From: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
To: linux-block@vger.kernel.org, linux-ext4@vger.kernel.org,
linux-f2fs-devel@lists.sourceforge.net,
linux-fsdevel@vger.kernel.org
Cc: axboe@kernel.dk, hch@infradead.org, damien.lemoal@wdc.com,
tytso@mit.edu, bvanassche@acm.org, chaitanya.kulkarni@wdc.com,
dave.hansen@intel.com, johannes.thumshirn@wdc.com,
ebiggers@kernel.org, clm@fb.com, adilger.kernel@dilger.ca,
dongli.zhang@oracle.com, dsterba@suse.com, jaegeuk@kernel.org,
ira.weiny@intel.com
Subject: [f2fs-dev] [RFC PATCH 2/8] brd: use memcpy_from_page() in copy_from_brd()
Date: Sun, 7 Feb 2021 11:04:19 -0800 [thread overview]
Message-ID: <20210207190425.38107-3-chaitanya.kulkarni@wdc.com> (raw)
In-Reply-To: <20210207190425.38107-1-chaitanya.kulkarni@wdc.com>
Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
---
drivers/block/brd.c | 9 +++------
1 file changed, 3 insertions(+), 6 deletions(-)
diff --git a/drivers/block/brd.c b/drivers/block/brd.c
index d41b7d489e9f..c1f6d768a1b3 100644
--- a/drivers/block/brd.c
+++ b/drivers/block/brd.c
@@ -220,7 +220,6 @@ static void copy_from_brd(void *dst, struct brd_device *brd,
sector_t sector, size_t n)
{
struct page *page;
- void *src;
unsigned int offset = (sector & (PAGE_SECTORS-1)) << SECTOR_SHIFT;
size_t copy;
@@ -236,11 +235,9 @@ static void copy_from_brd(void *dst, struct brd_device *brd,
sector += copy >> SECTOR_SHIFT;
copy = n - copy;
page = brd_lookup_page(brd, sector);
- if (page) {
- src = kmap_atomic(page);
- memcpy(dst, src, copy);
- kunmap_atomic(src);
- } else
+ if (page)
+ memcpy_from_page(dst, page, offset, copy);
+ else
memset(dst, 0, copy);
}
}
--
2.22.1
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next prev parent reply other threads:[~2021-02-07 19:05 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-02-07 19:04 [f2fs-dev] [RFC PATCH 0/8] use core page calls instead of kmaps Chaitanya Kulkarni
2021-02-07 19:04 ` [f2fs-dev] [RFC PATCH 1/8] brd: use memcpy_from_page() in copy_from_brd() Chaitanya Kulkarni
2021-02-07 19:04 ` Chaitanya Kulkarni [this message]
2021-02-08 4:35 ` [f2fs-dev] [RFC PATCH 2/8] " Ira Weiny
2021-02-08 5:47 ` Chaitanya Kulkarni
2021-02-07 19:04 ` [f2fs-dev] [RFC PATCH 3/8] null_blk: use memcpy_page() in copy_to_nullb() Chaitanya Kulkarni
2021-02-07 19:04 ` [f2fs-dev] [RFC PATCH 4/8] null_blk: use memcpy_page() in copy_from_nullb() Chaitanya Kulkarni
2021-02-07 19:04 ` [f2fs-dev] [RFC PATCH 5/8] ext4: use memcpy_from_page() in pagecache_read() Chaitanya Kulkarni
2021-02-07 19:04 ` [f2fs-dev] [RFC PATCH 6/8] ext4: use memcpy_to_page() in pagecache_write() Chaitanya Kulkarni
2021-03-25 14:22 ` Theodore Ts'o
2021-03-25 15:09 ` Ira Weiny
2021-03-25 15:10 ` Ira Weiny
2021-02-07 19:04 ` [f2fs-dev] [RFC PATCH 7/8] f2fs: use memcpy_from_page() in pagecache_read() Chaitanya Kulkarni
2021-02-07 19:04 ` [f2fs-dev] [RFC PATCH 8/8] f2fs: use memcpy_to_page() in pagecache_write() Chaitanya Kulkarni
2021-02-10 18:01 ` Eric Biggers
2021-02-10 19:41 ` Chaitanya Kulkarni
2021-02-07 19:10 ` [f2fs-dev] [RFC PATCH 0/8] use core page calls instead of kmaps Chaitanya Kulkarni
2021-02-08 4:42 ` Ira Weiny
2021-02-08 5:47 ` Chaitanya Kulkarni
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