The patch titled
sysctl: Undeprecate sys_sysctl
has been added to the -mm tree. Its filename is
sysctl-undeprecate-sys_sysctl.patch
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: sysctl: Undeprecate sys_sysctl
From: Eric W. Biederman <ebiederm@xxxxxxxxxxxx>
The basic issue is that despite have been deprecated and warned about as a
very bad thing in the man pages since its inception there are a few real
users of sys_sysctl. It was my assumption that because sysctl had been
deprecated for all of 2.6 there would be no user space users by this point,
so I initially gave sys_sysctl a very short deprecation period.
Now that I know there are a few real users the only sane way to proceed
with deprecation is to push the time limit out to a year or two work and
work with distributions that have big testing pools like fedora core to
find these last remaining users.
Which means that the sys_sysctl interface needs to be maintained in the
meantime.
Since I have provided a technical measure that allows us to add new sysctl
entries without reserving more binary numbers I believe that is enough to
fix the sys_sysctl binary interface maintenance problems, because there is
no longer a need to change the binary interface at all.
Since the sys_sysctl implementation needs to stay around for a while and
the worst of the maintenance issues that caused us to occasionally break
the ABI have been addressed I don't see any advantage in continuing with
the removal of sys_sysctl.
So instead of merely increasing the deprecation period this patch removes
the deprecation of sys_sysctl and modifies the kernel to compile the code
in by default.
With committing to maintain sys_sysctl we get all of the advantages of a
fast interface for anything that needs it. Currently sys_sysctl is about
5x faster than /proc/sys, for the same string data.
Signed-off-by: Eric W. Biederman <ebiederm@xxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxx>
---
Documentation/feature-removal-schedule.txt | 12 ------------
init/Kconfig | 2 +-
2 files changed, 1 insertion(+), 13 deletions(-)
diff -puN Documentation/feature-removal-schedule.txt~sysctl-undeprecate-sys_sysctl Documentation/feature-removal-schedule.txt
--- a/Documentation/feature-removal-schedule.txt~sysctl-undeprecate-sys_sysctl
+++ a/Documentation/feature-removal-schedule.txt
@@ -53,18 +53,6 @@ Who: Mauro Carvalho Chehab <mchehab@brtu
---------------------------
-What: sys_sysctl
-When: January 2007
-Why: The same information is available through /proc/sys and that is the
- interface user space prefers to use. And there do not appear to be
- any existing user in user space of sys_sysctl. The additional
- maintenance overhead of keeping a set of binary names gets
- in the way of doing a good job of maintaining this interface.
-
-Who: Eric Biederman <ebiederm@xxxxxxxxxxxx>
-
----------------------------
-
What: PCMCIA control ioctl (needed for pcmcia-cs [cardmgr, cardctl])
When: November 2005
Files: drivers/pcmcia/: pcmcia_ioctl.c
diff -puN init/Kconfig~sysctl-undeprecate-sys_sysctl init/Kconfig
--- a/init/Kconfig~sysctl-undeprecate-sys_sysctl
+++ a/init/Kconfig
@@ -324,7 +324,7 @@ config UID16
config SYSCTL_SYSCALL
bool "Sysctl syscall support" if EMBEDDED
- default n
+ default y
select SYSCTL
---help---
Enable the deprecated sysctl system call. sys_sysctl uses
_
Patches currently in -mm which might be from ebiederm@xxxxxxxxxxxx are
sysctl-undeprecate-sys_sysctl.patch
htirq-refactor-so-we-only-have-one-function-that-writes-to-the-chip.patch
htirq-allow-buggy-drivers-of-buggy-hardware-to-write-the-registers.patch
htirq-allow-buggy-drivers-of-buggy-hardware-to-write-the-registers-update.patch
add-process_session-helper-routine.patch
rename-struct-namespace-to-struct-mnt_namespace.patch
add-an-identifier-to-nsproxy.patch
rename-struct-pspace-to-struct-pid_namespace.patch
add-pid_namespace-to-nsproxy.patch
use-current-nsproxy-pid_ns.patch
add-child-reaper-to-pid_namespace.patch
rename-struct-namespace-to-struct-mnt_namespace-cachefiles.patch
pidhash-temporary-debug-checks.patch
-
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