android_kernel_xiaomi_sm8350/arch/powerpc/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
..
40x_mmu.c [POWERPC] 40x MMU 2007-08-20 07:28:48 -05:00
44x_mmu.c
fault.c pid namespaces: define is_global_init() and is_container_init() 2007-10-19 11:53:37 -07:00
fsl_booke_mmu.c [POWERPC] 85xx: Failure with odd memory sizes and CONFIG_HIGHMEM 2007-10-08 08:38:34 -05:00
hash_low_32.S
hash_low_64.S [POWERPC] Use 1TB segments 2007-10-12 14:05:17 +10:00
hash_native_64.c [POWERPC] Use 1TB segments 2007-10-12 14:05:17 +10:00
hash_utils_64.c [POWERPC] Add 1TB workaround for PA6T 2007-10-17 22:30:09 +10:00
hugetlbpage.c Slab API: remove useless ctor parameter and reorder parameters 2007-10-17 08:42:45 -07:00
init_32.c [POWERPC] 8xx: Set initial memory limit. 2007-10-03 20:36:36 -05:00
init_64.c Merge branch 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc 2007-10-17 09:05:55 -07:00
lmb.c
Makefile [POWERPC] Create and use CONFIG_WORD_SIZE 2007-10-03 09:12:02 +10:00
mem.c fix memory hot remove not configured case. 2007-10-16 09:43:02 -07:00
mmap.c
mmu_context_32.c
mmu_context_64.c
mmu_decl.h
numa.c
pgtable_32.c
pgtable_64.c [POWERPC] Use 1TB segments 2007-10-12 14:05:17 +10:00
ppc_mmu_32.c
slb_low.S [POWERPC] Use 1TB segments 2007-10-12 14:05:17 +10:00
slb.c [POWERPC] Add 1TB workaround for PA6T 2007-10-17 22:30:09 +10:00
slice.c spin_lock_unlocked cleanups 2007-10-17 08:43:01 -07:00
stab.c [POWERPC] Use 1TB segments 2007-10-12 14:05:17 +10:00
tlb_32.c
tlb_64.c [POWERPC] Use 1TB segments 2007-10-12 14:05:17 +10:00