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-rw-r--r--fs/ext2/file.c34
1 files changed, 32 insertions, 2 deletions
diff --git a/fs/ext2/file.c b/fs/ext2/file.c
index a247123..a61c93f 100644
--- a/fs/ext2/file.c
+++ b/fs/ext2/file.c
@@ -25,6 +25,36 @@
#include "xattr.h"
#include "acl.h"
+#ifdef CONFIG_EXT2_FS_XIP
+static int ext2_dax_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
+{
+ return dax_fault(vma, vmf, ext2_get_block);
+}
+
+static int ext2_dax_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf)
+{
+ return dax_mkwrite(vma, vmf, ext2_get_block);
+}
+
+static const struct vm_operations_struct ext2_dax_vm_ops = {
+ .fault = ext2_dax_fault,
+ .page_mkwrite = ext2_dax_mkwrite,
+};
+
+static int ext2_file_mmap(struct file *file, struct vm_area_struct *vma)
+{
+ if (!IS_DAX(file_inode(file)))
+ return generic_file_mmap(file, vma);
+
+ file_accessed(file);
+ vma->vm_ops = &ext2_dax_vm_ops;
+ vma->vm_flags |= VM_MIXEDMAP;
+ return 0;
+}
+#else
+#define ext2_file_mmap generic_file_mmap
+#endif
+
/*
* Called when filp is released. This happens when all file descriptors
* for a single struct file are closed. Note that different open() calls
@@ -70,7 +100,7 @@ const struct file_operations ext2_file_operations = {
#ifdef CONFIG_COMPAT
.compat_ioctl = ext2_compat_ioctl,
#endif
- .mmap = generic_file_mmap,
+ .mmap = ext2_file_mmap,
.open = dquot_file_open,
.release = ext2_release_file,
.fsync = ext2_fsync,
@@ -89,7 +119,7 @@ const struct file_operations ext2_xip_file_operations = {
#ifdef CONFIG_COMPAT
.compat_ioctl = ext2_compat_ioctl,
#endif
- .mmap = xip_file_mmap,
+ .mmap = ext2_file_mmap,
.open = dquot_file_open,
.release = ext2_release_file,
.fsync = ext2_fsync,
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