diff options
| author | Oleg Nesterov <oleg@tv-sign.ru> | 2008-04-30 11:54:22 +0400 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-04-30 19:29:48 +0400 |
| commit | b7127aa4547d8cc8a5b569631e2b6ef613af1bb7 (patch) | |
| tree | b4a2ec699864c865c6286a48debfd13565ab4987 | |
| parent | 718a916338e821a10961e6a7a17430c18e5e58d9 (diff) | |
| download | linux-b7127aa4547d8cc8a5b569631e2b6ef613af1bb7.tar.xz | |
free_pidmap: turn it into free_pidmap(struct upid *)
The callers of free_pidmap() pass 2 members of "struct upid", we can just
pass "struct upid *" instead. Shaves off 10 bytes from pid.o.
Also, simplify the alloc_pid's "out_free:" error path a little bit. This
way it looks more clear which subset of pid->numbers[] we are freeing.
Signed-off-by: Oleg Nesterov <oleg@tv-sign.ru>
Cc: Pavel Emelyanov <xemul@openvz.org>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc :Roland McGrath <roland@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | kernel/pid.c | 13 |
1 files changed, 7 insertions, 6 deletions
diff --git a/kernel/pid.c b/kernel/pid.c index 477691576b33..b322cdf401bf 100644 --- a/kernel/pid.c +++ b/kernel/pid.c @@ -111,10 +111,11 @@ EXPORT_SYMBOL(is_container_init); static __cacheline_aligned_in_smp DEFINE_SPINLOCK(pidmap_lock); -static void free_pidmap(struct pid_namespace *pid_ns, int pid) +static void free_pidmap(struct upid *upid) { - struct pidmap *map = pid_ns->pidmap + pid / BITS_PER_PAGE; - int offset = pid & BITS_PER_PAGE_MASK; + int nr = upid->nr; + struct pidmap *map = upid->ns->pidmap + nr / BITS_PER_PAGE; + int offset = nr & BITS_PER_PAGE_MASK; clear_bit(offset, map->page); atomic_inc(&map->nr_free); @@ -232,7 +233,7 @@ void free_pid(struct pid *pid) spin_unlock_irqrestore(&pidmap_lock, flags); for (i = 0; i <= pid->level; i++) - free_pidmap(pid->numbers[i].ns, pid->numbers[i].nr); + free_pidmap(pid->numbers + i); call_rcu(&pid->rcu, delayed_put_pid); } @@ -278,8 +279,8 @@ out: return pid; out_free: - for (i++; i <= ns->level; i++) - free_pidmap(pid->numbers[i].ns, pid->numbers[i].nr); + while (++i <= ns->level) + free_pidmap(pid->numbers + i); kmem_cache_free(ns->pid_cachep, pid); pid = NULL; |