Merge remote-tracking branch 'common/android-3.0' into android-samsung-30-wip-mergedown

* common/android-3.0: (1178 commits)
  cpufreq: interactive: remove unused target_validate_time_in_idle
  cpufreq: interactive: Boost frequency on touchscreen input
  cpufreq: Separate speed target revalidate time and initial set time
  cpufreq: interactive: based hispeed bump on target freq, not actual
  cpufreq: interactive: adjust code and documentation to match
  cpufreq: interactive: configurable delay before raising above hispeed
  sync: add poll support
  sw_sync: add fill_driver_data support
  sync: add ioctl to get fence data
  sw_sync: add debug support
  sync: add debugfs support
  sync: add timestamps to sync_pts
  sw_sync: add cpu based sync driver
  sync: Add synchronization framework
  Linux 3.0.28
  Bluetooth: Fix l2cap conn failures for ssp devices
  TOMOYO: Fix mount flags checking order.
  iommu/amd: Make sure IOMMU interrupts are re-enabled on resume
  cred: copy_process() should clear child->replacement_session_keyring
  ASoC: ak4642: fixup: mute needs +1 step
  ...

Conflicts:
	mm/compaction.c

Change-Id: I3dc59225d2435eddbed0c639155179e580891ac8
Signed-off-by: JP Abgrall <jpa@google.com>

3 files changed, 27 insertions, 8 deletions

diff --git a/fs/udf/file.c b/fs/udf/file.c
index 2a346bb..3438b00 100644
--- a/fs/udf/file.c
+++ b/fs/udf/file.c
@@ -125,7 +125,6 @@ static ssize_t udf_file_aio_write(struct kiocb *iocb, const struct iovec *iov,
 			err = udf_expand_file_adinicb(inode);
 			if (err) {
 				udf_debug("udf_expand_adinicb: err=%d\n", err);
-				up_write(&iinfo->i_data_sem);
 				return err;
 			}
 		} else {
@@ -133,9 +132,10 @@ static ssize_t udf_file_aio_write(struct kiocb *iocb, const struct iovec *iov,
 				iinfo->i_lenAlloc = pos + count;
 			else
 				iinfo->i_lenAlloc = inode->i_size;
+			up_write(&iinfo->i_data_sem);
 		}
-	}
-	up_write(&iinfo->i_data_sem);
+	} else
+		up_write(&iinfo->i_data_sem);
 
 	retval = generic_file_aio_write(iocb, iov, nr_segs, ppos);
 	if (retval > 0)
@@ -201,12 +201,10 @@ out:
 static int udf_release_file(struct inode *inode, struct file *filp)
 {
 	if (filp->f_mode & FMODE_WRITE) {
-		mutex_lock(&inode->i_mutex);
 		down_write(&UDF_I(inode)->i_data_sem);
 		udf_discard_prealloc(inode);
 		udf_truncate_tail_extent(inode);
 		up_write(&UDF_I(inode)->i_data_sem);
-		mutex_unlock(&inode->i_mutex);
 	}
 	return 0;
 }
diff --git a/fs/udf/inode.c b/fs/udf/inode.c
index 1d1358e..262050f 100644
--- a/fs/udf/inode.c
+++ b/fs/udf/inode.c
@@ -145,6 +145,12 @@ const struct address_space_operations udf_aops = {
 	.bmap		= udf_bmap,
 };
 
+/*
+ * Expand file stored in ICB to a normal one-block-file
+ *
+ * This function requires i_data_sem for writing and releases it.
+ * This function requires i_mutex held
+ */
 int udf_expand_file_adinicb(struct inode *inode)
 {
 	struct page *page;
@@ -163,9 +169,15 @@ int udf_expand_file_adinicb(struct inode *inode)
 			iinfo->i_alloc_type = ICBTAG_FLAG_AD_LONG;
 		/* from now on we have normal address_space methods */
 		inode->i_data.a_ops = &udf_aops;
+		up_write(&iinfo->i_data_sem);
 		mark_inode_dirty(inode);
 		return 0;
 	}
+	/*
+	 * Release i_data_sem so that we can lock a page - page lock ranks
+	 * above i_data_sem. i_mutex still protects us against file changes.
+	 */
+	up_write(&iinfo->i_data_sem);
 
 	page = find_or_create_page(inode->i_mapping, 0, GFP_NOFS);
 	if (!page)
@@ -181,6 +193,7 @@ int udf_expand_file_adinicb(struct inode *inode)
 		SetPageUptodate(page);
 		kunmap(page);
 	}
+	down_write(&iinfo->i_data_sem);
 	memset(iinfo->i_ext.i_data + iinfo->i_lenEAttr, 0x00,
 	       iinfo->i_lenAlloc);
 	iinfo->i_lenAlloc = 0;
@@ -190,17 +203,20 @@ int udf_expand_file_adinicb(struct inode *inode)
 		iinfo->i_alloc_type = ICBTAG_FLAG_AD_LONG;
 	/* from now on we have normal address_space methods */
 	inode->i_data.a_ops = &udf_aops;
+	up_write(&iinfo->i_data_sem);
 	err = inode->i_data.a_ops->writepage(page, &udf_wbc);
 	if (err) {
 		/* Restore everything back so that we don't lose data... */
 		lock_page(page);
 		kaddr = kmap(page);
+		down_write(&iinfo->i_data_sem);
 		memcpy(iinfo->i_ext.i_data + iinfo->i_lenEAttr, kaddr,
 		       inode->i_size);
 		kunmap(page);
 		unlock_page(page);
 		iinfo->i_alloc_type = ICBTAG_FLAG_AD_IN_ICB;
 		inode->i_data.a_ops = &udf_adinicb_aops;
+		up_write(&iinfo->i_data_sem);
 	}
 	page_cache_release(page);
 	mark_inode_dirty(inode);
@@ -1105,10 +1121,9 @@ int udf_setsize(struct inode *inode, loff_t newsize)
 			if (bsize <
 			    (udf_file_entry_alloc_offset(inode) + newsize)) {
 				err = udf_expand_file_adinicb(inode);
-				if (err) {
-					up_write(&iinfo->i_data_sem);
+				if (err)
 					return err;
-				}
+				down_write(&iinfo->i_data_sem);
 			} else
 				iinfo->i_lenAlloc = newsize;
 		}
diff --git a/fs/udf/super.c b/fs/udf/super.c
index 7b27b06..7f0e18a 100644
--- a/fs/udf/super.c
+++ b/fs/udf/super.c
@@ -1830,6 +1830,12 @@ static void udf_close_lvid(struct super_block *sb)
 				le16_to_cpu(lvid->descTag.descCRCLength)));
 
 	lvid->descTag.tagChecksum = udf_tag_checksum(&lvid->descTag);
+	/*
+	 * We set buffer uptodate unconditionally here to avoid spurious
+	 * warnings from mark_buffer_dirty() when previous EIO has marked
+	 * the buffer as !uptodate
+	 */
+	set_buffer_uptodate(bh);
 	mark_buffer_dirty(bh);
 	sbi->s_lvid_dirty = 0;
 	mutex_unlock(&sbi->s_alloc_mutex);