6 files changed, 10 insertions, 19 deletions

diff --git a/drivers/md/dm-crypt.c b/drivers/md/dm-crypt.c
index 77619a56e2bf..0dd6c2b5391b 100644
--- a/drivers/md/dm-crypt.c
+++ b/drivers/md/dm-crypt.c
@@ -331,25 +331,19 @@ crypt_alloc_buffer(struct crypt_config *cc, unsigned int size,
         struct bio *bio;
         unsigned int nr_iovecs = (size + PAGE_SIZE - 1) >> PAGE_SHIFT;
         int gfp_mask = GFP_NOIO | __GFP_HIGHMEM;
-        unsigned long flags = current->flags;
         unsigned int i;
 
         /*
-         * Tell VM to act less aggressively and fail earlier.
-         * This is not necessary but increases throughput.
+         * Use __GFP_NOMEMALLOC to tell the VM to act less aggressively and
+         * to fail earlier.  This is not necessary but increases throughput.
          * FIXME: Is this really intelligent?
          */
-        current->flags &= ~PF_MEMALLOC;
-
         if (base_bio)
-                bio = bio_clone(base_bio, GFP_NOIO);
+                bio = bio_clone(base_bio, GFP_NOIO|__GFP_NOMEMALLOC);
         else
-                bio = bio_alloc(GFP_NOIO, nr_iovecs);
-        if (!bio) {
-                if (flags & PF_MEMALLOC)
-                        current->flags |= PF_MEMALLOC;
+                bio = bio_alloc(GFP_NOIO|__GFP_NOMEMALLOC, nr_iovecs);
+        if (!bio)
                 return NULL;
-        }
 
         /* if the last bio was not complete, continue where that one ended */
         bio->bi_idx = *bio_vec_idx;
@@ -386,9 +380,6 @@ crypt_alloc_buffer(struct crypt_config *cc, unsigned int size,
                 size -= bv->bv_len;
         }
 
-        if (flags & PF_MEMALLOC)
-                current->flags |= PF_MEMALLOC;
-
         if (!bio->bi_size) {
                 bio_put(bio);
                 return NULL;
diff --git a/drivers/md/multipath.c b/drivers/md/multipath.c
index c9b134cd1532..1891e4930dcc 100644
--- a/drivers/md/multipath.c
+++ b/drivers/md/multipath.c
@@ -355,7 +355,7 @@ static int multipath_remove_disk(mddev_t *mddev, int number)
                         goto abort;
                 }
                 p->rdev = NULL;
-                synchronize_kernel();
+                synchronize_rcu();
                 if (atomic_read(&rdev->nr_pending)) {
                         /* lost the race, try later */
                         err = -EBUSY;
diff --git a/drivers/md/raid1.c b/drivers/md/raid1.c
index a389394b52f6..83380b5d6593 100644
--- a/drivers/md/raid1.c
+++ b/drivers/md/raid1.c
@@ -797,7 +797,7 @@ static int raid1_remove_disk(mddev_t *mddev, int number)
                         goto abort;
                 }
                 p->rdev = NULL;
-                synchronize_kernel();
+                synchronize_rcu();
                 if (atomic_read(&rdev->nr_pending)) {
                         /* lost the race, try later */
                         err = -EBUSY;
diff --git a/drivers/md/raid10.c b/drivers/md/raid10.c
index b100bfe4fdca..e9dc2876a626 100644
--- a/drivers/md/raid10.c
+++ b/drivers/md/raid10.c
@@ -977,7 +977,7 @@ static int raid10_remove_disk(mddev_t *mddev, int number)
                         goto abort;
                 }
                 p->rdev = NULL;
-                synchronize_kernel();
+                synchronize_rcu();
                 if (atomic_read(&rdev->nr_pending)) {
                         /* lost the race, try later */
                         err = -EBUSY;
diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c
index 52c3a81c4aa7..e96e2a10a9c9 100644
--- a/drivers/md/raid5.c
+++ b/drivers/md/raid5.c
@@ -1873,7 +1873,7 @@ static int raid5_remove_disk(mddev_t *mddev, int number)
                         goto abort;
                 }
                 p->rdev = NULL;
-                synchronize_kernel();
+                synchronize_rcu();
                 if (atomic_read(&rdev->nr_pending)) {
                         /* lost the race, try later */
                         err = -EBUSY;
diff --git a/drivers/md/raid6main.c b/drivers/md/raid6main.c
index 7e30ab29691a..8a33f351e092 100644
--- a/drivers/md/raid6main.c
+++ b/drivers/md/raid6main.c
@@ -2038,7 +2038,7 @@ static int raid6_remove_disk(mddev_t *mddev, int number)
                         goto abort;
                 }
                 p->rdev = NULL;
-                synchronize_kernel();
+                synchronize_rcu();
                 if (atomic_read(&rdev->nr_pending)) {
                         /* lost the race, try later */
                         err = -EBUSY;