linux/arch/avr32/mm
Serge E. Hallyn b460cbc581 pid namespaces: define is_global_init() and is_container_init()
is_init() is an ambiguous name for the pid==1 check.  Split it into
is_global_init() and is_container_init().

A cgroup init has it's tsk->pid == 1.

A global init also has it's tsk->pid == 1 and it's active pid namespace
is the init_pid_ns.  But rather than check the active pid namespace,
compare the task structure with 'init_pid_ns.child_reaper', which is
initialized during boot to the /sbin/init process and never changes.

Changelog:

	2.6.22-rc4-mm2-pidns1:
	- Use 'init_pid_ns.child_reaper' to determine if a given task is the
	  global init (/sbin/init) process. This would improve performance
	  and remove dependence on the task_pid().

	2.6.21-mm2-pidns2:

	- [Sukadev Bhattiprolu] Changed is_container_init() calls in {powerpc,
	  ppc,avr32}/traps.c for the _exception() call to is_global_init().
	  This way, we kill only the cgroup if the cgroup's init has a
	  bug rather than force a kernel panic.

[akpm@linux-foundation.org: fix comment]
[sukadev@us.ibm.com: Use is_global_init() in arch/m32r/mm/fault.c]
[bunk@stusta.de: kernel/pid.c: remove unused exports]
[sukadev@us.ibm.com: Fix capability.c to work with threaded init]
Signed-off-by: Serge E. Hallyn <serue@us.ibm.com>
Signed-off-by: Sukadev Bhattiprolu <sukadev@us.ibm.com>
Acked-by: Pavel Emelianov <xemul@openvz.org>
Cc: Eric W. Biederman <ebiederm@xmission.com>
Cc: Cedric Le Goater <clg@fr.ibm.com>
Cc: Dave Hansen <haveblue@us.ibm.com>
Cc: Herbert Poetzel <herbert@13thfloor.at>
Cc: Kirill Korotaev <dev@sw.ru>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-10-19 11:53:37 -07:00
..
cache.c [AVR32] Fix bug in invalidate_dcache_region() 2007-06-23 14:52:52 +02:00
clear_page.S [PATCH] avr32 architecture 2006-09-26 08:48:54 -07:00
copy_page.S [PATCH] avr32 architecture 2006-09-26 08:48:54 -07:00
dma-coherent.c Remove dma_cache_(wback|inv|wback_inv) functions 2007-10-17 08:42:57 -07:00
fault.c pid namespaces: define is_global_init() and is_container_init() 2007-10-19 11:53:37 -07:00
init.c [AVR32] Drop support for redundant "keepinitrd" boot-time parm. 2007-10-11 12:16:57 +02:00
ioremap.c [PATCH] AVR32: Don't try to iounmap P2 segment addresses 2006-10-25 20:26:33 -07:00
Makefile [PATCH] avr32 architecture 2006-09-26 08:48:54 -07:00
tlb.c [PATCH] mark struct file_operations const 2 2007-02-12 09:48:44 -08:00