diff mbox series

[v1,1/2] device property: Get rid of __PROPERTY_ENTRY_ARRAY_EL*SIZE*()

Message ID 20221104154849.35177-1-andriy.shevchenko@linux.intel.com
State Superseded
Headers show
Series [v1,1/2] device property: Get rid of __PROPERTY_ENTRY_ARRAY_EL*SIZE*() | expand

Commit Message

Andy Shevchenko Nov. 4, 2022, 3:48 p.m. UTC 
First of all, _ELEMENT_SIZE() repeats existing sizeof_field() macro.
Second, usage of _ARRAY_ELSIZE_LEN() adds unnecessary indirection
to the data layout. It's more understandable when the data structure
is placed explicitly. That said, get rid of those macros by replacing
them with the existing helper and explicit data structure layout.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
---
 include/linux/property.h | 34 ++++++++++++++--------------------
 1 file changed, 14 insertions(+), 20 deletions(-)

Comments

Andy Shevchenko Nov. 4, 2022, 5:35 p.m. UTC | #1 
On Fri, Nov 04, 2022 at 05:48:48PM +0200, Andy Shevchenko wrote:
> First of all, _ELEMENT_SIZE() repeats existing sizeof_field() macro.
> Second, usage of _ARRAY_ELSIZE_LEN() adds unnecessary indirection
> to the data layout. It's more understandable when the data structure
> is placed explicitly. That said, get rid of those macros by replacing
> them with the existing helper and explicit data structure layout.

...

> +(struct property_entry) {						\
> +	.name = _name_,							\
> +	.length = (_len_) * sizeof(struct software_node_ref_args),	\
> +	.type = DEV_PROP_##_Type_,					\

> +	.pointer = _val_,						\

While waiting for the comments, I have noticed missed {} here. I haven't
checked if gcc 5.1 still requires that, but in any case that should be matter
of a separate patch (to drop {} for anonymous union members initialization).

That said, v2 will occur if no serious objection is provided.

> +}
diff mbox series

Patch

diff --git a/include/linux/property.h b/include/linux/property.h
index ccc73399c9ea..df3f16d23d0c 100644
--- a/include/linux/property.h
+++ b/include/linux/property.h
@@ -12,6 +12,7 @@ 
 
 #include <linux/bits.h>
 #include <linux/fwnode.h>
+#include <linux/stddef.h>
 #include <linux/types.h>
 
 struct device;
@@ -310,24 +311,14 @@  struct property_entry {
  * crafted to avoid gcc-4.4.4's problems with initialization of anon unions
  * and structs.
  */
-
-#define __PROPERTY_ENTRY_ELEMENT_SIZE(_elem_)				\
-	sizeof(((struct property_entry *)NULL)->value._elem_[0])
-
-#define __PROPERTY_ENTRY_ARRAY_ELSIZE_LEN(_name_, _elsize_, _Type_,	\
-					  _val_, _len_)			\
-(struct property_entry) {						\
-	.name = _name_,							\
-	.length = (_len_) * (_elsize_),					\
-	.type = DEV_PROP_##_Type_,					\
-	{ .pointer = _val_ },						\
+#define __PROPERTY_ENTRY_ARRAY_LEN(_name_, _elem_, _Type_, _val_, _len_)		\
+(struct property_entry) {								\
+	.name = _name_,									\
+	.length = (_len_) * sizeof_field(struct property_entry, value._elem_[0]),	\
+	.type = DEV_PROP_##_Type_,							\
+	{ .pointer = _val_ },								\
 }
 
-#define __PROPERTY_ENTRY_ARRAY_LEN(_name_, _elem_, _Type_, _val_, _len_)\
-	__PROPERTY_ENTRY_ARRAY_ELSIZE_LEN(_name_,			\
-				__PROPERTY_ENTRY_ELEMENT_SIZE(_elem_),	\
-				_Type_, _val_, _len_)
-
 #define PROPERTY_ENTRY_U8_ARRAY_LEN(_name_, _val_, _len_)		\
 	__PROPERTY_ENTRY_ARRAY_LEN(_name_, u8_data, U8, _val_, _len_)
 #define PROPERTY_ENTRY_U16_ARRAY_LEN(_name_, _val_, _len_)		\
@@ -339,9 +330,12 @@  struct property_entry {
 #define PROPERTY_ENTRY_STRING_ARRAY_LEN(_name_, _val_, _len_)		\
 	__PROPERTY_ENTRY_ARRAY_LEN(_name_, str, STRING, _val_, _len_)
 #define PROPERTY_ENTRY_REF_ARRAY_LEN(_name_, _val_, _len_)		\
-	__PROPERTY_ENTRY_ARRAY_ELSIZE_LEN(_name_,			\
-				sizeof(struct software_node_ref_args),	\
-				REF, _val_, _len_)
+(struct property_entry) {						\
+	.name = _name_,							\
+	.length = (_len_) * sizeof(struct software_node_ref_args),	\
+	.type = DEV_PROP_##_Type_,					\
+	.pointer = _val_,						\
+}
 
 #define PROPERTY_ENTRY_U8_ARRAY(_name_, _val_)				\
 	PROPERTY_ENTRY_U8_ARRAY_LEN(_name_, _val_, ARRAY_SIZE(_val_))
@@ -359,7 +353,7 @@  struct property_entry {
 #define __PROPERTY_ENTRY_ELEMENT(_name_, _elem_, _Type_, _val_)		\
 (struct property_entry) {						\
 	.name = _name_,							\
-	.length = __PROPERTY_ENTRY_ELEMENT_SIZE(_elem_),		\
+	.length = sizeof_field(struct property_entry, value._elem_[0]),	\
 	.is_inline = true,						\
 	.type = DEV_PROP_##_Type_,					\
 	{ .value = { ._elem_[0] = _val_ } },				\