[PATCH] sysctl: remove insert_at_head from register_sysctl

The semantic effect of insert_at_head is that it would allow new registered
sysctl entries to override existing sysctl entries of the same name.  Which is
pain for caching and the proc interface never implemented.

I have done an audit and discovered that none of the current users of
register_sysctl care as (excpet for directories) they do not register
duplicate sysctl entries.

So this patch simply removes the support for overriding existing entries in
the sys_sysctl interface since no one uses it or cares and it makes future
enhancments harder.

Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Acked-by: Ralf Baechle <ralf@linux-mips.org>
Acked-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Russell King <rmk@arm.linux.org.uk>
Cc: David Howells <dhowells@redhat.com>
Cc: "Luck, Tony" <tony.luck@intel.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Andi Kleen <ak@muc.de>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Corey Minyard <minyard@acm.org>
Cc: Neil Brown <neilb@suse.de>
Cc: "John W. Linville" <linville@tuxdriver.com>
Cc: James Bottomley <James.Bottomley@steeleye.com>
Cc: Jan Kara <jack@ucw.cz>
Cc: Trond Myklebust <trond.myklebust@fys.uio.no>
Cc: Mark Fasheh <mark.fasheh@oracle.com>
Cc: David Chinner <dgc@sgi.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Patrick McHardy <kaber@trash.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 2 insertions, 2 deletions

diff --git a/net/ipv4/devinet.c b/net/ipv4/devinet.c
index 52db485a88f3..bf3eb2dc7662 100644
--- a/net/ipv4/devinet.c
+++ b/net/ipv4/devinet.c
@@ -1606,7 +1606,7 @@ static void devinet_sysctl_register(struct in_device *in_dev,
         t->devinet_root_dir[0].child  = t->devinet_proto_dir;
         t->devinet_root_dir[0].de     = NULL;
 
-        t->sysctl_header = register_sysctl_table(t->devinet_root_dir, 0);
+        t->sysctl_header = register_sysctl_table(t->devinet_root_dir);
         if (!t->sysctl_header)
             goto free_procname;
 
@@ -1640,7 +1640,7 @@ void __init devinet_init(void)
         rtnetlink_links[PF_INET] = inet_rtnetlink_table;
 #ifdef CONFIG_SYSCTL
         devinet_sysctl.sysctl_header =
-                register_sysctl_table(devinet_sysctl.devinet_root_dir, 0);
+                register_sysctl_table(devinet_sysctl.devinet_root_dir);
         devinet_sysctl_register(NULL, &ipv4_devconf_dflt);
 #endif
 }