[IA64] Perfmon over-initialises its inodes

i_sb and i_sock are both initialised by alloc_inode()
Signed-off-by: Matthew Wilcox <matthew@wil.cx>
Acked-by: Stephane Eranian <eranian@hpl.hp.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>

arch/ia64/kernel/perfmon.c

@@ -2160,9 +2160,7 @@ pfm_alloc_fd(struct file **cfile)
 
 	DPRINT(("new inode ino=%ld @%p\n", inode->i_ino, inode));
 
-	inode->i_sb   = pfmfs_mnt->mnt_sb;
 	inode->i_mode = S_IFCHR|S_IRUGO;
-	inode->i_sock = 0;
 	inode->i_uid  = current->fsuid;
 	inode->i_gid  = current->fsgid;