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-rw-r--r--fs/dax.c45
1 files changed, 32 insertions, 13 deletions
diff --git a/fs/dax.c b/fs/dax.c
index f955c0df33bb..c3c29fbf64be 100644
--- a/fs/dax.c
+++ b/fs/dax.c
@@ -1118,16 +1118,8 @@ static int dax_fault_return(int error)
return VM_FAULT_SIGBUS;
}
-/**
- * dax_iomap_fault - handle a page fault on a DAX file
- * @vmf: The description of the fault
- * @ops: iomap ops passed from the file system
- *
- * When a page fault occurs, filesystems may call this helper in their fault
- * or mkwrite handler for DAX files. Assumes the caller has done all the
- * necessary locking for the page fault to proceed successfully.
- */
-int dax_iomap_fault(struct vm_fault *vmf, const struct iomap_ops *ops)
+static int dax_iomap_pte_fault(struct vm_fault *vmf,
+ const struct iomap_ops *ops)
{
struct address_space *mapping = vmf->vma->vm_file->f_mapping;
struct inode *inode = mapping->host;
@@ -1244,7 +1236,6 @@ int dax_iomap_fault(struct vm_fault *vmf, const struct iomap_ops *ops)
}
return vmf_ret;
}
-EXPORT_SYMBOL_GPL(dax_iomap_fault);
#ifdef CONFIG_FS_DAX_PMD
/*
@@ -1335,7 +1326,8 @@ fallback:
return VM_FAULT_FALLBACK;
}
-int dax_iomap_pmd_fault(struct vm_fault *vmf, const struct iomap_ops *ops)
+static int dax_iomap_pmd_fault(struct vm_fault *vmf,
+ const struct iomap_ops *ops)
{
struct vm_area_struct *vma = vmf->vma;
struct address_space *mapping = vma->vm_file->f_mapping;
@@ -1443,5 +1435,32 @@ out:
trace_dax_pmd_fault_done(inode, vmf, max_pgoff, result);
return result;
}
-EXPORT_SYMBOL_GPL(dax_iomap_pmd_fault);
+#else
+static int dax_iomap_pmd_fault(struct vm_fault *vmf, struct iomap_ops *ops)
+{
+ return VM_FAULT_FALLBACK;
+}
#endif /* CONFIG_FS_DAX_PMD */
+
+/**
+ * dax_iomap_fault - handle a page fault on a DAX file
+ * @vmf: The description of the fault
+ * @ops: iomap ops passed from the file system
+ *
+ * When a page fault occurs, filesystems may call this helper in
+ * their fault handler for DAX files. dax_iomap_fault() assumes the caller
+ * has done all the necessary locking for page fault to proceed
+ * successfully.
+ */
+int dax_iomap_fault(struct vm_fault *vmf, const struct iomap_ops *ops)
+{
+ switch (vmf->flags & FAULT_FLAG_SIZE_MASK) {
+ case FAULT_FLAG_SIZE_PTE:
+ return dax_iomap_pte_fault(vmf, ops);
+ case FAULT_FLAG_SIZE_PMD:
+ return dax_iomap_pmd_fault(vmf, ops);
+ default:
+ return VM_FAULT_FALLBACK;
+ }
+}
+EXPORT_SYMBOL_GPL(dax_iomap_fault);