diff -- a/drivers/xen/xen-front-pgdir-shbuf.c b/drivers/xen/xen-front-pgdir-shbuf.c
--- a/drivers/xen/xen-front-pgdir-shbuf.c
+++ b/drivers/xen/xen-front-pgdir-shbuf.c
@@ -21,7 +21,7 @@
 
 #include <xen/xen-front-pgdir-shbuf.h>
 
-/**
+/*
  * This structure represents the structure of a shared page
  * that contains grant references to the pages of the shared
  * buffer. This structure is common to many Xen para-virtualized
@@ -33,7 +33,7 @@ struct xen_page_directory {
 	grant_ref_t gref[]; /* Variable length */
 };
 
-/**
+/*
  * Shared buffer ops which are differently implemented
  * depending on the allocation mode, e.g. if the buffer
  * is allocated by the corresponding backend or frontend.
@@ -61,7 +61,7 @@ struct xen_front_pgdir_shbuf_ops {
 	int (*unmap)(struct xen_front_pgdir_shbuf *buf);
 };
 
-/**
+/*
  * Get granted reference to the very first page of the
  * page directory. Usually this is passed to the backend,
  * so it can find/fill the grant references to the buffer's
@@ -81,7 +81,7 @@ xen_front_pgdir_shbuf_get_dir_start(stru
 }
 EXPORT_SYMBOL_GPL(xen_front_pgdir_shbuf_get_dir_start);
 
-/**
+/*
  * Map granted references of the shared buffer.
  *
  * Depending on the shared buffer mode of allocation
@@ -102,7 +102,7 @@ int xen_front_pgdir_shbuf_map(struct xen
 }
 EXPORT_SYMBOL_GPL(xen_front_pgdir_shbuf_map);
 
-/**
+/*
  * Unmap granted references of the shared buffer.
  *
  * Depending on the shared buffer mode of allocation
@@ -123,7 +123,7 @@ int xen_front_pgdir_shbuf_unmap(struct x
 }
 EXPORT_SYMBOL_GPL(xen_front_pgdir_shbuf_unmap);
 
-/**
+/*
  * Free all the resources of the shared buffer.
  *
  * \param buf shared buffer which resources to be freed.
@@ -150,7 +150,7 @@ EXPORT_SYMBOL_GPL(xen_front_pgdir_shbuf_
 				 offsetof(struct xen_page_directory, \
 					  gref)) / sizeof(grant_ref_t))
 
-/**
+/*
  * Get the number of pages the page directory consumes itself.
  *
  * \param buf shared buffer.
@@ -160,7 +160,7 @@ static int get_num_pages_dir(struct xen_
 	return DIV_ROUND_UP(buf->num_pages, XEN_NUM_GREFS_PER_PAGE);
 }
 
-/**
+/*
  * Calculate the number of grant references needed to share the buffer
  * and its pages when backend allocates the buffer.
  *
@@ -172,7 +172,7 @@ static void backend_calc_num_grefs(struc
 	buf->num_grefs = get_num_pages_dir(buf);
 }
 
-/**
+/*
  * Calculate the number of grant references needed to share the buffer
  * and its pages when frontend allocates the buffer.
  *
@@ -190,7 +190,7 @@ static void guest_calc_num_grefs(struct
 #define xen_page_to_vaddr(page) \
 	((uintptr_t)pfn_to_kaddr(page_to_xen_pfn(page)))
 
-/**
+/*
  * Unmap the buffer previously mapped with grant references
  * provided by the backend.
  *
@@ -238,7 +238,7 @@ static int backend_unmap(struct xen_fron
 	return ret;
 }
 
-/**
+/*
  * Map the buffer with grant references provided by the backend.
  *
  * \param buf shared buffer.
@@ -320,7 +320,7 @@ static int backend_map(struct xen_front_
 	return ret;
 }
 
-/**
+/*
  * Fill page directory with grant references to the pages of the
  * page directory itself.
  *
@@ -350,7 +350,7 @@ static void backend_fill_page_dir(struct
 	page_dir->gref_dir_next_page = XEN_GREF_LIST_END;
 }
 
-/**
+/*
  * Fill page directory with grant references to the pages of the
  * page directory and the buffer we share with the backend.
  *
@@ -389,7 +389,7 @@ static void guest_fill_page_dir(struct x
 	}
 }
 
-/**
+/*
  * Grant references to the frontend's buffer pages.
  *
  * These will be shared with the backend, so it can
@@ -418,7 +418,7 @@ static int guest_grant_refs_for_buffer(s
 	return 0;
 }
 
-/**
+/*
  * Grant all the references needed to share the buffer.
  *
  * Grant references to the page directory pages and, if
@@ -466,7 +466,7 @@ static int grant_references(struct xen_f
 	return 0;
 }
 
-/**
+/*
  * Allocate all required structures to mange shared buffer.
  *
  * \param buf shared buffer.
@@ -506,7 +506,7 @@ static const struct xen_front_pgdir_shbu
 	.grant_refs_for_buffer = guest_grant_refs_for_buffer,
 };
 
-/**
+/*
  * Allocate a new instance of a shared buffer.
  *
  * \param cfg configuration to be used while allocating a new shared buffer.
