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[PATCH] pid: implement pid_nr

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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>
This commit is contained in:
Eric W. Biederman 2006-10-02 02:17:12 -07:00 committed by Linus Torvalds
parent bbf73147e2
commit 5feb8f5f84
1 changed files with 8 additions and 0 deletions
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8
include/linux/pid.h
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@ -94,6 +94,14 @@ extern struct pid *find_ge_pid(int nr);
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)