Fix f_version type: should be u64 instead of unsigned long

Fix f_version type: should be u64 instead of long

There is a type inconsistency between struct inode i_version and struct file
f_version.

fs.h:

struct inode
  u64                     i_version;

and

struct file
  unsigned long           f_version;

Users do:

fs/ext3/dir.c:

if (filp->f_version != inode->i_version) {

So why isn't f_version a u64 ? It becomes a problem if versions gets
higher than 2^32 and we are on an architecture where longs are 32 bits.

This patch changes the f_version type to u64, and updates the users accordingly.

It applies to 2.6.23-rc2-mm2.

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
Cc: Martin Bligh <mbligh@google.com>
Cc: "Randy.Dunlap" <rdunlap@xenotime.net>
Cc: Al Viro <viro@ftp.linux.org.uk>
Cc: <linux-ext4@vger.kernel.org>
Cc: Mark Fasheh <mark.fasheh@oracle.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: "J. Bruce Fields" <bfields@fieldses.org>
Cc: Trond Myklebust <trond.myklebust@fys.uio.no>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

4 files changed, 9 insertions, 9 deletions

diff --git a/fs/ext3/dir.c b/fs/ext3/dir.c
index c2c3491b18cf..fd4b6dd71150 100644
--- a/fs/ext3/dir.c
+++ b/fs/ext3/dir.c
@@ -210,7 +210,7 @@ revalidate:
                                  * not the directory has been modified
                                  * during the copy operation.
                                  */
-                                unsigned long version = filp->f_version;
+                                u64 version = filp->f_version;
 
                                 error = filldir(dirent, de->name,
                                                 de->name_len,
diff --git a/fs/ext4/dir.c b/fs/ext4/dir.c
index e11890acfa21..0fb1e62b20d0 100644
--- a/fs/ext4/dir.c
+++ b/fs/ext4/dir.c
@@ -210,7 +210,7 @@ revalidate:
                                  * not the directory has been modified
                                  * during the copy operation.
                                  */
-                                unsigned long version = filp->f_version;
+                                u64 version = filp->f_version;
 
                                 error = filldir(dirent, de->name,
                                                 de->name_len,
diff --git a/fs/ocfs2/dir.c b/fs/ocfs2/dir.c
index 7453b70c1a19..6a2f143e269c 100644
--- a/fs/ocfs2/dir.c
+++ b/fs/ocfs2/dir.c
@@ -586,7 +586,7 @@ bail:
 }
 
 static int ocfs2_dir_foreach_blk_id(struct inode *inode,
-                                    unsigned long *f_version,
+                                    u64 *f_version,
                                     loff_t *f_pos, void *priv,
                                     filldir_t filldir, int *filldir_err)
 {
@@ -648,7 +648,7 @@ revalidate:
                          * not the directory has been modified
                          * during the copy operation.
                          */
-                        unsigned long version = *f_version;
+                        u64 version = *f_version;
                         unsigned char d_type = DT_UNKNOWN;
 
                         if (de->file_type < OCFS2_FT_MAX)
@@ -677,7 +677,7 @@ out:
 }
 
 static int ocfs2_dir_foreach_blk_el(struct inode *inode,
-                                    unsigned long *f_version,
+                                    u64 *f_version,
                                     loff_t *f_pos, void *priv,
                                     filldir_t filldir, int *filldir_err)
 {
@@ -798,7 +798,7 @@ out:
         return stored;
 }
 
-static int ocfs2_dir_foreach_blk(struct inode *inode, unsigned long *f_version,
+static int ocfs2_dir_foreach_blk(struct inode *inode, u64 *f_version,
                                  loff_t *f_pos, void *priv, filldir_t filldir,
                                  int *filldir_err)
 {
@@ -818,7 +818,7 @@ int ocfs2_dir_foreach(struct inode *inode, loff_t *f_pos, void *priv,
                       filldir_t filldir)
 {
         int ret = 0, filldir_err = 0;
-        unsigned long version = inode->i_version;
+        u64 version = inode->i_version;
 
         while (*f_pos < i_size_read(inode)) {
                 ret = ocfs2_dir_foreach_blk(inode, &version, f_pos, priv,
diff --git a/fs/proc/base.c b/fs/proc/base.c
index 78fdfea1a7f8..ea115d4c9f59 100644
--- a/fs/proc/base.c
+++ b/fs/proc/base.c
@@ -2586,7 +2586,7 @@ static int proc_task_readdir(struct file * filp, void * dirent, filldir_t filldi
         /* f_version caches the tgid value that the last readdir call couldn't
          * return. lseek aka telldir automagically resets f_version to 0.
          */
-        tid = filp->f_version;
+        tid = (int)filp->f_version;
         filp->f_version = 0;
         for (task = first_tid(leader, tid, pos - 2);
              task;
@@ -2595,7 +2595,7 @@ static int proc_task_readdir(struct file * filp, void * dirent, filldir_t filldi
                 if (proc_task_fill_cache(filp, dirent, filldir, task, tid) < 0) {
                         /* returning this tgid failed, save it as the first
                          * pid for the next readir call */
-                        filp->f_version = tid;
+                        filp->f_version = (u64)tid;
                         put_task_struct(task);
                         break;
                 }