Merge Linus master into drm-next

The merge is clean, but the arm build fails afterwards,
due to API changes in the regulator tree.

I've included the patch into the merge to fix the build.

Signed-off-by: Dave Airlie <airlied@redhat.com>

1 files changed, 35 insertions, 42 deletions

diff --git a/fs/ext4/file.c b/fs/ext4/file.c
index 33a09da16c9c..0613c256c344 100644
--- a/fs/ext4/file.c
+++ b/fs/ext4/file.c
@@ -20,12 +20,11 @@
 
 #include <linux/time.h>
 #include <linux/fs.h>
-#include <linux/jbd2.h>
 #include <linux/mount.h>
 #include <linux/path.h>
-#include <linux/aio.h>
 #include <linux/quotaops.h>
 #include <linux/pagevec.h>
+#include <linux/uio.h>
 #include "ext4.h"
 #include "ext4_jbd2.h"
 #include "xattr.h"
@@ -95,11 +94,9 @@ ext4_file_write_iter(struct kiocb *iocb, struct iov_iter *from)
 	struct inode *inode = file_inode(iocb->ki_filp);
 	struct mutex *aio_mutex = NULL;
 	struct blk_plug plug;
-	int o_direct = io_is_direct(file);
+	int o_direct = iocb->ki_flags & IOCB_DIRECT;
 	int overwrite = 0;
-	size_t length = iov_iter_count(from);
 	ssize_t ret;
-	loff_t pos = iocb->ki_pos;
 
 	/*
 	 * Unaligned direct AIO must be serialized; see comment above
@@ -108,16 +105,17 @@ ext4_file_write_iter(struct kiocb *iocb, struct iov_iter *from)
 	if (o_direct &&
 	    ext4_test_inode_flag(inode, EXT4_INODE_EXTENTS) &&
 	    !is_sync_kiocb(iocb) &&
-	    (file->f_flags & O_APPEND ||
-	     ext4_unaligned_aio(inode, from, pos))) {
+	    (iocb->ki_flags & IOCB_APPEND ||
+	     ext4_unaligned_aio(inode, from, iocb->ki_pos))) {
 		aio_mutex = ext4_aio_mutex(inode);
 		mutex_lock(aio_mutex);
 		ext4_unwritten_wait(inode);
 	}
 
 	mutex_lock(&inode->i_mutex);
-	if (file->f_flags & O_APPEND)
-		iocb->ki_pos = pos = i_size_read(inode);
+	ret = generic_write_checks(iocb, from);
+	if (ret <= 0)
+		goto out;
 
 	/*
 	 * If we have encountered a bitmap-format file, the size limit
@@ -126,22 +124,19 @@ ext4_file_write_iter(struct kiocb *iocb, struct iov_iter *from)
 	if (!(ext4_test_inode_flag(inode, EXT4_INODE_EXTENTS))) {
 		struct ext4_sb_info *sbi = EXT4_SB(inode->i_sb);
 
-		if ((pos > sbi->s_bitmap_maxbytes) ||
-		    (pos == sbi->s_bitmap_maxbytes && length > 0)) {
-			mutex_unlock(&inode->i_mutex);
+		if (iocb->ki_pos >= sbi->s_bitmap_maxbytes) {
 			ret = -EFBIG;
-			goto errout;
+			goto out;
 		}
-
-		if (pos + length > sbi->s_bitmap_maxbytes)
-			iov_iter_truncate(from, sbi->s_bitmap_maxbytes - pos);
+		iov_iter_truncate(from, sbi->s_bitmap_maxbytes - iocb->ki_pos);
 	}
 
 	iocb->private = &overwrite;
 	if (o_direct) {
+		size_t length = iov_iter_count(from);
+		loff_t pos = iocb->ki_pos;
 		blk_start_plug(&plug);
 
-
 		/* check whether we do a DIO overwrite or not */
 		if (ext4_should_dioread_nolock(inode) && !aio_mutex &&
 		    !file->f_mapping->nrpages && pos + length <= i_size_read(inode)) {
@@ -185,7 +180,12 @@ ext4_file_write_iter(struct kiocb *iocb, struct iov_iter *from)
 	if (o_direct)
 		blk_finish_plug(&plug);
 
