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fs: remove the second argument of k[un]map_atomic()

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Acked-by: Benjamin LaHaise <bcrl@kvack.org>
Signed-off-by: Cong Wang <amwang@redhat.com>
This commit is contained in:
Cong Wang
2011-11-25 23:14:27 +08:00
committed by Cong Wang
parent c6daa7ffa8
commit e8e3c3d66f
7 changed files with 34 additions and 37 deletions
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30
fs/aio.c
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@@ -160,7 +160,7 @@ static int aio_setup_ring(struct kioctx *ctx)
info->nr = nr_events; /* trusted copy */
ring = kmap_atomic(info->ring_pages[0], KM_USER0);
ring = kmap_atomic(info->ring_pages[0]);
ring->nr = nr_events; /* user copy */
ring->id = ctx->user_id;
ring->head = ring->tail = 0;
@@ -168,32 +168,32 @@ static int aio_setup_ring(struct kioctx *ctx)
ring->compat_features = AIO_RING_COMPAT_FEATURES;
ring->incompat_features = AIO_RING_INCOMPAT_FEATURES;
ring->header_length = sizeof(struct aio_ring);
kunmap_atomic(ring, KM_USER0);
kunmap_atomic(ring);
return 0;
}
/* 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();
* kmap_atomic(). 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_ring_event(info, nr, km) ({ \
#define aio_ring_event(info, nr) ({ \
unsigned pos = (nr) + AIO_EVENTS_OFFSET; \
struct io_event *__event; \
__event = kmap_atomic( \
(info)->ring_pages[pos / AIO_EVENTS_PER_PAGE], km); \
(info)->ring_pages[pos / AIO_EVENTS_PER_PAGE]); \
__event += pos % AIO_EVENTS_PER_PAGE; \
__event; \
})
#define put_aio_ring_event(event, km) do { \
#define put_aio_ring_event(event) do { \
struct io_event *__event = (event); \
(void)__event; \
kunmap_atomic((void *)((unsigned long)__event & PAGE_MASK), km); \
kunmap_atomic((void *)((unsigned long)__event & PAGE_MASK)); \
} while(0)
static void ctx_rcu_free(struct rcu_head *head)
@@ -1019,10 +1019,10 @@ int aio_complete(struct kiocb *iocb, long res, long res2)
if (kiocbIsCancelled(iocb))
goto put_rq;
ring = kmap_atomic(info->ring_pages[0], KM_IRQ1);
ring = kmap_atomic(info->ring_pages[0]);
tail = info->tail;
event = aio_ring_event(info, tail, KM_IRQ0);
event = aio_ring_event(info, tail);
if (++tail >= info->nr)
tail = 0;
@@ -1043,8 +1043,8 @@ int aio_complete(struct kiocb *iocb, long res, long res2)
info->tail = tail;
ring->tail = tail;
put_aio_ring_event(event, KM_IRQ0);
kunmap_atomic(ring, KM_IRQ1);
put_aio_ring_event(event);
kunmap_atomic(ring);
pr_debug("added to ring %p at [%lu]\n", iocb, tail);
@@ -1089,7 +1089,7 @@ static int aio_read_evt(struct kioctx *ioctx, struct io_event *ent)
unsigned long head;
int ret = 0;
ring = kmap_atomic(info->ring_pages[0], KM_USER0);
ring = kmap_atomic(info->ring_pages[0]);
dprintk("in aio_read_evt h%lu t%lu m%lu\n",
(unsigned long)ring->head, (unsigned long)ring->tail,
(unsigned long)ring->nr);
@@ -1101,18 +1101,18 @@ static int aio_read_evt(struct kioctx *ioctx, struct io_event *ent)
head = ring->head % info->nr;
if (head != ring->tail) {
struct io_event *evp = aio_ring_event(info, head, KM_USER1);
struct io_event *evp = aio_ring_event(info, head);
*ent = *evp;
head = (head + 1) % info->nr;
smp_mb(); /* finish reading the event before updatng the head */
ring->head = head;
ret = 1;
put_aio_ring_event(evp, KM_USER1);
put_aio_ring_event(evp);
}
spin_unlock(&info->ring_lock);
out:
kunmap_atomic(ring, KM_USER0);
kunmap_atomic(ring);
dprintk("leaving aio_read_evt: %d h%lu t%lu\n", ret,
(unsigned long)ring->head, (unsigned long)ring->tail);
return ret;