mm: rmap: fix cache flush on THP pages

Patch series "Fix some bugs related to ramp and dax", v7.

Patch 1-2 fix a cache flush bug, because subsequent patches depend on
those on those changes, there are placed in this series.  Patch 3-4 are
preparation for fixing a dax bug in patch 5.  Patch 6 is code cleanup
since the previous patch removes the usage of follow_invalidate_pte().


This patch (of 6):

The flush_cache_page() only remove a PAGE_SIZE sized range from the cache.
However, it does not cover the full pages in a THP except a head page. 
Replace it with flush_cache_range() to fix this issue.  At least, no
problems were found due to this.  Maybe because the architectures that
have virtual indexed caches is less.

Link: https://lkml.kernel.org/r/[email protected]
Link: https://lkml.kernel.org/r/[email protected]
Fixes: f27176cfc363 ("mm: convert page_mkclean_one() to use page_vma_mapped_walk()")
Signed-off-by: Muchun Song <[email protected]>
Reviewed-by: Yang Shi <[email protected]>
Reviewed-by: Dan Williams <[email protected]>
Reviewed-by: Christoph Hellwig <[email protected]>
Cc: Matthew Wilcox <[email protected]>
Cc: Jan Kara <[email protected]>
Cc: Al Viro <[email protected]>
Cc: Alistair Popple <[email protected]>
Cc: Yang Shi <[email protected]>
Cc: Ralph Campbell <[email protected]>
Cc: Hugh Dickins <[email protected]>
Cc: Xiyu Yang <[email protected]>
Cc: "Kirill A. Shutemov" <[email protected]>
Cc: Ross Zwisler <[email protected]>
Cc: Xiongchun Duan <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>

0 files changed, 0 insertions, 0 deletions