Merge branch 'for-linus' of git://git.kernel.dk/linux-2.6-block

* 'for-linus' of git://git.kernel.dk/linux-2.6-block:
  cfq-iosched: reset oom_cfqq in cfq_set_request()
  block: fix sg SG_DXFER_TO_FROM_DEV regression
  block: call blk_scsi_ioctl_init()
  Fix congestion_wait() sync/async vs read/write confusion

7 files changed, 26 insertions, 22 deletions

diff --git a/fs/bio.c b/fs/bio.c
index 1486b19fc431..76738005c8e8 100644
--- a/fs/bio.c
+++ b/fs/bio.c
@@ -705,14 +705,13 @@ static struct bio_map_data *bio_alloc_map_data(int nr_segs, int iov_count,
 }
 
 static int __bio_copy_iov(struct bio *bio, struct bio_vec *iovecs,
-                          struct sg_iovec *iov, int iov_count, int uncopy,
-                          int do_free_page)
+                          struct sg_iovec *iov, int iov_count,
+                          int to_user, int from_user, int do_free_page)
 {
         int ret = 0, i;
         struct bio_vec *bvec;
         int iov_idx = 0;
         unsigned int iov_off = 0;
-        int read = bio_data_dir(bio) == READ;
 
         __bio_for_each_segment(bvec, bio, i, 0) {
                 char *bv_addr = page_address(bvec->bv_page);
@@ -727,13 +726,14 @@ static int __bio_copy_iov(struct bio *bio, struct bio_vec *iovecs,
                         iov_addr = iov[iov_idx].iov_base + iov_off;
 
                         if (!ret) {
-                                if (!read && !uncopy)
-                                        ret = copy_from_user(bv_addr, iov_addr,
-                                                             bytes);
-                                if (read && uncopy)
+                                if (to_user)
                                         ret = copy_to_user(iov_addr, bv_addr,
                                                            bytes);
 
+                                if (from_user)
+                                        ret = copy_from_user(bv_addr, iov_addr,
+                                                             bytes);
+
                                 if (ret)
                                         ret = -EFAULT;
                         }
@@ -770,7 +770,8 @@ int bio_uncopy_user(struct bio *bio)
 
         if (!bio_flagged(bio, BIO_NULL_MAPPED))
                 ret = __bio_copy_iov(bio, bmd->iovecs, bmd->sgvecs,
-                                     bmd->nr_sgvecs, 1, bmd->is_our_pages);
+                                     bmd->nr_sgvecs, bio_data_dir(bio) == READ,
+                                     0, bmd->is_our_pages);
         bio_free_map_data(bmd);
         bio_put(bio);
         return ret;
@@ -875,8 +876,9 @@ struct bio *bio_copy_user_iov(struct request_queue *q,
         /*
          * success
          */
-        if (!write_to_vm && (!map_data || !map_data->null_mapped)) {
-                ret = __bio_copy_iov(bio, bio->bi_io_vec, iov, iov_count, 0, 0);
+        if ((!write_to_vm && (!map_data || !map_data->null_mapped)) ||
+            (map_data && map_data->from_user)) {
+                ret = __bio_copy_iov(bio, bio->bi_io_vec, iov, iov_count, 0, 1, 0);
                 if (ret)
                         goto cleanup;
         }
diff --git a/fs/fat/file.c b/fs/fat/file.c
index b28ea646ff60..f042b965c95c 100644
--- a/fs/fat/file.c
+++ b/fs/fat/file.c
@@ -134,7 +134,7 @@ static int fat_file_release(struct inode *inode, struct file *filp)
         if ((filp->f_mode & FMODE_WRITE) &&
              MSDOS_SB(inode->i_sb)->options.flush) {
                 fat_flush_inodes(inode->i_sb, inode, NULL);
-                congestion_wait(WRITE, HZ/10);
+                congestion_wait(BLK_RW_ASYNC, HZ/10);
         }
         return 0;
 }
diff --git a/fs/fuse/dev.c b/fs/fuse/dev.c
index f58ecbc416c8..6484eb75acd6 100644
--- a/fs/fuse/dev.c
+++ b/fs/fuse/dev.c
@@ -286,8 +286,8 @@ __releases(&fc->lock)
                 }
                 if (fc->num_background == FUSE_CONGESTION_THRESHOLD &&
                     fc->connected && fc->bdi_initialized) {
-                        clear_bdi_congested(&fc->bdi, READ);
-                        clear_bdi_congested(&fc->bdi, WRITE);
+                        clear_bdi_congested(&fc->bdi, BLK_RW_SYNC);
+                        clear_bdi_congested(&fc->bdi, BLK_RW_ASYNC);
                 }
                 fc->num_background--;
                 fc->active_background--;
@@ -414,8 +414,8 @@ static void fuse_request_send_nowait_locked(struct fuse_conn *fc,
                 fc->blocked = 1;
         if (fc->num_background == FUSE_CONGESTION_THRESHOLD &&
             fc->bdi_initialized) {
-                set_bdi_congested(&fc->bdi, READ);
-                set_bdi_congested(&fc->bdi, WRITE);
+                set_bdi_congested(&fc->bdi, BLK_RW_SYNC);
+                set_bdi_congested(&fc->bdi, BLK_RW_ASYNC);
         }
         list_add_tail(&req->list, &fc->bg_queue);
         flush_bg_queue(fc);
diff --git a/fs/nfs/write.c b/fs/nfs/write.c
index ce728829f79a..0a0a2ff767c3 100644
--- a/fs/nfs/write.c
+++ b/fs/nfs/write.c
@@ -202,8 +202,10 @@ static int nfs_set_page_writeback(struct page *page)
                 struct nfs_server *nfss = NFS_SERVER(inode);
 
