The patch titled
pid: reduce code size by using a pointer to iterate over array
has been removed from the -mm tree. Its filename was
pid-reduce-code-size-by-using-a-pointer-to-iterate-over-array.patch
This patch was dropped because it was merged into mainline or a subsystem tree
The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/
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Subject: pid: reduce code size by using a pointer to iterate over array
From: André Goddard Rosa <andre.goddard@xxxxxxxxx>
It decreases code size by 16 bytes on my gcc 4.4.1 on Core 2:
text data bss dec hex filename
4314 2216 8 6538 198a kernel/pid.o-BEFORE
4298 2216 8 6522 197a kernel/pid.o-AFTER
Signed-off-by: André Goddard Rosa <andre.goddard@xxxxxxxxx>
Cc: Pekka Enberg <penberg@xxxxxxxxxxxxxx>
Cc: Oleg Nesterov <oleg@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
kernel/pid.c | 5 ++---
1 file changed, 2 insertions(+), 3 deletions(-)
diff -puN kernel/pid.c~pid-reduce-code-size-by-using-a-pointer-to-iterate-over-array kernel/pid.c
--- a/kernel/pid.c~pid-reduce-code-size-by-using-a-pointer-to-iterate-over-array
+++ a/kernel/pid.c
@@ -269,12 +269,11 @@ struct pid *alloc_pid(struct pid_namespa
for (type = 0; type < PIDTYPE_MAX; ++type)
INIT_HLIST_HEAD(&pid->tasks[type]);
+ upid = pid->numbers + ns->level;
spin_lock_irq(&pidmap_lock);
- for (i = ns->level; i >= 0; i--) {
- upid = &pid->numbers[i];
+ for ( ; upid >= pid->numbers; --upid)
hlist_add_head_rcu(&upid->pid_chain,
&pid_hash[pid_hashfn(upid->nr, upid->ns)]);
- }
spin_unlock_irq(&pidmap_lock);
out:
_
Patches currently in -mm which might be from andre.goddard@xxxxxxxxx are
origin.patch
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