From: Li RongQing <lirongqing@baidu.com>
To: Andrew Morton <akpm@linux-foundation.org>,
Dan Williams <dan.j.williams@intel.com>,
linux-mm@kvack.org, linux-kernel@vger.kernel.org
Cc: Michal Hocko <mhocko@suse.com>,
"Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>,
Matthew Wilcox <mawilcox@microsoft.com>,
Souptick Joarder <jrdr.linux@gmail.com>
Subject: [PATCH] mm: introduce kvvirt_to_page() helper
Date: Thu, 16 Aug 2018 17:17:37 +0800 [thread overview]
Message-ID: <1534411057-26276-1-git-send-email-lirongqing@baidu.com> (raw)
The new helper returns address mapping page, which has several users
in individual subsystem, like mem_to_page in xfs_buf.c and pgv_to_page
in af_packet.c, after this, they can be unified
Signed-off-by: Zhang Yu <zhangyu31@baidu.com>
Signed-off-by: Li RongQing <lirongqing@baidu.com>
---
include/linux/mm.h | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/include/linux/mm.h b/include/linux/mm.h
index 68a5121694ef..bb34a3c71df5 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -599,6 +599,14 @@ static inline void *kvcalloc(size_t n, size_t size, gfp_t flags)
return kvmalloc_array(n, size, flags | __GFP_ZERO);
}
+static inline struct page *kvvirt_to_page(const void *addr)
+{
+ if (!is_vmalloc_addr(addr))
+ return virt_to_page(addr);
+ else
+ return vmalloc_to_page(addr);
+}
+
extern void kvfree(const void *addr);
static inline atomic_t *compound_mapcount_ptr(struct page *page)
--
2.16.2
next reply other threads:[~2018-08-16 9:18 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-08-16 9:17 Li RongQing [this message]
2018-08-16 9:21 ` [PATCH] mm: introduce kvvirt_to_page() helper Michal Hocko
[not found] <1534596541-31393-1-git-send-email-lirongqing@baidu.com>
2018-08-20 14:41 ` Michal Hocko
2018-08-20 14:49 ` Matthew Wilcox
2018-08-20 16:24 ` Michal Hocko
2018-08-20 17:07 ` Matthew Wilcox
2018-08-20 19:15 ` Michal Hocko
2018-08-20 21:53 ` Dave Chinner
2018-08-20 17:38 ` Matthew Wilcox
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=1534411057-26276-1-git-send-email-lirongqing@baidu.com \
--to=lirongqing@baidu.com \
--cc=akpm@linux-foundation.org \
--cc=dan.j.williams@intel.com \
--cc=jrdr.linux@gmail.com \
--cc=kirill.shutemov@linux.intel.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mm@kvack.org \
--cc=mawilcox@microsoft.com \
--cc=mhocko@suse.com \
/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).