-errout:
+	if (aio_mutex)
+		mutex_unlock(aio_mutex);
+	return ret;
+
+out:
+	mutex_unlock(&inode->i_mutex);
 	if (aio_mutex)
 		mutex_unlock(aio_mutex);
 	return ret;
@@ -206,6 +206,7 @@ static int ext4_dax_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf)
 static const struct vm_operations_struct ext4_dax_vm_ops = {
 	.fault		= ext4_dax_fault,
 	.page_mkwrite	= ext4_dax_mkwrite,
+	.pfn_mkwrite	= dax_pfn_mkwrite,
 };
 #else
 #define ext4_dax_vm_ops	ext4_file_vm_ops
@@ -219,6 +220,13 @@ static const struct vm_operations_struct ext4_file_vm_ops = {
 
 static int ext4_file_mmap(struct file *file, struct vm_area_struct *vma)
 {
+	struct inode *inode = file->f_mapping->host;
+
+	if (ext4_encrypted_inode(inode)) {
+		int err = ext4_generate_encryption_key(inode);
+		if (err)
+			return 0;
+	}
 	file_accessed(file);
 	if (IS_DAX(file_inode(file))) {
 		vma->vm_ops = &ext4_dax_vm_ops;
@@ -236,6 +244,7 @@ static int ext4_file_open(struct inode * inode, struct file * filp)
 	struct vfsmount *mnt = filp->f_path.mnt;
 	struct path path;
 	char buf[64], *cp;
+	int ret;
 
 	if (unlikely(!(sbi->s_mount_flags & EXT4_MF_MNTDIR_SAMPLED) &&
 		     !(sb->s_flags & MS_RDONLY))) {
@@ -274,11 +283,17 @@ static int ext4_file_open(struct inode * inode, struct file * filp)
 	 * writing and the journal is present
 	 */
 	if (filp->f_mode & FMODE_WRITE) {
-		int ret = ext4_inode_attach_jinode(inode);
+		ret = ext4_inode_attach_jinode(inode);
 		if (ret < 0)
 			return ret;
 	}
-	return dquot_file_open(inode, filp);
+	ret = dquot_file_open(inode, filp);
+	if (!ret && ext4_encrypted_inode(inode)) {
+		ret = ext4_generate_encryption_key(inode);
+		if (ret)
+			ret = -EACCES;
+	}
+	return ret;
 }
 
 /*
@@ -607,8 +622,6 @@ loff_t ext4_llseek(struct file *file, loff_t offset, int whence)
 
 const struct file_operations ext4_file_operations = {
 	.llseek		= ext4_llseek,
-	.read		= new_sync_read,
-	.write		= new_sync_write,
 	.read_iter	= generic_file_read_iter,
 	.write_iter	= ext4_file_write_iter,
 	.unlocked_ioctl = ext4_ioctl,
@@ -624,26 +637,6 @@ const struct file_operations ext4_file_operations = {
 	.fallocate	= ext4_fallocate,
 };
 
-#ifdef CONFIG_FS_DAX
-const struct file_operations ext4_dax_file_operations = {
-	.llseek		= ext4_llseek,
-	.read		= new_sync_read,
-	.write		= new_sync_write,
-	.read_iter	= generic_file_read_iter,
-	.write_iter	= ext4_file_write_iter,
-	.unlocked_ioctl = ext4_ioctl,
-#ifdef CONFIG_COMPAT
-	.compat_ioctl	= ext4_compat_ioctl,
-#endif
-	.mmap		= ext4_file_mmap,
-	.open		= ext4_file_open,
-	.release	= ext4_release_file,
-	.fsync		= ext4_sync_file,
-	/* Splice not yet supported with DAX */
-	.fallocate	= ext4_fallocate,
-};
-#endif
-
 const struct inode_operations ext4_file_inode_operations = {
 	.setattr	= ext4_setattr,
 	.getattr	= ext4_getattr,