diff options
| author | Christoph Hellwig <hch@lst.de> | 2021-07-23 15:50:17 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2021-07-23 17:43:28 -0700 |
| commit | 8dad53a11f8d94dceb540a5f8f153484f42be84b (patch) | |
| tree | ed9848784ee4edb85c760823501df4dc5be134a8 /include/sound/soc-topology.h | |
| parent | 236e9f1538523d3d380dda1cc99571d587058f37 (diff) | |
mm: call flush_dcache_page() in memcpy_to_page() and memzero_page()
memcpy_to_page and memzero_page can write to arbitrary pages, which
could be in the page cache or in high memory, so call
flush_kernel_dcache_pages to flush the dcache.
This is a problem when using these helpers on dcache challeneged
architectures. Right now there are just a few users, chances are no one
used the PC floppy driver, the aha1542 driver for an ISA SCSI HBA, and a
few advanced and optional btrfs and ext4 features on those platforms yet
since the conversion.
Link: https://lkml.kernel.org/r/20210713055231.137602-2-hch@lst.de
Fixes: bb90d4bc7b6a ("mm/highmem: Lift memcpy_[to|from]_page to core")
Fixes: 28961998f858 ("iov_iter: lift memzero_page() to highmem.h")
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Ira Weiny <ira.weiny@intel.com>
Cc: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/sound/soc-topology.h')
0 files changed, 0 insertions, 0 deletions