WSL2-Linux-Kernel/arch/powerpc
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
..
boot [POWERPC] mpc52xx: device tree changes for FEC and MDIO 2007-10-16 17:10:32 -06:00
configs task cgroups: enable cgroups by default in some configs 2007-10-19 11:53:36 -07:00
kernel pid namespaces: define is_global_init() and is_container_init() 2007-10-19 11:53:37 -07:00
lib [POWERPC] rheap: Changes config mechanism 2007-10-16 17:09:21 -06:00
math-emu [POWERPC] Fix handling of stfiwx math emulation 2007-10-16 09:05:24 -05:00
mm pid namespaces: define is_global_init() and is_container_init() 2007-10-19 11:53:37 -07:00
oprofile [POWERPC] cell: Move cbe_regs.h to include/asm-powerpc/cell-regs.h 2007-10-09 21:01:56 +10:00
platforms pid namespaces: define is_global_init() and is_container_init() 2007-10-19 11:53:37 -07:00
sysdev Merge branch 'for-2.6.24' of git://git.secretlab.ca/git/linux-2.6-mpc52xx into merge 2007-10-17 22:31:13 +10:00
xmon [POWERPC] fix showing xmon help 2007-07-22 21:30:58 +10:00
.gitignore [POWERPC] Add files build to .gitignore 2006-12-04 20:41:29 +11:00
Kconfig Merge branch 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc 2007-10-17 09:05:55 -07:00
Kconfig.debug kconfig: syntax cleanup - drop support for "depends/requires/def_boolean" 2007-10-12 21:20:32 +02:00
Makefile kbuild: enable 'make CPPFLAGS=...' to add additional options to CPP 2007-10-15 22:17:25 +02:00