btrfs: scrub: remove kmap/kunmap of pages

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All pages that scrub uses in the scrub_block::pagev array are allocated
with GFP_KERNEL and never part of any mapping, so kmap is not necessary,
we only need to know the page address.

In scrub_write_page_to_dev_replace we don't even need to call
flush_dcache_page because of the same reason as above.

Signed-off-by: David Sterba <dsterba@suse.com>

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This commit is contained in:

David Sterba 2020-05-29 15:26:07 +02:00

parent 74ef00185e

commit a8b3a89074

1 changed files with 8 additions and 15 deletions

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fs/btrfs/scrub.c

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