[PATCH] pid: implement pid_nr
As we stop storing pid_t's and move to storing struct pid *. We need a way to
get the pid_t from the struct pid to report to user space what we have stored.
Having a clean well defined way to do this is especially important as we move
to multiple pid spaces as may need to report a different value to the caller
depending on which pid space the caller is in.
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/include/linux/pid.h b/include/linux/pid.h
index 8cf9b11..dba1b2d 100644
--- a/include/linux/pid.h
+++ b/include/linux/pid.h
@@ -94,6 +94,14 @@
extern struct pid *alloc_pid(void);
extern void FASTCALL(free_pid(struct pid *pid));
+static inline pid_t pid_nr(struct pid *pid)
+{
+ pid_t nr = 0;
+ if (pid)
+ nr = pid->nr;
+ return nr;
+}
+
#define pid_next(task, type) \
((task)->pids[(type)].node.next)
