null_blk: use non-deprecated lib functions

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Use library helper memcpy_page() to copy source page into destination
instead of having duplicate code in copy_to_nullb() & copy_from_nullb().
In copy_from_nullb() also replace the memset call with zero_user().

Use library helper memset_page() to set the buffer to 0xFF instead of
having duplicate code.

This also removes deprecated API kmap_atomic() from copy_to_nullb()
copy_from_nullb() and nullb_fill_pattern(),
from :include/linux/highmem.h:
"kmap_atomic - Atomically map a page for temporary usage - Deprecated!"

Signed-off-by: Chaitanya Kulkarni <kch@nvidia.com>
Link: https://lore.kernel.org/r/20230330184926.64209-2-kch@nvidia.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>

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Chaitanya Kulkarni 2023-03-30 11:49:25 -07:00 • committed by Jens Axboe

parent 06965037ce

commit fbb5615f9f

1 changed files with 7 additions and 22 deletions

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drivers/block/null_blk/main.c

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