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
 
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Date:   Fri,  9 Oct 2020 12:50:11 -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>, Jan Kara <jack@...e.com>,
        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 36/58] fs/ext2: Use ext2_put_page

From: Ira Weiny <ira.weiny@...el.com>

There are 3 places in namei.c where the equivalent of ext2_put_page() is
open coded.  We want to use k[un]map_thread() instead of k[un]map() in
ext2_[get|put]_page().

Move ext2_put_page() to ext2.h and use it in namei.c in prep for
converting the k[un]map() code.

Cc: Jan Kara <jack@...e.com>
Signed-off-by: Ira Weiny <ira.weiny@...el.com>
---
 fs/ext2/dir.c   |  6 ------
 fs/ext2/ext2.h  |  8 ++++++++
 fs/ext2/namei.c | 15 +++++----------
 3 files changed, 13 insertions(+), 16 deletions(-)

diff --git a/fs/ext2/dir.c b/fs/ext2/dir.c
index 70355ab6740e..f3194bf20733 100644
--- a/fs/ext2/dir.c
+++ b/fs/ext2/dir.c
@@ -66,12 +66,6 @@ static inline unsigned ext2_chunk_size(struct inode *inode)
 	return inode->i_sb->s_blocksize;
 }
 
-static inline void ext2_put_page(struct page *page)
-{
-	kunmap(page);
-	put_page(page);
-}
-
 /*
  * Return the offset into page `page_nr' of the last valid
  * byte in that page, plus one.
diff --git a/fs/ext2/ext2.h b/fs/ext2/ext2.h
index 5136b7289e8d..021ec8b42ac3 100644
--- a/fs/ext2/ext2.h
+++ b/fs/ext2/ext2.h
@@ -16,6 +16,8 @@
 #include <linux/blockgroup_lock.h>
 #include <linux/percpu_counter.h>
 #include <linux/rbtree.h>
+#include <linux/mm.h>
+#include <linux/highmem.h>
 
 /* XXX Here for now... not interested in restructing headers JUST now */
 
@@ -745,6 +747,12 @@ extern int ext2_delete_entry (struct ext2_dir_entry_2 *, struct page *);
 extern int ext2_empty_dir (struct inode *);
 extern struct ext2_dir_entry_2 * ext2_dotdot (struct inode *, struct page **);
 extern void ext2_set_link(struct inode *, struct ext2_dir_entry_2 *, struct page *, struct inode *, int);
+static inline void ext2_put_page(struct page *page)
+{
+	kunmap(page);
+	put_page(page);
+}
+
 
 /* ialloc.c */
 extern struct inode * ext2_new_inode (struct inode *, umode_t, const struct qstr *);
diff --git a/fs/ext2/namei.c b/fs/ext2/namei.c
index 5bf2c145643b..ea980f1e2e99 100644
--- a/fs/ext2/namei.c
+++ b/fs/ext2/namei.c
@@ -389,23 +389,18 @@ static int ext2_rename (struct inode * old_dir, struct dentry * old_dentry,
 	if (dir_de) {
 		if (old_dir != new_dir)
 			ext2_set_link(old_inode, dir_de, dir_page, new_dir, 0);
-		else {
-			kunmap(dir_page);
-			put_page(dir_page);
-		}
+		else
+			ext2_put_page(dir_page);
 		inode_dec_link_count(old_dir);
 	}
 	return 0;
 
 
 out_dir:
-	if (dir_de) {
-		kunmap(dir_page);
-		put_page(dir_page);
-	}
+	if (dir_de)
+		ext2_put_page(dir_page);
 out_old:
-	kunmap(old_page);
-	put_page(old_page);
+	ext2_put_page(old_page);
 out:
 	return err;
 }
-- 
2.28.0.rc0.12.gb6a658bd00c9

Powered by blists - more mailing lists