scsi: treewide: Consolidate {get,put}_unaligned_[bl]e24() definitions

Move the get_unaligned_be24(), get_unaligned_le24() and
put_unaligned_le24() definitions from various drivers into
include/linux/unaligned/generic.h. Add a put_unaligned_be24()
implementation.

Link: https://lore.kernel.org/r/[e-mail]
Cc: Keith Busch <[e-mail]>
Cc: Sagi Grimberg <[e-mail]>
Cc: Jens Axboe <[e-mail]>
Cc: Harvey Harrison <[e-mail]>
Cc: Martin K. Petersen <[e-mail]>
Cc: Ingo Molnar <[e-mail]>
Cc: Thomas Gleixner <[e-mail]>
Cc: H. Peter Anvin <[e-mail]>
Cc: Andrew Morton <[e-mail]>
Reviewed-by: Christoph Hellwig <[e-mail]>
Reviewed-by: Andy Shevchenko <[e-mail]>
Reviewed-by: Greg Kroah-Hartman <[e-mail]> # For drivers/usb
Reviewed-by: Felipe Balbi <[e-mail]> # For drivers/usb/gadget
Signed-off-by: Bart Van Assche <[e-mail]>
Signed-off-by: Martin K. Petersen <[e-mail]>

drivers/nvme/host/rdma.c

···
 static const struct blk_mq_ops nvme_rdma_mq_ops;
 static const struct blk_mq_ops nvme_rdma_admin_mq_ops;
 
-/* XXX: really should move to a generic header sooner or later.. */
-static inline void put_unaligned_le24(u32 val, u8 *p)
-{
-	*p++ = val;
-	*p++ = val >> 8;
-	*p++ = val >> 16;
-}
-
 static inline int nvme_rdma_queue_idx(struct nvme_rdma_queue *queue)
 {
 	return queue - queue->ctrl->queues;

drivers/nvme/target/rdma.c

···
 	return 1 + (((len - 1) & PAGE_MASK) >> PAGE_SHIFT);
 }
 
-/* XXX: really should move to a generic header sooner or later.. */
-static inline u32 get_unaligned_le24(const u8 *p)
-{
-	return (u32)p[0] | (u32)p[1] << 8 | (u32)p[2] << 16;
-}
-
 static inline bool nvmet_rdma_need_data_in(struct nvmet_rdma_rsp *rsp)
 {
 	return nvme_is_write(rsp->req.cmd) &&

drivers/usb/gadget/function/f_mass_storage.c

···
 #include <linux/freezer.h>
 #include <linux/module.h>
 #include <linux/uaccess.h>
+#include <asm/unaligned.h>
 
 #include <linux/usb/ch9.h>
 #include <linux/usb/gadget.h>

drivers/usb/gadget/function/storage_common.h

···
 	DATA_DIR_NONE
 };
 
-static inline u32 get_unaligned_be24(u8 *buf)
-{
-	return 0xffffff & (u32) get_unaligned_be32(buf - 1);
-}
-
 static inline struct fsg_lun *fsg_lun_from_dev(struct device *dev)
 {
 	return container_of(dev, struct fsg_lun, dev);

include/linux/unaligned/generic.h

···
 #ifndef _LINUX_UNALIGNED_GENERIC_H
 #define _LINUX_UNALIGNED_GENERIC_H
 
+#include <linux/types.h>
+
 /*
  * Cause a link-time error if we try an unaligned access other than
  * 1,2,4 or 8 bytes long
···
 		break;							\
 	}								\
 	(void)0; })
+
+static inline u32 __get_unaligned_be24(const u8 *p)
+{
+	return p[0] << 16 | p[1] << 8 | p[2];
+}
+
+static inline u32 get_unaligned_be24(const void *p)
+{
+	return __get_unaligned_be24(p);
+}
+
+static inline u32 __get_unaligned_le24(const u8 *p)
+{
+	return p[0] | p[1] << 8 | p[2] << 16;
+}
+
+static inline u32 get_unaligned_le24(const void *p)
+{
+	return __get_unaligned_le24(p);
+}
+
+static inline void __put_unaligned_be24(const u32 val, u8 *p)
+{
+	*p++ = val >> 16;
+	*p++ = val >> 8;
+	*p++ = val;
+}
+
+static inline void put_unaligned_be24(const u32 val, void *p)
+{
+	__put_unaligned_be24(val, p);
+}
+
+static inline void __put_unaligned_le24(const u32 val, u8 *p)
+{
+	*p++ = val;
+	*p++ = val >> 8;
+	*p++ = val >> 16;
+}
+
+static inline void put_unaligned_le24(const u32 val, void *p)
+{
+	__put_unaligned_le24(val, p);
+}
 
 #endif /* _LINUX_UNALIGNED_GENERIC_H */

include/target/target_core_backend.h

···
 	return !!(se_dev->dev_flags & DF_CONFIGURED);
 }
 
-/* Only use get_unaligned_be24() if reading p - 1 is allowed. */
-static inline uint32_t get_unaligned_be24(const uint8_t *const p)
-{
-	return get_unaligned_be32(p - 1) & 0xffffffU;
-}
-
 #endif /* TARGET_CORE_BACKEND_H */