The patch titled
free_pidmap: turn it into free_pidmap(struct upid *)
has been added to the -mm tree. Its filename is
free_pidmap-turn-it-into-free_pidmapstruct-upid.patch
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See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
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The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/
------------------------------------------------------
Subject: free_pidmap: turn it into free_pidmap(struct upid *)
From: Oleg Nesterov <oleg@xxxxxxxxxx>
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@xxxxxxxxxx>
Cc: Pavel Emelyanov <xemul@xxxxxxxxxx>
Cc: "Eric W. Biederman" <ebiederm@xxxxxxxxxxxx>
Cc :Roland McGrath <roland@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
kernel/pid.c | 13 +++++++------
1 file changed, 7 insertions(+), 6 deletions(-)
diff -puN kernel/pid.c~free_pidmap-turn-it-into-free_pidmapstruct-upid kernel/pid.c
--- a/kernel/pid.c~free_pidmap-turn-it-into-free_pidmapstruct-upid
+++ a/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;
_
Patches currently in -mm which might be from oleg@xxxxxxxxxx are
mmap_region-cleanup-the-final-vma_merge-related-code.patch
remove-unused-variable-from-send_signal.patch
turn-legacy_queue-macro-into-static-inline-function.patch
consolidate-checking-for-ignored-legacy-signals.patch
consolidate-checking-for-ignored-legacy-signals-simplify.patch
signals-do_signal_stop-use-signal_group_exit.patch
signals-do_group_exit-use-signal_group_exit-more-consistently.patch
timers-simplify-lockdep-stuff.patch
hrtimers-simplify-lockdep-stuff.patch
kill-double_spin_lock.patch
procfs-task-exe-symlink.patch
procfs-task-exe-symlink-fix.patch
free_pidmap-turn-it-into-free_pidmapstruct-upid.patch
-
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