types: move phys_vec definition to common header

Move the struct phys_vec definition from block/blk-mq-dma.c to
include/linux/types.h to make it available for use across the kernel.

The phys_vec structure represents a physical address range with a
length, which is used by the new physical address-based DMA mapping
API. This structure is already used by the block layer and will be
needed by upcoming VFIO patches for dma-buf operations.

Moving this definition to types.h provides a centralized location
for this common data structure and eliminates code duplication
across subsystems that need to work with physical address ranges.

Signed-off-by: Leon Romanovsky <[email protected]>

Author: rleon

block/blk-mq-dma.c

@@ -5,11 +5,6 @@
 #include <linux/blk-mq-dma.h>
 #include "blk.h"
 
-struct phys_vec {
-	phys_addr_t	paddr;
-	u32		len;
-};
-
 static bool blk_map_iter_next(struct request *req, struct req_iterator *iter,
 			      struct phys_vec *vec)
 {

include/linux/types.h

@@ -170,6 +170,11 @@ typedef u64 phys_addr_t;
 typedef u32 phys_addr_t;
 #endif
 
+struct phys_vec {
+	phys_addr_t	paddr;
+	u32		len;
+};
+
 typedef phys_addr_t resource_size_t;
 
 /*