signal/timer/event: KAIO eventfd support example

[linux-2.6-omap-h63xx.git] / include / linux / aio.h

diff --git a/include/linux/aio.h b/include/linux/aio.h
index 9e350fd44d7787d061393d7512e65513d4cf960f..b903fc02bdb7dbc5f95a041dbba4dab24bb67e7c 100644 (file)
--- a/include/linux/aio.h
+++ b/include/linux/aio.h
@@ -105,13 +105,13 @@ struct kiocb {
        wait_queue_t            ki_wait;
        loff_t                  ki_pos;
 
+       atomic_t                ki_bio_count;   /* num bio used for this iocb */
        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 */
-       long                    ki_retried;     /* just for testing */
        struct iovec            ki_inline_vec;  /* inline vector */
        struct iovec            *ki_iovec;
        unsigned long           ki_nr_segs;
@@ -119,6 +119,12 @@ struct kiocb {
 
        struct list_head        ki_list;        /* the aio core uses this
                                                 * for cancellation */
+
+       /*
+        * If the aio_resfd field of the userspace iocb is not zero,
+        * this is the underlying file* to deliver event to.
+        */
+       struct file             *ki_eventfd;
 };
 
 #define is_sync_kiocb(iocb)    ((iocb)->ki_key == KIOCB_SYNC_KEY)
@@ -226,7 +232,8 @@ int FASTCALL(io_submit_one(struct kioctx *ctx, struct iocb __user *user_iocb,
                __put_ioctx(kioctx);                                    \
 } while (0)
 
-#define in_aio() !is_sync_wait(current->io_wait)
+#define in_aio() (unlikely(!is_sync_wait(current->io_wait)))
+
 /* may be used for debugging */
 #define warn_if_async()                                                        \
 do {                                                                   \
@@ -238,7 +245,6 @@ do {                                                                        \
 } while (0)
 
 #define io_wait_to_kiocb(wait) container_of(wait, struct kiocb, ki_wait)
-#define is_retried_kiocb(iocb) ((iocb)->ki_retried > 1)
 
 #include <linux/aio_abi.h>