• Pavel Emelyanov's avatar
    namespaces: move the IPC namespace under IPC_NS option · ae5e1b22
    Pavel Emelyanov authored
    Currently the IPC namespace management code is spread over the ipc/*.c files.
    I moved this code into ipc/namespace.c file which is compiled out when needed.
    The linux/ipc_namespace.h file is used to store the prototypes of the
    functions in namespace.c and the stubs for NAMESPACES=n case.  This is done
    so, because the stub for copy_ipc_namespace requires the knowledge of the
    CLONE_NEWIPC flag, which is in sched.h.  But the linux/ipc.h file itself in
    included into many many .c files via the sys.h->sem.h sequence so adding the
    sched.h into it will make all these .c depend on sched.h which is not that
    good.  On the other hand the knowledge about the namespaces stuff is required
    in 4 .c files only.
    Besides, this patch compiles out some auxiliary functions from ipc/sem.c,
    msg.c and shm.c files.  It turned out that moving these functions into
    namespaces.c is not that easy because they use many other calls and macros
    from the original file.  Moving them would make this patch complicated.  On
    the other hand all these functions can be consolidated, so I will send a
    separate patch doing this a bit later.
    Signed-off-by: default avatarPavel Emelyanov <xemul@openvz.org>
    Acked-by: default avatarSerge Hallyn <serue@us.ibm.com>
    Cc: Cedric Le Goater <clg@fr.ibm.com>
    Cc: "Eric W. Biederman" <ebiederm@xmission.com>
    Cc: Herbert Poetzl <herbert@13thfloor.at>
    Cc: Kirill Korotaev <dev@sw.ru>
    Cc: Sukadev Bhattiprolu <sukadev@us.ibm.com>
    Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
    Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
util.c 20 KB