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block-map: add __GFP_ZERO flag for alloc_page in function bio_copy_kern 

commit cc8f7fe1f5eab010191aa4570f27641876fa1267 upstream.

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>
[nobelbarakat: Backported to 5.4: Manually added __GFP_ZERO flag]
Signed-off-by: Nobel Barakat <nobelbarakat@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Haimin Zhang 2022-02-16 16:40:38 +08:00 committed by Greg Kroah-Hartman
parent 9588ac2edd
commit c7337efd1d
1 changed files with 1 additions and 1 deletions
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block/bio.c
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@ -1627,7 +1627,7 @@ struct bio *bio_copy_kern(struct request_queue *q, void *data, unsigned int len,
if (bytes > len)
bytes = len;
page = alloc_page(q->bounce_gfp | gfp_mask);
page = alloc_page(q->bounce_gfp | __GFP_ZERO | gfp_mask);
if (!page)
goto cleanup;