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ARC: [mm] optimise VIPT dcache aliasing 2/x

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Non-congruent SRC page in copy_user_page() is dcache clean in the end -
so record that fact, to avoid a subsequent extraneous flush.

Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
This commit is contained in:
Vineet Gupta 2013-05-23 12:02:00 +05:30
parent 5971bc719d
commit fedf5b9baf
1 changed files with 1 additions and 0 deletions
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arch/arc/mm/cache_arc700.c
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@ -742,6 +742,7 @@ void copy_user_highpage(struct page *to, struct page *from,
*/
if (clean_src_k_mappings) {
__flush_dcache_page(kfrom, kfrom);
clear_bit(PG_arch_1, &from->flags);
} else {
set_bit(PG_arch_1, &from->flags);
}