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[ARM] Fix mm initialisation with write buffered write allocate caches

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It seems that without the extra tlb flush, we may end up faulting
during the early kernel initialisation because the TLB can't see
the updated page tables.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Russell King 2005-11-02 14:11:35 +00:00 committed by Russell King
parent bfca94590b
commit 6bf7bd6967
1 changed files with 8 additions and 1 deletions
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9
arch/arm/mm/init.c
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@ -486,10 +486,17 @@ static void __init devicemaps_init(struct machine_desc *mdesc)
/* /*
* Ask the machine support to map in the statically mapped devices. * Ask the machine support to map in the statically mapped devices.
* After this point, we can start to touch devices again.
*/ */
if (mdesc->map_io) if (mdesc->map_io)
mdesc->map_io(); mdesc->map_io();
/*
* Finally flush the tlb again - this ensures that we're in a
* consistent state wrt the writebuffer if the writebuffer needs
* draining. After this point, we can start to touch devices
* again.
*/
local_flush_tlb_all();
} }
/* /*