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Message-Id: <20220510130731.025055387@linuxfoundation.org>
Date: Tue, 10 May 2022 15:08:09 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-kernel@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
stable@...r.kernel.org, Haimin Zhang <tcs.kernel@...il.com>,
Chaitanya Kulkarni <kch@...dia.com>,
Christoph Hellwig <hch@....de>, Jens Axboe <axboe@...nel.dk>,
Nobel Barakat <nobelbarakat@...gle.com>
Subject: [PATCH 5.4 40/52] block-map: add __GFP_ZERO flag for alloc_page in function bio_copy_kern
From: Haimin Zhang <tcs.kernel@...il.com>
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@...il.com>
Reviewed-by: Chaitanya Kulkarni <kch@...dia.com>
Reviewed-by: Christoph Hellwig <hch@....de>
Link: https://lore.kernel.org/r/20220216084038.15635-1-tcs.kernel@gmail.com
Signed-off-by: Jens Axboe <axboe@...nel.dk>
[nobelbarakat: Backported to 5.4: Manually added __GFP_ZERO flag]
Signed-off-by: Nobel Barakat <nobelbarakat@...gle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
block/bio.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/block/bio.c
+++ b/block/bio.c
@@ -1627,7 +1627,7 @@ struct bio *bio_copy_kern(struct request
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;
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