From: Andrew Morton <akpm@linux-foundation.org>
To: akpm@linux-foundation.org, chaitanya.kulkarni@wdc.com,
hch@lst.de, ira.weiny@intel.com, linux-mm@kvack.org,
mm-commits@vger.kernel.org, torvalds@linux-foundation.org
Subject: [patch 07/15] mm: use kmap_local_page in memzero_page
Date: Fri, 23 Jul 2021 15:50:20 -0700 [thread overview]
Message-ID: <20210723225020.fbnIBOjkH%akpm@linux-foundation.org> (raw)
In-Reply-To: <20210723154926.c6cda0f262b1990b950a5886@linux-foundation.org>
From: Christoph Hellwig <hch@lst.de>
Subject: mm: use kmap_local_page in memzero_page
The commit message introducing the global memzero_page explicitly mentions
switching to kmap_local_page in the commit log but doesn't actually do
that.
Link: https://lkml.kernel.org/r/20210713055231.137602-3-hch@lst.de
Fixes: 28961998f858 ("iov_iter: lift memzero_page() to highmem.h")
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Reviewed-by: Ira Weiny <ira.weiny@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---
include/linux/highmem.h | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
--- a/include/linux/highmem.h~mm-use-kmap_local_page-in-memzero_page
+++ a/include/linux/highmem.h
@@ -324,10 +324,10 @@ static inline void memcpy_to_page(struct
static inline void memzero_page(struct page *page, size_t offset, size_t len)
{
- char *addr = kmap_atomic(page);
+ char *addr = kmap_local_page(page);
memset(addr + offset, 0, len);
flush_dcache_page(page);
- kunmap_atomic(addr);
+ kunmap_local(addr);
}
#endif /* _LINUX_HIGHMEM_H */
_
next prev parent reply other threads:[~2021-07-23 22:50 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-07-23 22:49 incoming Andrew Morton
2021-07-23 22:50 ` [patch 01/15] userfaultfd: do not untag user pointers Andrew Morton
2021-07-23 22:50 ` [patch 02/15] selftest: use mmap instead of posix_memalign to allocate memory Andrew Morton
2021-07-23 22:50 ` [patch 03/15] kfence: defer kfence_test_init to ensure that kunit debugfs is created Andrew Morton
2021-07-23 22:50 ` [patch 04/15] kfence: move the size check to the beginning of __kfence_alloc() Andrew Morton
2021-07-23 22:50 ` [patch 05/15] kfence: skip all GFP_ZONEMASK allocations Andrew Morton
2021-07-23 22:50 ` [patch 06/15] mm: call flush_dcache_page() in memcpy_to_page() and memzero_page() Andrew Morton
2021-07-24 6:59 ` Christoph Hellwig
2021-07-24 16:23 ` Matthew Wilcox
2021-07-23 22:50 ` Andrew Morton [this message]
2021-07-23 22:50 ` [patch 08/15] mm: page_alloc: fix page_poison=1 / INIT_ON_ALLOC_DEFAULT_ON interaction Andrew Morton
2021-07-23 22:50 ` [patch 09/15] memblock: make for_each_mem_range() traverse MEMBLOCK_HOTPLUG regions Andrew Morton
2021-07-23 22:50 ` [patch 10/15] writeback, cgroup: remove wb from offline list before releasing refcnt Andrew Morton
2021-07-23 22:50 ` [patch 11/15] writeback, cgroup: do not reparent dax inodes Andrew Morton
2021-07-23 22:50 ` [patch 12/15] mm/secretmem: wire up ->set_page_dirty Andrew Morton
2021-07-23 22:50 ` [patch 13/15] mm: mmap_lock: fix disabling preemption directly Andrew Morton
2021-07-23 22:50 ` [patch 14/15] mm: fix the deadlock in finish_fault() Andrew Morton
2021-07-23 22:50 ` [patch 15/15] hugetlbfs: fix mount mode command line processing Andrew Morton
2021-07-24 1:41 ` Al Viro
2021-07-26 5:22 ` Andrew Morton
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20210723225020.fbnIBOjkH%akpm@linux-foundation.org \
--to=akpm@linux-foundation.org \
--cc=chaitanya.kulkarni@wdc.com \
--cc=hch@lst.de \
--cc=ira.weiny@intel.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mm@kvack.org \
--cc=mm-commits@vger.kernel.org \
--cc=torvalds@linux-foundation.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).