From: Vivek Goyal <vgoyal@redhat.com>
To: linux-fsdevel@vger.kernel.org, linux-nvdimm@lists.01.org,
hch@infradead.org, dan.j.williams@intel.com
Cc: david@fromorbit.com, dm-devel@redhat.com,
linux-s390@vger.kernel.org,
Gerald Schaefer <gerald.schaefer@de.ibm.com>
Subject: [PATCH v6 3/6] s390,dcssblk,dax: Add dax zero_page_range operation to dcssblk driver
Date: Fri, 28 Feb 2020 11:34:53 -0500 [thread overview]
Message-ID: <20200228163456.1587-4-vgoyal@redhat.com> (raw)
In-Reply-To: <20200228163456.1587-1-vgoyal@redhat.com>
Add dax operation zero_page_range for dcssblk driver.
CC: linux-s390@vger.kernel.org
Suggested-by: Christoph Hellwig <hch@infradead.org>
Reviewed-by: Gerald Schaefer <gerald.schaefer@de.ibm.com>
Signed-off-by: Vivek Goyal <vgoyal@redhat.com>
---
drivers/s390/block/dcssblk.c | 15 +++++++++++++++
1 file changed, 15 insertions(+)
diff --git a/drivers/s390/block/dcssblk.c b/drivers/s390/block/dcssblk.c
index 63502ca537eb..ab3e2898816c 100644
--- a/drivers/s390/block/dcssblk.c
+++ b/drivers/s390/block/dcssblk.c
@@ -57,11 +57,26 @@ static size_t dcssblk_dax_copy_to_iter(struct dax_device *dax_dev,
return copy_to_iter(addr, bytes, i);
}
+static int dcssblk_dax_zero_page_range(struct dax_device *dax_dev,
+ pgoff_t pgoff, size_t nr_pages)
+{
+ long rc;
+ void *kaddr;
+
+ rc = dax_direct_access(dax_dev, pgoff, nr_pages, &kaddr, NULL);
+ if (rc < 0)
+ return rc;
+ memset(kaddr, 0, nr_pages << PAGE_SHIFT);
+ dax_flush(dax_dev, kaddr, nr_pages << PAGE_SHIFT);
+ return 0;
+}
+
static const struct dax_operations dcssblk_dax_ops = {
.direct_access = dcssblk_dax_direct_access,
.dax_supported = generic_fsdax_supported,
.copy_from_iter = dcssblk_dax_copy_from_iter,
.copy_to_iter = dcssblk_dax_copy_to_iter,
+ .zero_page_range = dcssblk_dax_zero_page_range,
};
struct dcssblk_dev_info {
--
2.20.1
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next prev parent reply other threads:[~2020-02-28 16:35 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-02-28 16:34 [PATCH v6 0/6] dax/pmem: Provide a dax operation to zero page range Vivek Goyal
2020-02-28 16:34 ` [PATCH v6 1/6] pmem: Add functions for reading/writing page to/from pmem Vivek Goyal
2020-02-29 8:04 ` Pankaj Gupta
2020-03-04 16:16 ` Christoph Hellwig
2020-03-04 18:44 ` Vivek Goyal
2020-02-28 16:34 ` [PATCH v6 2/6] dax, pmem: Add a dax operation zero_page_range Vivek Goyal
2020-02-29 9:21 ` Pankaj Gupta
2020-02-28 16:34 ` Vivek Goyal [this message]
2020-02-28 16:34 ` [PATCH v6 4/6] dm,dax: Add dax zero_page_range operation Vivek Goyal
2020-03-31 19:34 ` Dan Williams
2020-04-03 0:49 ` Dan Williams
2020-04-03 1:02 ` Mike Snitzer
2020-02-28 16:34 ` [PATCH v6 5/6] dax: Use new dax zero page method for zeroing a page Vivek Goyal
2020-02-28 16:34 ` [PATCH v6 6/6] dax,iomap: Add helper dax_iomap_zero() to zero a range Vivek Goyal
2020-02-29 9:16 ` [PATCH v6 0/6] dax/pmem: Provide a dax operation to zero page range Pankaj Gupta
2020-03-10 12:18 ` Vivek Goyal
2020-04-01 16:11 ` [PATCH v6 7/6] dax: Move mandatory ->zero_page_range() check in alloc_dax() Vivek Goyal
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