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[02/24] scsi: core: Make scsi_cmd_priv() accept const arguments

Message ID 20250403211937.2225615-3-bvanassche@acm.org
State New
Headers show
Series Optimize the hot path in the UFS driver | expand

Commit Message

Bart Van Assche April 3, 2025, 9:17 p.m. UTC 
Instead of requiring the caller to cast away constness, make
scsi_cmd_priv() accept const arguments.

Cc: Hannes Reinecke <hare@suse.de>
Cc: John Garry <john.g.garry@oracle.com>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
---
 include/scsi/scsi_cmnd.h | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)
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Patch

diff --git a/include/scsi/scsi_cmnd.h b/include/scsi/scsi_cmnd.h
index 154fbb39ca0c..09176b07e891 100644
--- a/include/scsi/scsi_cmnd.h
+++ b/include/scsi/scsi_cmnd.h
@@ -154,10 +154,10 @@  struct scsi_cmnd {
  * Return the driver private allocation behind the command.
  * Only works if cmd_size is set in the host template.
  */
-static inline void *scsi_cmd_priv(struct scsi_cmnd *cmd)
-{
-	return cmd + 1;
-}
+#define scsi_cmd_priv(cmd)                                         \
+	_Generic(cmd,                                              \
+		const struct scsi_cmnd *: (const void *)(cmd + 1), \
+		struct scsi_cmnd *: (void *)(cmd + 1))
 
 void scsi_done(struct scsi_cmnd *cmd);
 void scsi_done_direct(struct scsi_cmnd *cmd);