[PATCH] Replace regular code with appropriate calls to container_of()

Replace a small number of expressions with a call to the "container_of()"
macro.

Signed-off-by: Robert P. J. Day <rpjday@mindspring.com>
Acked-by: Paul Mackerras <paulus@samba.org>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Stephen Smalley <sds@tycho.nsa.gov>
Cc: James Morris <jmorris@namei.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

5 files changed, 6 insertions, 10 deletions

diff --git a/drivers/net/ppp_generic.c b/drivers/net/ppp_generic.c
index c6de566188e4..0986f6c843e6 100644
--- a/drivers/net/ppp_generic.c
+++ b/drivers/net/ppp_generic.c
@@ -83,7 +83,7 @@ struct ppp_file {
         int             dead;           /* unit/channel has been shut down */
 };
 
-#define PF_TO_X(pf, X)          ((X *)((char *)(pf) - offsetof(X, file)))
+#define PF_TO_X(pf, X)          container_of(pf, X, file)
 
 #define PF_TO_PPP(pf)           PF_TO_X(pf, struct ppp)
 #define PF_TO_CHANNEL(pf)       PF_TO_X(pf, struct channel)
diff --git a/drivers/s390/net/lcs.c b/drivers/s390/net/lcs.c
index b97dd15bdb9a..ecca1046714e 100644
--- a/drivers/s390/net/lcs.c
+++ b/drivers/s390/net/lcs.c
@@ -1511,8 +1511,7 @@ lcs_txbuffer_cb(struct lcs_channel *channel, struct lcs_buffer *buffer)
         LCS_DBF_TEXT(5, trace, "txbuffcb");
         /* Put buffer back to pool. */
         lcs_release_buffer(channel, buffer);
-        card = (struct lcs_card *)
-                ((char *) channel - offsetof(struct lcs_card, write));
+        card = container_of(channel, struct lcs_card, write);
         if (netif_queue_stopped(card->dev) && netif_carrier_ok(card->dev))
                 netif_wake_queue(card->dev);
         spin_lock(&card->lock);
@@ -1810,8 +1809,7 @@ lcs_get_frames_cb(struct lcs_channel *channel, struct lcs_buffer *buffer)
                 LCS_DBF_TEXT(4, trace, "-eiogpkt");
                 return;
         }
-        card = (struct lcs_card *)
-                ((char *) channel - offsetof(struct lcs_card, read));
+        card = container_of(channel, struct lcs_card, read);
         offset = 0;
         while (lcs_hdr->offset != 0) {
                 if (lcs_hdr->offset <= 0 ||
diff --git a/drivers/video/sa1100fb.h b/drivers/video/sa1100fb.h
index 0b07f6ae3367..48066ef3af05 100644
--- a/drivers/video/sa1100fb.h
+++ b/drivers/video/sa1100fb.h
@@ -110,9 +110,7 @@ struct sa1100fb_info {
 #endif
 };
 
-#define __type_entry(ptr,type,member) ((type *)((char *)(ptr)-offsetof(type,member)))
-
-#define TO_INF(ptr,member)      __type_entry(ptr,struct sa1100fb_info,member)
+#define TO_INF(ptr,member)      container_of(ptr,struct sa1100fb_info,member)
 
 #define SA1100_PALETTE_MODE_VAL(bpp)    (((bpp) & 0x018) << 9)
 
diff --git a/include/linux/security.h b/include/linux/security.h
index 83cdefae9931..c554f60f18e4 100644
--- a/include/linux/security.h
+++ b/include/linux/security.h
@@ -492,7 +492,7 @@ struct request_sock;
  *      Note that the fown_struct, @fown, is never outside the context of a
  *      struct file, so the file structure (and associated security information)
  *      can always be obtained:
- *              (struct file *)((long)fown - offsetof(struct file,f_owner));
+ *              container_of(fown, struct file, f_owner)
  *      @tsk contains the structure of task receiving signal.
  *      @fown contains the file owner information.
  *      @sig is the signal that will be sent.  When 0, kernel sends SIGIO.
diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c
index 9eeab82719a2..35eb8de892fc 100644
--- a/security/selinux/hooks.c
+++ b/security/selinux/hooks.c
@@ -2654,7 +2654,7 @@ static int selinux_file_send_sigiotask(struct task_struct *tsk,
         struct file_security_struct *fsec;
 
         /* struct fown_struct is never outside the context of a struct file */
-        file = (struct file *)((long)fown - offsetof(struct file,f_owner));
+        file = container_of(fown, struct file, f_owner);
 
         tsec = tsk->security;
         fsec = file->f_security;