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    Subject[PATCH 5.16 027/186] block-map: add __GFP_ZERO flag for alloc_page in function bio_copy_kern
    Date
    From: Haimin Zhang <tcs.kernel@gmail.com>

    [ Upstream commit cc8f7fe1f5eab010191aa4570f27641876fa1267 ]

    Add __GFP_ZERO flag for alloc_page in function bio_copy_kern to initialize
    the buffer of a bio.

    Signed-off-by: Haimin Zhang <tcs.kernel@gmail.com>
    Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com>
    Reviewed-by: Christoph Hellwig <hch@lst.de>
    Link: https://lore.kernel.org/r/20220216084038.15635-1-tcs.kernel@gmail.com
    Signed-off-by: Jens Axboe <axboe@kernel.dk>
    Signed-off-by: Sasha Levin <sashal@kernel.org>
    ---
    block/blk-map.c | 2 +-
    1 file changed, 1 insertion(+), 1 deletion(-)

    diff --git a/block/blk-map.c b/block/blk-map.c
    index 4526adde01564..c7f71d83eff18 100644
    --- a/block/blk-map.c
    +++ b/block/blk-map.c
    @@ -446,7 +446,7 @@ static struct bio *bio_copy_kern(struct request_queue *q, void *data,
    if (bytes > len)
    bytes = len;

    - page = alloc_page(GFP_NOIO | gfp_mask);
    + page = alloc_page(GFP_NOIO | __GFP_ZERO | gfp_mask);
    if (!page)
    goto cleanup;

    --
    2.34.1


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