                 if (atomic_long_inc_return(&nfss->writeback) >
-                                NFS_CONGESTION_ON_THRESH)
-                        set_bdi_congested(&nfss->backing_dev_info, WRITE);
+                                NFS_CONGESTION_ON_THRESH) {
+                        set_bdi_congested(&nfss->backing_dev_info,
+                                                BLK_RW_ASYNC);
+                }
         }
         return ret;
 }
@@ -215,7 +217,7 @@ static void nfs_end_page_writeback(struct page *page)
 
         end_page_writeback(page);
         if (atomic_long_dec_return(&nfss->writeback) < NFS_CONGESTION_OFF_THRESH)
-                clear_bdi_congested(&nfss->backing_dev_info, WRITE);
+                clear_bdi_congested(&nfss->backing_dev_info, BLK_RW_ASYNC);
 }
 
 /*
diff --git a/fs/reiserfs/journal.c b/fs/reiserfs/journal.c
index 77f5bb746bf0..90622200b39c 100644
--- a/fs/reiserfs/journal.c
+++ b/fs/reiserfs/journal.c
@@ -997,7 +997,7 @@ static int reiserfs_async_progress_wait(struct super_block *s)
         DEFINE_WAIT(wait);
         struct reiserfs_journal *j = SB_JOURNAL(s);
         if (atomic_read(&j->j_async_throttle))
-                congestion_wait(WRITE, HZ / 10);
+                congestion_wait(BLK_RW_ASYNC, HZ / 10);
         return 0;
 }
 
diff --git a/fs/xfs/linux-2.6/kmem.c b/fs/xfs/linux-2.6/kmem.c
index 1cd3b55ee3d2..2d3f90afe5f1 100644
--- a/fs/xfs/linux-2.6/kmem.c
+++ b/fs/xfs/linux-2.6/kmem.c
@@ -53,7 +53,7 @@ kmem_alloc(size_t size, unsigned int __nocast flags)
                         printk(KERN_ERR "XFS: possible memory allocation "
                                         "deadlock in %s (mode:0x%x)\n",
                                         __func__, lflags);
-                congestion_wait(WRITE, HZ/50);
+                congestion_wait(BLK_RW_ASYNC, HZ/50);
         } while (1);
 }
 
@@ -130,7 +130,7 @@ kmem_zone_alloc(kmem_zone_t *zone, unsigned int __nocast flags)
                         printk(KERN_ERR "XFS: possible memory allocation "
                                         "deadlock in %s (mode:0x%x)\n",
                                         __func__, lflags);
-                congestion_wait(WRITE, HZ/50);
+                congestion_wait(BLK_RW_ASYNC, HZ/50);
         } while (1);
 }
 
diff --git a/fs/xfs/linux-2.6/xfs_buf.c b/fs/xfs/linux-2.6/xfs_buf.c
index 1418b916fc27..0c93c7ef3d18 100644
--- a/fs/xfs/linux-2.6/xfs_buf.c
+++ b/fs/xfs/linux-2.6/xfs_buf.c
@@ -412,7 +412,7 @@ _xfs_buf_lookup_pages(
 
                         XFS_STATS_INC(xb_page_retries);
                         xfsbufd_wakeup(0, gfp_mask);
-                        congestion_wait(WRITE, HZ/50);
+                        congestion_wait(BLK_RW_ASYNC, HZ/50);
                         goto retry;
                 }