mar 2001 22:57:21 +0000
Oops, it got broken by the MTRR >32-bit support in 2.4.0-testX. The patch below should fix it.
Joerg, I think this might well fix your Cyrix mtrr problem also.
Let me know how it goes, Dave Wragg
diff -uar linux-2.4.2/arch/i386/kernel/mtrr.c linux-2.4.2.cyrix/arch/i386/kernel/mtrr.c --- linux-2.4.2/arch/i386/kernel/mtrr.c Thu Feb 22 15:24:53 2001 +++ linux-2.4.2.cyrix/arch/i386/kernel/mtrr.c Wed Mar 14 22:28:02 2001 @@ -538,7 +538,7 @@ * Note: shift==0xf means 4G, this is unsupported. */ if (shift) - *size = (reg < 7 ? 0x1UL : 0x40UL) << shift; + *size = (reg < 7 ? 0x1UL : 0x40UL) << (shift - 1); else *size = 0; ----- End of forwarded message from David Wragg ----- - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |