Task Control Groups: make cpusets a client of cgroups

Remove the filesystem support logic from the cpusets system and makes cpusets
a cgroup subsystem

The "cpuset" filesystem becomes a dummy filesystem; attempts to mount it get
passed through to the cgroup filesystem with the appropriate options to
emulate the old cpuset filesystem behaviour.

Signed-off-by: Paul Menage <menage@google.com>
Cc: Serge E. Hallyn <serue@us.ibm.com>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Dave Hansen <haveblue@us.ibm.com>
Cc: Balbir Singh <balbir@in.ibm.com>
Cc: Paul Jackson <pj@sgi.com>
Cc: Kirill Korotaev <dev@openvz.org>
Cc: Herbert Poetzl <herbert@13thfloor.at>
Cc: Srivatsa Vaddagiri <vatsa@in.ibm.com>
Cc: Cedric Le Goater <clg@fr.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 6 insertions, 1 deletions

diff --git a/init/Kconfig b/init/Kconfig
index 51b3d14f44f1..18b1abc677da 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -280,7 +280,7 @@ config CGROUPS
 
 config CPUSETS
         bool "Cpuset support"
-        depends on SMP
+        depends on SMP && CGROUPS
         help
           This option will let you create and manage CPUSETs which
           allow dynamically partitioning a system into sets of CPUs and
@@ -330,6 +330,11 @@ config SYSFS_DEPRECATED
           If you are using a distro that was released in 2006 or later,
           it should be safe to say N here.
 
+config PROC_PID_CPUSET
+        bool "Include legacy /proc/<pid>/cpuset file"
+        depends on CPUSETS
+        default y
+
 config RELAY
         bool "Kernel->user space relay support (formerly relayfs)"
         help