[PATCH] ppc32/ppc64: cleanup /proc/device-tree

This cleans up the /proc/device-tree representation of the Open Firmware
device-tree on ppc and ppc64.  It does the following things:

 - Workaround an issue in some Apple device-trees where a property may
   exist with the same name as a child node of the parent.  We now
   simply "drop" the property instead of creating duplicate entries in
   /proc with random result...

 - Do not try to chop off the "@0" at the end of a node name whose unit
   address is 0.  This is not useful, inconsistent, and the code was
   buggy and didn't always work anyway.

 - Do not create symlinks for the short name and unit address parts of a
   node.  These were never really used, bloated the memory footprint of
   the device-tree with useless struct proc_dir_entry and their matching
   dentry and inode cache bloat.

This results in smaller code, smaller memory footprint, and a more
accurate view of the tree presented to userland.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 1 insertions, 12 deletions

diff --git a/include/asm-ppc64/prom.h b/include/asm-ppc64/prom.h
index 2440a2c90ae9..04b1a84f7ca3 100644
--- a/include/asm-ppc64/prom.h
+++ b/include/asm-ppc64/prom.h
@@ -147,9 +147,7 @@ struct device_node {
         struct  device_node *sibling;
         struct  device_node *next;      /* next device of same type */
         struct  device_node *allnext;   /* next in list of all nodes */
-        struct  proc_dir_entry *pde;       /* this node's proc directory */
-        struct  proc_dir_entry *name_link; /* name symlink */
-        struct  proc_dir_entry *addr_link; /* addr symlink */
+        struct  proc_dir_entry *pde;    /* this node's proc directory */
         struct  kref kref;
         unsigned long _flags;
 };
@@ -174,15 +172,6 @@ static inline void set_node_proc_entry(struct device_node *dn, struct proc_dir_e
         dn->pde = de;
 }
 
-static void inline set_node_name_link(struct device_node *dn, struct proc_dir_entry *de)
-{
-        dn->name_link = de;
-}
-
-static void inline set_node_addr_link(struct device_node *dn, struct proc_dir_entry *de)
-{
-        dn->addr_link = de;
-}
 
 /* OBSOLETE: Old stlye node lookup */
 extern struct device_node *find_devices(const char *name);