On Mit, 2010-06-02 at 15:33 +1000, Paul Mackerras wrote:=20

This fixes a sporadic oops at boot on G5 Power Macs.  The table_end
variable has the address of the last byte of the table.  Adding on
PAGE_SIZE means we flush too much, and if the page after the table
is not mapped for any reason, the kernel will oops.  Instead we add
on 1 because flush_dcache_range() interprets its second argument as
the first byte past the range to be flushed.
=20
Signed-off-by: Paul Mackerras <redacted>

Reviewed-by: Michel D=C3=A4nzer <redacted>
Tested-by: Michel D=C3=A4nzer <redacted>


Thanks for the good catch, Paul.

agp.c

ge_data *bridge)

 	bridge->gatt_table_real =3D (u32 *) table;
 	/* Need to clear out any dirty data still sitting in caches */
 	flush_dcache_range((unsigned long)table,
-			   (unsigned long)(table_end + PAGE_SIZE));
+			   (unsigned long)table_end + 1);
 	bridge->gatt_table =3D vmap(pages, (1 << page_order), 0, PAGE_KERNEL_NC=

G);

=20
 	if (bridge->gatt_table =3D=3D NULL)

--=20
Earthling Michel D=C3=A4nzer           |                http://www.vmware.c=
om
Libre software enthusiast         |          Debian, X and DRI developer