proc: make struct proc_dir_entry::name a terminal array rather than a pointer

Since __proc_create() appends the name it is given to the end of the PDE
structure that it allocates, there isn't a need to store a name pointer.
Instead we can just replace the name pointer with a terminal char array of
_unspecified_ length.  The compiler will simply append the string to statically
defined variables of PDE type overlapping any hole at the end of the structure
and, unlike specifying an explicitly _zero_ length array, won't give a warning
if you try to statically initialise it with a string of more than zero length.

Also, whilst we're at it:

 (1) Move namelen to end just prior to name and reduce it to a single byte
     (name shouldn't be longer than NAME_MAX).

 (2) Move pde_unload_lock two places further on so that if it's four bytes in
     size on a 64-bit machine, it won't cause an unused hole in the PDE struct.

Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 1 insertions, 1 deletions

diff --git a/fs/proc/root.c b/fs/proc/root.c
index d6c3b416529b..9a8a2b77b874 100644
--- a/fs/proc/root.c
+++ b/fs/proc/root.c
@@ -186,13 +186,13 @@ static const struct inode_operations proc_root_inode_operations = {
 struct proc_dir_entry proc_root = {
         .low_ino        = PROC_ROOT_INO, 
         .namelen        = 5, 
-        .name           = "/proc",
         .mode           = S_IFDIR | S_IRUGO | S_IXUGO, 
         .nlink          = 2, 
         .count          = ATOMIC_INIT(1),
         .proc_iops      = &proc_root_inode_operations, 
         .proc_fops      = &proc_root_operations,
         .parent         = &proc_root,
+        .name           = "/proc",
 };
 
 int pid_ns_prepare_proc(struct pid_namespace *ns)