From: ira.weiny@intel.com
To: Andrew Morton <akpm@linux-foundation.org>
Cc: "Ira Weiny" <ira.weiny@intel.com>,
"Kirti Wankhede" <kwankhede@nvidia.com>,
"Thomas Gleixner" <tglx@linutronix.de>,
"Dave Hansen" <dave.hansen@intel.com>,
"Matthew Wilcox" <willy@infradead.org>,
"Christoph Hellwig" <hch@infradead.org>,
"Dan Williams" <dan.j.williams@intel.com>,
"Al Viro" <viro@zeniv.linux.org.uk>,
"Eric Biggers" <ebiggers@kernel.org>,
"Luis Chamberlain" <mcgrof@kernel.org>,
"Patrik Jakobsson" <patrik.r.jakobsson@gmail.com>,
"Jani Nikula" <jani.nikula@linux.intel.com>,
"Joonas Lahtinen" <joonas.lahtinen@linux.intel.com>,
"Rodrigo Vivi" <rodrigo.vivi@intel.com>,
"David Howells" <dhowells@redhat.com>, "Chris Mason" <clm@fb.com>,
"Josef Bacik" <josef@toxicpanda.com>,
"David Sterba" <dsterba@suse.com>,
"Steve French" <sfrench@samba.org>,
"Jaegeuk Kim" <jaegeuk@kernel.org>,
"Chao Yu" <yuchao0@huawei.com>,
"Nicolas Pitre" <nico@fluxnic.net>,
"Martin K. Petersen" <martin.petersen@oracle.com>,
"Brian King" <brking@us.ibm.com>,
"Greg Kroah-Hartman" <gregkh@linuxfoundation.org>,
"Alexei Starovoitov" <ast@kernel.org>,
"Daniel Borkmann" <daniel@iogearbox.net>,
"Jérôme Glisse" <jglisse@redhat.com>,
linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org
Subject: [PATCH 17/17] samples: Use memcpy_to/from_page()
Date: Mon, 23 Nov 2020 22:07:55 -0800 [thread overview]
Message-ID: <20201124060755.1405602-18-ira.weiny@intel.com> (raw)
In-Reply-To: <20201124060755.1405602-1-ira.weiny@intel.com>
From: Ira Weiny <ira.weiny@intel.com>
Remove kmap/mem*()/kunmap pattern and use memcpy_to/from_page()
Cc: Kirti Wankhede <kwankhede@nvidia.com>
Signed-off-by: Ira Weiny <ira.weiny@intel.com>
---
samples/vfio-mdev/mbochs.c | 8 +++-----
1 file changed, 3 insertions(+), 5 deletions(-)
diff --git a/samples/vfio-mdev/mbochs.c b/samples/vfio-mdev/mbochs.c
index e03068917273..54fe04f63c66 100644
--- a/samples/vfio-mdev/mbochs.c
+++ b/samples/vfio-mdev/mbochs.c
@@ -30,6 +30,7 @@
#include <linux/iommu.h>
#include <linux/sysfs.h>
#include <linux/mdev.h>
+#include <linux/pagemap.h>
#include <linux/pci.h>
#include <linux/dma-buf.h>
#include <linux/highmem.h>
@@ -442,7 +443,6 @@ static ssize_t mdev_access(struct mdev_device *mdev, char *buf, size_t count,
struct device *dev = mdev_dev(mdev);
struct page *pg;
loff_t poff;
- char *map;
int ret = 0;
mutex_lock(&mdev_state->ops_lock);
@@ -479,12 +479,10 @@ static ssize_t mdev_access(struct mdev_device *mdev, char *buf, size_t count,
pos -= MBOCHS_MMIO_BAR_OFFSET;
poff = pos & ~PAGE_MASK;
pg = __mbochs_get_page(mdev_state, pos >> PAGE_SHIFT);
- map = kmap(pg);
if (is_write)
- memcpy(map + poff, buf, count);
+ memcpy_to_page(pg, poff, buf, count);
else
- memcpy(buf, map + poff, count);
- kunmap(pg);
+ memcpy_from_page(buf, pg, poff, count);
put_page(pg);
} else {
--
2.28.0.rc0.12.gb6a658bd00c9
next prev parent reply other threads:[~2020-11-24 6:08 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-11-24 6:07 [PATCH 00/17] kmap: Create mem*_page interfaces ira.weiny
2020-11-24 6:07 ` [PATCH 01/17] mm/highmem: Lift memcpy_[to|from]_page and memset_page to core ira.weiny
2020-11-24 14:19 ` Matthew Wilcox
2020-11-24 19:21 ` Ira Weiny
2020-11-24 20:20 ` Matthew Wilcox
[not found] ` <160648238432.10416.12405581766428273347@jlahtine-mobl.ger.corp.intel.com>
2020-11-27 13:20 ` Matthew Wilcox
[not found] ` <160672815223.3453.2374529656870007787@jlahtine-mobl.ger.corp.intel.com>
2020-12-03 18:25 ` Ira Weiny
2020-11-24 6:07 ` [PATCH 02/17] drivers/firmware_loader: Use new memcpy_[to|from]_page() ira.weiny
2020-11-24 6:07 ` [PATCH 03/17] drivers/gpu: Convert to mem*_page() ira.weiny
[not found] ` <160648211578.10416.3269409785516897908@jlahtine-mobl.ger.corp.intel.com>
2020-12-04 16:05 ` Ira Weiny
2020-12-04 22:33 ` Thomas Gleixner
2020-12-07 6:46 ` Ira Weiny
2020-12-07 16:19 ` Thomas Gleixner
2020-11-24 6:07 ` [PATCH 04/17] fs/afs: Convert to memzero_page() ira.weiny
2020-11-24 6:07 ` [PATCH 05/17] fs/btrfs: " ira.weiny
2020-11-24 14:12 ` David Sterba
2020-11-24 19:25 ` Ira Weiny
2020-11-24 6:07 ` [PATCH 06/17] fs/hfs: Convert to mem*_page() interface ira.weiny
2020-11-24 6:07 ` [PATCH 07/17] fs/cifs: Convert to memcpy_page() ira.weiny
2020-11-24 6:07 ` [PATCH 08/17] fs/hfsplus: Convert to mem*_page() ira.weiny
2020-11-24 6:07 ` [PATCH 09/17] fs/f2fs: Remove f2fs_copy_page() ira.weiny
2020-11-25 3:27 ` Chao Yu
2020-11-24 6:07 ` [PATCH 10/17] fs/freevxfs: Use memcpy_to_page() ira.weiny
2020-11-24 6:07 ` [PATCH 11/17] fs/reiserfs: Use memcpy_from_page() ira.weiny
2020-11-24 6:07 ` [PATCH 12/17] fs/cramfs: " ira.weiny
2020-11-24 15:20 ` Nicolas Pitre
2020-11-24 6:07 ` [PATCH 13/17] drivers/target: Convert to mem*_page() ira.weiny
2020-11-24 6:07 ` [PATCH 14/17] drivers/scsi: Use memcpy_to_page() ira.weiny
2020-11-24 6:07 ` [PATCH 15/17] drivers/staging: Use memcpy_to/from_page() ira.weiny
2020-11-24 6:07 ` [PATCH 16/17] lib: Use mempcy_to/from_page() ira.weiny
2020-11-24 6:07 ` ira.weiny [this message]
2020-12-04 10:18 ` [PATCH 04/17] fs/afs: Convert to memzero_page() David Howells
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