tree 50179be222c15d5e06f77928331d63843f6fc738
parent 049be07053ebbf0ee8543caea23ae7bdf0765bb2
author Simon Baatz <gmbnomis@gmail.com> 1370895012 +0100
committer Russell King <rmk+kernel@arm.linux.org.uk> 1371461452 +0100

ARM: 7755/1: handle user space mapped pages in flush_kernel_dcache_page

Commit f8b63c1 made flush_kernel_dcache_page a no-op assuming that
the pages it needs to handle are kernel mapped only.  However, for
example when doing direct I/O, pages with user space mappings may
occur.

Thus, continue to do lazy flushing if there are no user space
mappings.  Otherwise, flush the kernel cache lines directly.

Signed-off-by: Simon Baatz <gmbnomis@gmail.com>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Cc: <stable@vger.kernel.org> # 3.2+
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>