tree f8c0e9463de01323db2cb1a62f4eb83adb5ce7ca
parent bac30d1a78d0f11c613968fc8b351a91ed465386
author Eugene Surovegin <ebs@ebshome.net> 1143569592 -0800
committer Paul Mackerras <paulus@samba.org> 1143600255 +1100

[PATCH] lock PTE before updating it in 440/BookE page fault handler

Fix 44x and BookE page fault handler to correctly lock PTE before
trying to pte_update() it, otherwise this PTE might be swapped out
after pte_present() check but before pte_uptdate() call, resulting in
corrupted PTE. This can happen with enabled preemption and low memory
condition.

Signed-off-by: Eugene Surovegin <ebs@ebshome.net>
Signed-off-by: Paul Mackerras <paulus@samba.org>