diff options
author | Eric W. Biederman <ebiederm@xmission.com> | 2009-11-16 05:40:01 -0500 |
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committer | Eric W. Biederman <ebiederm@xmission.com> | 2009-11-18 11:14:55 -0500 |
commit | 86926d0096279b9739ceeff40f68d3c33b9119a9 (patch) | |
tree | 94e51fdbe6e04e41c3fa1d5a28504fd5a33849ff /Documentation | |
parent | 60a0a52df149286a25fddf9b2d0cfe77cf0bc516 (diff) |
sysctl: Remove CTL_NONE and CTL_UNNUMBERED
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@xmission.com>
Diffstat (limited to 'Documentation')
-rw-r--r-- | Documentation/sysctl/ctl_unnumbered.txt | 22 |
1 files changed, 0 insertions, 22 deletions
diff --git a/Documentation/sysctl/ctl_unnumbered.txt b/Documentation/sysctl/ctl_unnumbered.txt deleted file mode 100644 index 23003a8ea3e7..000000000000 --- a/Documentation/sysctl/ctl_unnumbered.txt +++ /dev/null | |||
@@ -1,22 +0,0 @@ | |||
1 | |||
2 | Except for a few extremely rare exceptions user space applications do not use | ||
3 | the binary sysctl interface. Instead everyone uses /proc/sys/... with | ||
4 | readable ascii names. | ||
5 | |||
6 | Recently the kernel has started supporting setting the binary sysctl value to | ||
7 | CTL_UNNUMBERED so we no longer need to assign a binary sysctl path to allow | ||
8 | sysctls to show up in /proc/sys. | ||
9 | |||
10 | Assigning binary sysctl numbers is an endless source of conflicts in sysctl.h, | ||
11 | breaking of the user space ABI (because of those conflicts), and maintenance | ||
12 | problems. A complete pass through all of the sysctl users revealed multiple | ||
13 | instances where the sysctl binary interface was broken and had gone undetected | ||
14 | for years. | ||
15 | |||
16 | So please do not add new binary sysctl numbers. They are unneeded and | ||
17 | problematic. | ||
18 | |||
19 | If you really need a new binary sysctl number please first merge your sysctl | ||
20 | into the kernel and then as a separate patch allocate a binary sysctl number. | ||
21 | |||
22 | (ebiederm@xmission.com, June 2007) | ||