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authorRussell King <rmk@dyn-67.arm.linux.org.uk>2005-11-02 14:11:35 (GMT)
committerRussell King <rmk+kernel@arm.linux.org.uk>2005-11-02 14:11:35 (GMT)
commit6bf7bd6967b1cdde1fe953b0edb951966799fb44 (patch)
tree4b2537d200a51e13ea9e2b439c58411f7769f325 /arch
parentbfca94590bfd3dcd958c542d2fb6406518150fee (diff)
downloadlinux-fsl-qoriq-6bf7bd6967b1cdde1fe953b0edb951966799fb44.tar.xz
[ARM] Fix mm initialisation with write buffered write allocate caches
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>
Diffstat (limited to 'arch')
-rw-r--r--arch/arm/mm/init.c9
1 files changed, 8 insertions, 1 deletions
diff --git a/arch/arm/mm/init.c b/arch/arm/mm/init.c
index fd079ff..c168f32 100644
--- a/arch/arm/mm/init.c
+++ b/arch/arm/mm/init.c
@@ -486,10 +486,17 @@ static void __init devicemaps_init(struct machine_desc *mdesc)
/*
* 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)
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();
}
/*