| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening PHC | |
|
Open Source and information security mailing list archives
| ||
|
Date: Fri, 9 Oct 2020 12:50:08 -0700
From: ira.weiny@...el.com
To: Andrew Morton <akpm@...ux-foundation.org>,
Thomas Gleixner <tglx@...utronix.de>,
Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
Andy Lutomirski <luto@...nel.org>,
Peter Zijlstra <peterz@...radead.org>
Cc: Ira Weiny <ira.weiny@...el.com>, Nicolas Pitre <nico@...xnic.net>,
x86@...nel.org, Dave Hansen <dave.hansen@...ux.intel.com>,
Dan Williams <dan.j.williams@...el.com>,
Fenghua Yu <fenghua.yu@...el.com>, linux-doc@...r.kernel.org,
linux-kernel@...r.kernel.org, linux-nvdimm@...ts.01.org,
linux-fsdevel@...r.kernel.org, linux-mm@...ck.org,
linux-kselftest@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org,
kvm@...r.kernel.org, netdev@...r.kernel.org, bpf@...r.kernel.org,
kexec@...ts.infradead.org, linux-bcache@...r.kernel.org,
linux-mtd@...ts.infradead.org, devel@...verdev.osuosl.org,
linux-efi@...r.kernel.org, linux-mmc@...r.kernel.org,
linux-scsi@...r.kernel.org, target-devel@...r.kernel.org,
linux-nfs@...r.kernel.org, ceph-devel@...r.kernel.org,
linux-ext4@...r.kernel.org, linux-aio@...ck.org,
io-uring@...r.kernel.org, linux-erofs@...ts.ozlabs.org,
linux-um@...ts.infradead.org, linux-ntfs-dev@...ts.sourceforge.net,
reiserfs-devel@...r.kernel.org,
linux-f2fs-devel@...ts.sourceforge.net,
linux-nilfs@...r.kernel.org, cluster-devel@...hat.com,
ecryptfs@...r.kernel.org, linux-cifs@...r.kernel.org,
linux-btrfs@...r.kernel.org, linux-afs@...ts.infradead.org,
linux-rdma@...r.kernel.org, amd-gfx@...ts.freedesktop.org,
dri-devel@...ts.freedesktop.org, intel-gfx@...ts.freedesktop.org,
drbd-dev@...ts.linbit.com, linux-block@...r.kernel.org,
xen-devel@...ts.xenproject.org, linux-cachefs@...hat.com,
samba-technical@...ts.samba.org, intel-wired-lan@...ts.osuosl.org
Subject: [PATCH RFC PKS/PMEM 33/58] fs/cramfs: Utilize new kmap_thread()
From: Ira Weiny <ira.weiny@...el.com>
The kmap() calls in this FS are localized to a single thread. To avoid
the over head of global PKRS updates use the new kmap_thread() call.
Cc: Nicolas Pitre <nico@...xnic.net>
Signed-off-by: Ira Weiny <ira.weiny@...el.com>
---
fs/cramfs/inode.c | 10 +++++-----
1 file changed, 5 insertions(+), 5 deletions(-)
diff --git a/fs/cramfs/inode.c b/fs/cramfs/inode.c
index 912308600d39..003c014a42ed 100644
--- a/fs/cramfs/inode.c
+++ b/fs/cramfs/inode.c
@@ -247,8 +247,8 @@ static void *cramfs_blkdev_read(struct super_block *sb, unsigned int offset,
struct page *page = pages[i];
if (page) {
- memcpy(data, kmap(page), PAGE_SIZE);
- kunmap(page);
+ memcpy(data, kmap_thread(page), PAGE_SIZE);
+ kunmap_thread(page);
put_page(page);
} else
memset(data, 0, PAGE_SIZE);
@@ -826,7 +826,7 @@ static int cramfs_readpage(struct file *file, struct page *page)
maxblock = (inode->i_size + PAGE_SIZE - 1) >> PAGE_SHIFT;
bytes_filled = 0;
- pgdata = kmap(page);
+ pgdata = kmap_thread(page);
if (page->index < maxblock) {
struct super_block *sb = inode->i_sb;
@@ -914,13 +914,13 @@ static int cramfs_readpage(struct file *file, struct page *page)
memset(pgdata + bytes_filled, 0, PAGE_SIZE - bytes_filled);
flush_dcache_page(page);
- kunmap(page);
+ kunmap_thread(page);
SetPageUptodate(page);
unlock_page(page);
return 0;
err:
- kunmap(page);
+ kunmap_thread(page);
ClearPageUptodate(page);
SetPageError(page);
unlock_page(page);
--
2.28.0.rc0.12.gb6a658bd00c9
Powered by blists - more mailing lists