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Commit 1bc39742 authored by Simon Baatz's avatar Simon Baatz Committed by Russell King
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ARM: 7755/1: handle user space mapped pages in flush_kernel_dcache_page



Commit f8b63c18 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: default avatarSimon Baatz <gmbnomis@gmail.com>
Reviewed-by: default avatarCatalin Marinas <catalin.marinas@arm.com>
Cc: <stable@vger.kernel.org> # 3.2+
Signed-off-by: default avatarRussell King <rmk+kernel@arm.linux.org.uk>
parent 049be070
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