[PATCH v4 06/12] ext2, dax: replace IS_DAX() with IS_FSDAX()

[Dan Williams <dan.j.williams@xxxxxxxxx>]

In preparation for fixing the broken definition of S_DAX in the
CONFIG_FS_DAX=n + CONFIG_DEV_DAX=y case, convert all IS_DAX() usages to
use explicit tests for FSDAX since DAX is ambiguous.

Cc: Jan Kara <jack@xxxxxxxx>
Cc: Matthew Wilcox <mawilcox@xxxxxxxxxxxxx>
Cc: Ross Zwisler <ross.zwisler@xxxxxxxxxxxxxxx>
Cc: <stable@xxxxxxxxxxxxxxx>
Fixes: dee410792419 ("/dev/dax, core: file operations and dax-mmap")
Signed-off-by: Dan Williams <dan.j.williams@xxxxxxxxx>
---
 fs/ext2/file.c  |    6 +++---
 fs/ext2/inode.c |    6 +++---
 2 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/fs/ext2/file.c b/fs/ext2/file.c
index 5ac98d074323..702a36df6c01 100644
--- a/fs/ext2/file.c
+++ b/fs/ext2/file.c
@@ -119,7 +119,7 @@ static const struct vm_operations_struct ext2_dax_vm_ops = {
 
 static int ext2_file_mmap(struct file *file, struct vm_area_struct *vma)
 {
-	if (!IS_DAX(file_inode(file)))
+	if (!IS_FSDAX(file_inode(file)))
 		return generic_file_mmap(file, vma);
 
 	file_accessed(file);
@@ -158,14 +158,14 @@ int ext2_fsync(struct file *file, loff_t start, loff_t end, int datasync)
 
 static ssize_t ext2_file_read_iter(struct kiocb *iocb, struct iov_iter *to)
 {
-	if (IS_DAX(iocb->ki_filp->f_mapping->host))
+	if (IS_FSDAX(iocb->ki_filp->f_mapping->host))
 		return ext2_dax_read_iter(iocb, to);
 	return generic_file_read_iter(iocb, to);
 }
 
 static ssize_t ext2_file_write_iter(struct kiocb *iocb, struct iov_iter *from)
 {
-	if (IS_DAX(iocb->ki_filp->f_mapping->host))
+	if (IS_FSDAX(iocb->ki_filp->f_mapping->host))
 		return ext2_dax_write_iter(iocb, from);
 	return generic_file_write_iter(iocb, from);
 }
diff --git a/fs/ext2/inode.c b/fs/ext2/inode.c
index e04295e99d90..72284f9fd034 100644
--- a/fs/ext2/inode.c
+++ b/fs/ext2/inode.c
@@ -733,7 +733,7 @@ static int ext2_get_blocks(struct inode *inode,
 		goto cleanup;
 	}
 
-	if (IS_DAX(inode)) {
+	if (IS_FSDAX(inode)) {
 		/*
 		 * We must unmap blocks before zeroing so that writeback cannot
 		 * overwrite zeros with stale data from block device page cache.
@@ -940,7 +940,7 @@ ext2_direct_IO(struct kiocb *iocb, struct iov_iter *iter)
 	loff_t offset = iocb->ki_pos;
 	ssize_t ret;
 
-	if (WARN_ON_ONCE(IS_DAX(inode)))
+	if (WARN_ON_ONCE(IS_FSDAX(inode)))
 		return -EIO;
 
 	ret = blockdev_direct_IO(iocb, inode, iter, ext2_get_block);
@@ -1294,7 +1294,7 @@ static int ext2_setsize(struct inode *inode, loff_t newsize)
 
 	inode_dio_wait(inode);
 
-	if (IS_DAX(inode)) {
+	if (IS_FSDAX(inode)) {
 		error = iomap_zero_range(inode, newsize,
 					 PAGE_ALIGN(newsize) - newsize, NULL,
 					 &ext2_iomap_ops);