Variable Length Array macros allow portable (compilable with both gcc
and clang) way of allocating a number of structures using a single
memory chunk. They can be useful for files other than f_fs.c,
so move them to a header file.
Signed-off-by: Andrzej Pietrasiewicz <andrze...@samsung.com>
---
drivers/usb/gadget/f_fs.c | 27 +--------------------------
drivers/usb/gadget/u_f.h | 26 ++++++++++++++++++++++++++
2 files changed, 27 insertions(+), 26 deletions(-)
diff --git a/drivers/usb/gadget/f_fs.c b/drivers/usb/gadget/f_fs.c
index 1e12b3e..be2983a 100644
--- a/drivers/usb/gadget/f_fs.c
+++ b/drivers/usb/gadget/f_fs.c
@@ -33,36 +33,11 @@
#include <linux/poll.h>
#include "u_fs.h"
+#include "u_f.h"
#include "configfs.h"
#define FUNCTIONFS_MAGIC 0xa647361 /* Chosen by a honest dice roll ;) */
-/* Variable Length Array Macros **********************************************/
-#define vla_group(groupname) size_t groupname##__next = 0
-#define vla_group_size(groupname) groupname##__next
-
-#define vla_item(groupname, type, name, n) \
- size_t groupname##_##name##__offset = ({ \
- size_t align_mask = __alignof__(type) - 1; \
- size_t offset = (groupname##__next + align_mask) & ~align_mask;\
- size_t size = (n) * sizeof(type); \
- groupname##__next = offset + size; \
- offset; \
- })
-
-#define vla_item_with_sz(groupname, type, name, n) \
- size_t groupname##_##name##__sz = (n) * sizeof(type); \
- size_t groupname##_##name##__offset = ({ \
- size_t align_mask = __alignof__(type) - 1; \
- size_t offset = (groupname##__next + align_mask) & ~align_mask;\
- size_t size = groupname##_##name##__sz; \
- groupname##__next = offset + size; \
- offset; \
- })
-
-#define vla_ptr(ptr, groupname, name) \
- ((void *) ((char *)ptr + groupname##_##name##__offset))
-
/* Reference counter handling */
static void ffs_data_get(struct ffs_data *ffs);
static void ffs_data_put(struct ffs_data *ffs);
diff --git a/drivers/usb/gadget/u_f.h b/drivers/usb/gadget/u_f.h
index 71034c0..1d5f0eb 100644
--- a/drivers/usb/gadget/u_f.h
+++ b/drivers/usb/gadget/u_f.h
@@ -16,6 +16,32 @@
#ifndef __U_F_H__
#define __U_F_H__
+/* Variable Length Array Macros **********************************************/
+#define vla_group(groupname) size_t groupname##__next = 0
+#define vla_group_size(groupname) groupname##__next
+
+#define vla_item(groupname, type, name, n) \
+ size_t groupname##_##name##__offset = ({ \
+ size_t align_mask = __alignof__(type) - 1; \
+ size_t offset = (groupname##__next + align_mask) & ~align_mask;\
+ size_t size = (n) * sizeof(type); \
+ groupname##__next = offset + size; \
+ offset; \
+ })
+
+#define vla_item_with_sz(groupname, type, name, n) \
+ size_t groupname##_##name##__sz = (n) * sizeof(type); \
+ size_t groupname##_##name##__offset = ({ \
+ size_t align_mask = __alignof__(type) - 1; \
+ size_t offset = (groupname##__next + align_mask) & ~align_mask;\
+ size_t size = groupname##_##name##__sz; \
+ groupname##__next = offset + size; \
+ offset; \
+ })
+
+#define vla_ptr(ptr, groupname, name) \
+ ((void *) ((char *)ptr + groupname##_##name##__offset))
+
struct usb_ep;
struct usb_request;
--
1.8.3.2
--
To unsubscribe from this list: send the line "unsubscribe linux-usb" in
the body of a message to majord...@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
