Merge tag 'sound-5.3-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai...

[linux-2.6-microblaze.git] / include / linux / dax.h

diff --git a/include/linux/dax.h b/include/linux/dax.h
index becaea5..9bd8528 100644 (file)
--- a/include/linux/dax.h
+++ b/include/linux/dax.h
@@ -7,6 +7,9 @@
 #include <linux/radix-tree.h>
 #include <asm/pgtable.h>
 
+/* Flag for synchronous flush */
+#define DAXDEV_F_SYNC (1UL << 0)
+
 typedef unsigned long dax_entry_t;
 
 struct iomap_ops;
@@ -38,18 +41,40 @@ extern struct attribute_group dax_attribute_group;
 #if IS_ENABLED(CONFIG_DAX)
 struct dax_device *dax_get_by_host(const char *host);
 struct dax_device *alloc_dax(void *private, const char *host,
-               const struct dax_operations *ops);
+               const struct dax_operations *ops, unsigned long flags);
 void put_dax(struct dax_device *dax_dev);
 void kill_dax(struct dax_device *dax_dev);
 void dax_write_cache(struct dax_device *dax_dev, bool wc);
 bool dax_write_cache_enabled(struct dax_device *dax_dev);
+bool __dax_synchronous(struct dax_device *dax_dev);
+static inline bool dax_synchronous(struct dax_device *dax_dev)
+{
+       return  __dax_synchronous(dax_dev);
+}
+void __set_dax_synchronous(struct dax_device *dax_dev);
+static inline void set_dax_synchronous(struct dax_device *dax_dev)
+{
+       __set_dax_synchronous(dax_dev);
+}
+/*
+ * Check if given mapping is supported by the file / underlying device.
+ */
+static inline bool daxdev_mapping_supported(struct vm_area_struct *vma,
+                                            struct dax_device *dax_dev)
+{
+       if (!(vma->vm_flags & VM_SYNC))
+               return true;
+       if (!IS_DAX(file_inode(vma->vm_file)))
+               return false;
+       return dax_synchronous(dax_dev);
+}
 #else
 static inline struct dax_device *dax_get_by_host(const char *host)
 {
        return NULL;
 }
 static inline struct dax_device *alloc_dax(void *private, const char *host,
-               const struct dax_operations *ops)
+               const struct dax_operations *ops, unsigned long flags)
 {
        /*
         * Callers should check IS_ENABLED(CONFIG_DAX) to know if this
@@ -70,6 +95,18 @@ static inline bool dax_write_cache_enabled(struct dax_device *dax_dev)
 {
        return false;
 }
+static inline bool dax_synchronous(struct dax_device *dax_dev)
+{
+       return true;
+}
+static inline void set_dax_synchronous(struct dax_device *dax_dev)
+{
+}
+static inline bool daxdev_mapping_supported(struct vm_area_struct *vma,
+                               struct dax_device *dax_dev)
+{
+       return !(vma->vm_flags & VM_SYNC);
+}
 #endif
 
 struct writeback_control;