From: Sébastien Dugué <sebastien.dugue@bull.net>

Allow subsystems to directly call into __sigqueue_alloc() and __sigqueue_free.
This is used by the AIO signal notification patch.

Signed-off-by: Sébastien Dugué <sebastien.dugue@bull.net>
Cc: Bharata B Rao <bharata@in.ibm.com>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Suparna Bhattacharya <suparna@in.ibm.com>
Cc: Zach Brown <zach.brown@oracle.com>
Cc: Oleg Nesterov <oleg@tv-sign.ru>
Cc: Badari Pulavarty <pbadari@us.ibm.com>
Cc: Benjamin LaHaise <bcrl@linux.intel.com>
Cc: Jean Pierre Dion <jean-pierre.dion@bull.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
---

 include/linux/signal.h |    3 +++
 kernel/signal.c        |    6 +++---
 2 files changed, 6 insertions(+), 3 deletions(-)

diff -puN include/linux/signal.h~make-__sigqueue_free-and include/linux/signal.h
--- a/include/linux/signal.h~make-__sigqueue_free-and
+++ a/include/linux/signal.h
@@ -241,6 +241,9 @@ extern int sigprocmask(int, sigset_t *, 
 struct pt_regs;
 extern int get_signal_to_deliver(siginfo_t *info, struct k_sigaction *return_ka, struct pt_regs *regs, void *cookie);
 extern struct task_struct * sigevent_find_task(sigevent_t *);
+extern struct sigqueue *__sigqueue_alloc(struct task_struct *t, gfp_t flags,
+					 int override_rlimit);
+extern void __sigqueue_free(struct sigqueue *q);
 
 extern struct kmem_cache *sighand_cachep;
 
diff -puN kernel/signal.c~make-__sigqueue_free-and kernel/signal.c
--- a/kernel/signal.c~make-__sigqueue_free-and
+++ a/kernel/signal.c
@@ -267,8 +267,8 @@ next_signal(struct sigpending *pending, 
 	return sig;
 }
 
-static struct sigqueue *__sigqueue_alloc(struct task_struct *t, gfp_t flags,
-					 int override_rlimit)
+struct sigqueue *__sigqueue_alloc(struct task_struct *t, gfp_t flags,
+				  int override_rlimit)
 {
 	struct sigqueue *q = NULL;
 	struct user_struct *user;
@@ -294,7 +294,7 @@ static struct sigqueue *__sigqueue_alloc
 	return(q);
 }
 
-static void __sigqueue_free(struct sigqueue *q)
+void __sigqueue_free(struct sigqueue *q)
 {
 	if (q->flags & SIGQUEUE_PREALLOC)
 		return;
_