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From: Eric W. Biederman on 18 Nov 2009 11:50
From: Eric W. Biederman <ebiederm(a)xmission.com>

Now that the sysctl structures no longer have a ctl_name field
there is no reason to retain the definitions for CTL_NONE and
CTL_UNNUMBERED, or to explain their historic usage.

Signed-off-by: Eric W. Biederman <ebiederm(a)xmission.com>
---
Documentation/sysctl/ctl_unnumbered.txt | 22 ----------------------
include/linux/sysctl.h | 9 ---------
2 files changed, 0 insertions(+), 31 deletions(-)
delete mode 100644 Documentation/sysctl/ctl_unnumbered.txt

diff --git a/Documentation/sysctl/ctl_unnumbered.txt b/Documentation/sysctl/ctl_unnumbered.txt
deleted file mode 100644
index 23003a8..0000000
--- a/Documentation/sysctl/ctl_unnumbered.txt
+++ /dev/null
@@ -1,22 +0,0 @@
-
-Except for a few extremely rare exceptions user space applications do not use
-the binary sysctl interface. Instead everyone uses /proc/sys/... with
-readable ascii names.
-
-Recently the kernel has started supporting setting the binary sysctl value to
-CTL_UNNUMBERED so we no longer need to assign a binary sysctl path to allow
-sysctls to show up in /proc/sys.
-
-Assigning binary sysctl numbers is an endless source of conflicts in sysctl.h,
-breaking of the user space ABI (because of those conflicts), and maintenance
-problems. A complete pass through all of the sysctl users revealed multiple
-instances where the sysctl binary interface was broken and had gone undetected
-for years.
-
-So please do not add new binary sysctl numbers. They are unneeded and
-problematic.
-
-If you really need a new binary sysctl number please first merge your sysctl
-into the kernel and then as a separate patch allocate a binary sysctl number.
-
-(ebiederm(a)xmission.com, June 2007)
diff --git a/include/linux/sysctl.h b/include/linux/sysctl.h
index b4f6adc..c83a86a 100644
--- a/include/linux/sysctl.h
+++ b/include/linux/sysctl.h
@@ -15,9 +15,6 @@
** The kernel will then return -ENOTDIR to any application using
** the old binary interface.
**
- ** For new interfaces unless you really need a binary number
- ** please use CTL_UNNUMBERED.
- **
****************************************************************
****************************************************************
*/
@@ -50,12 +47,6 @@ struct __sysctl_args {

/* Top-level names: */

-/* For internal pattern-matching use only: */
-#ifdef __KERNEL__
-#define CTL_NONE 0
-#define CTL_UNNUMBERED CTL_NONE /* sysctl without a binary number */
-#endif
-
enum
{
CTL_KERN=1, /* General kernel info and control */
--
1.6.5.2.143.g8cc62

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Prev: perf_events: improve Intel event scheduling
Next: jump label v3 - x86: Introduce generic jump patching without stop_machine