From: David Sterba <dsterba@suse.com>
To: linux-btrfs@vger.kernel.org
Cc: David Sterba <dsterba@suse.com>
Subject: [PATCH 7/9] btrfs: scrub: clean up temporary page variables in scrub_checksum_data
Date: Mon, 1 Jun 2020 17:23:17 +0200 [thread overview]
Message-ID: <0bf855799e7e2b018baf05a76fe1a8e2c03a6b3a.1591024792.git.dsterba@suse.com> (raw)
In-Reply-To: <cover.1591024792.git.dsterba@suse.com>
Add proper variable for the scrub page and use it instead of repeatedly
dereferencing the other structures.
Signed-off-by: David Sterba <dsterba@suse.com>
---
fs/btrfs/scrub.c | 12 +++++-------
1 file changed, 5 insertions(+), 7 deletions(-)
diff --git a/fs/btrfs/scrub.c b/fs/btrfs/scrub.c
index 16c83130d884..19a64c72f38e 100644
--- a/fs/btrfs/scrub.c
+++ b/fs/btrfs/scrub.c
@@ -1786,23 +1786,21 @@ static int scrub_checksum_data(struct scrub_block *sblock)
struct btrfs_fs_info *fs_info = sctx->fs_info;
SHASH_DESC_ON_STACK(shash, fs_info->csum_shash);
u8 csum[BTRFS_CSUM_SIZE];
- u8 *on_disk_csum;
- struct page *page;
+ struct scrub_page *spage;
char *kaddr;
BUG_ON(sblock->page_count < 1);
- if (!sblock->pagev[0]->have_csum)
+ spage = sblock->pagev[0];
+ if (!spage->have_csum)
return 0;
- on_disk_csum = sblock->pagev[0]->csum;
- page = sblock->pagev[0]->page;
- kaddr = page_address(page);
+ kaddr = page_address(spage->page);
shash->tfm = fs_info->csum_shash;
crypto_shash_init(shash);
crypto_shash_digest(shash, kaddr, PAGE_SIZE, csum);
- if (memcmp(csum, on_disk_csum, sctx->csum_size))
+ if (memcmp(csum, spage->csum, sctx->csum_size))
sblock->checksum_error = 1;
return sblock->checksum_error;
--
2.25.0
next prev parent reply other threads:[~2020-06-01 15:23 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-06-01 15:23 [PATCH 0/9] Scrub cleanups David Sterba
2020-06-01 15:23 ` [PATCH 1/9] btrfs: scrub: remove kmap/kunmap of pages David Sterba
2020-06-01 15:23 ` [PATCH 2/9] btrfs: scrub: unify naming of page address variables David Sterba
2020-06-01 15:23 ` [PATCH 3/9] btrfs: scrub: simplify superblock checksum calculation David Sterba
2020-06-01 15:23 ` [PATCH 4/9] btrfs: scrub: remove temporary csum array in scrub_checksum_super David Sterba
2020-06-01 15:23 ` [PATCH 5/9] btrfs: scrub: clean up temporary page variables " David Sterba
2020-06-01 15:23 ` [PATCH 6/9] btrfs: scrub: simplify data block checksum calculation David Sterba
2020-06-01 15:23 ` David Sterba [this message]
2020-06-01 15:23 ` [PATCH 8/9] btrfs: scrub: simplify tree " David Sterba
2020-06-01 15:23 ` [PATCH 9/9] btrfs: scrub: clean up temporary page variables in scrub_checksum_tree_block David Sterba
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