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author | Eric W. Biederman <ebiederm@xmission.com> | 2011-03-23 16:43:12 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2011-03-23 19:46:57 -0700 |
commit | 45a68628d37222e655219febce9e91b6484789b2 (patch) | |
tree | 6acb5c45e8b11022358a1c28691c9b2c75a7df91 /include/linux/pid.h | |
parent | bfdc0b497faa82a0ba2f9dddcf109231dd519fcc (diff) | |
download | linux-stable-45a68628d37222e655219febce9e91b6484789b2.tar.gz linux-stable-45a68628d37222e655219febce9e91b6484789b2.tar.bz2 linux-stable-45a68628d37222e655219febce9e91b6484789b2.zip |
pid: remove the child_reaper special case in init/main.c
This patchset is a cleanup and a preparation to unshare the pid namespace.
These prerequisites prepare for Eric's patchset to give a file descriptor
to a namespace and join an existing namespace.
This patch:
It turns out that the existing assignment in copy_process of the
child_reaper can handle the initial assignment of child_reaper we just
need to generalize the test in kernel/fork.c
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@free.fr>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Alexey Dobriyan <adobriyan@gmail.com>
Acked-by: Serge E. Hallyn <serge@hallyn.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux/pid.h')
-rw-r--r-- | include/linux/pid.h | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/include/linux/pid.h b/include/linux/pid.h index 49f1c2f66e95..efceda0a51b1 100644 --- a/include/linux/pid.h +++ b/include/linux/pid.h @@ -141,6 +141,17 @@ static inline struct pid_namespace *ns_of_pid(struct pid *pid) } /* + * is_child_reaper returns true if the pid is the init process + * of the current namespace. As this one could be checked before + * pid_ns->child_reaper is assigned in copy_process, we check + * with the pid number. + */ +static inline bool is_child_reaper(struct pid *pid) +{ + return pid->numbers[pid->level].nr == 1; +} + +/* * the helpers to get the pid's id seen from different namespaces * * pid_nr() : global id, i.e. the id seen from the init namespace; |