A clean up patch: I think it is a lot easier to read AIO_EVENTS_OFFSET
as an offset because of aio_ring at the beginning of a head page, instead
of doing arithmetic of (event on 2nd page - event on 1st page).
Signed-off-by: Ken Chen <[email protected]>
diff -Nurp linux-2.6.18/fs/aio.c linux-2.6.18.ken/fs/aio.c
--- linux-2.6.18/fs/aio.c 2006-09-19 20:42:06.000000000 -0700
+++ linux-2.6.18.ken/fs/aio.c 2006-10-12 13:33:09.000000000 -0700
@@ -173,9 +173,8 @@ static int aio_setup_ring(struct kioctx
/* aio_ring_event: returns a pointer to the event at the given index from
* kmap_atomic(, km). Release the pointer with put_aio_ring_event();
*/
-#define AIO_EVENTS_PER_PAGE (PAGE_SIZE / sizeof(struct io_event))
-#define AIO_EVENTS_FIRST_PAGE ((PAGE_SIZE - sizeof(struct aio_ring)) / sizeof(struct io_event))
-#define AIO_EVENTS_OFFSET (AIO_EVENTS_PER_PAGE - AIO_EVENTS_FIRST_PAGE)
+#define AIO_EVENTS_PER_PAGE (PAGE_SIZE / sizeof(struct io_event))
+#define AIO_EVENTS_OFFSET (sizeof(struct aio_ring) / sizeof(struct io_event))
#define aio_ring_event(info, nr, km) ({ \
unsigned pos = (nr) + AIO_EVENTS_OFFSET; \
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[Index of Archives]
[Kernel Newbies]
[Netfilter]
[Bugtraq]
[Photo]
[Stuff]
[Gimp]
[Yosemite News]
[MIPS Linux]
[ARM Linux]
[Linux Security]
[Linux RAID]
[Video 4 Linux]
[Linux for the blind]
[Linux Resources]
