X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=include%2Flinux%2Faio.h;h=00c8efa95cc3ade224b9e7b61033c414f3dfb464;hb=29e350944fdc2dfca102500790d8ad6d6ff4f69d;hp=403d71dcb7c818beb2b43101af33d6133f6d5622;hpb=7669a22592fc6cc7ac03f55a7db8d23ce938f1dc;p=linux-2.6

diff --git a/include/linux/aio.h b/include/linux/aio.h
index 403d71dcb7..00c8efa95c 100644
--- a/include/linux/aio.h
+++ b/include/linux/aio.h
@@ -94,26 +94,27 @@ struct kiocb {
 	ssize_t			(*ki_retry)(struct kiocb *);
 	void			(*ki_dtor)(struct kiocb *);
 
-	struct list_head	ki_list;	/* the aio core uses this
-						 * for cancellation */
-
 	union {
 		void __user		*user;
 		struct task_struct	*tsk;
 	} ki_obj;
+
 	__u64			ki_user_data;	/* user's data for completion */
+	wait_queue_t		ki_wait;
 	loff_t			ki_pos;
+
+	void			*private;
 	/* State that we remember to be able to restart/retry  */
 	unsigned short		ki_opcode;
 	size_t			ki_nbytes; 	/* copy of iocb->aio_nbytes */
 	char 			__user *ki_buf;	/* remaining iocb->aio_buf */
 	size_t			ki_left; 	/* remaining bytes */
-	wait_queue_t		ki_wait;
 	long			ki_retried; 	/* just for testing */
 	long			ki_kicked; 	/* just for testing */
 	long			ki_queued; 	/* just for testing */
 
-	void			*private;
+	struct list_head	ki_list;	/* the aio core uses this
+						 * for cancellation */
 };
 
 #define is_sync_kiocb(iocb)	((iocb)->ki_key == KIOCB_SYNC_KEY)
@@ -124,8 +125,9 @@ struct kiocb {
 		(x)->ki_users = 1;			\
 		(x)->ki_key = KIOCB_SYNC_KEY;		\
 		(x)->ki_filp = (filp);			\
-		(x)->ki_ctx = &tsk->active_mm->default_kioctx;	\
+		(x)->ki_ctx = NULL;			\
 		(x)->ki_cancel = NULL;			\
+		(x)->ki_retry = NULL;			\
 		(x)->ki_dtor = NULL;			\
 		(x)->ki_obj.tsk = tsk;			\
 		(x)->ki_user_data = 0;                  \
@@ -210,8 +212,15 @@ struct kioctx *lookup_ioctx(unsigned long ctx_id);
 int FASTCALL(io_submit_one(struct kioctx *ctx, struct iocb __user *user_iocb,
 				  struct iocb *iocb));
 
-#define get_ioctx(kioctx)	do { if (unlikely(atomic_read(&(kioctx)->users) <= 0)) BUG(); atomic_inc(&(kioctx)->users); } while (0)
-#define put_ioctx(kioctx)	do { if (unlikely(atomic_dec_and_test(&(kioctx)->users))) __put_ioctx(kioctx); else if (unlikely(atomic_read(&(kioctx)->users) < 0)) BUG(); } while (0)
+#define get_ioctx(kioctx) do {						\
+	BUG_ON(unlikely(atomic_read(&(kioctx)->users) <= 0));		\
+	atomic_inc(&(kioctx)->users);					\
+} while (0)
+#define put_ioctx(kioctx) do {						\
+	BUG_ON(unlikely(atomic_read(&(kioctx)->users) <= 0));		\
+	if (unlikely(atomic_dec_and_test(&(kioctx)->users))) 		\
+		__put_ioctx(kioctx);					\
+} while (0)
 
 #define in_aio() !is_sync_wait(current->io_wait)
 /* may be used for debugging */