scsi: sd: Make protection lookup tables static and relocate functions

Currently the protection lookup tables in sd_prot_flag_mask() and
sd_prot_op() are declared as non-static. As such, they will be rebuilt for
each respective function call.

Optimise by making them static.

This saves ~100B object code for sd.c:

Before:
text data bss dec hex filename
25403 1024 16 26443 674b drivers/scsi/sd.o

After:
text data bss dec hex filename
25299 1024 16 26339 66e3 drivers/scsi/sd.o

In addition, since those same functions are declared in sd.h, but each are
only referenced in sd.c, relocate them to that same c file.

The inline specifier is dropped also, since gcc should be able to make the
decision to inline.

Signed-off-by: John Garry <[e-mail]>
Reviewed-by: Bart Van Assche <[e-mail]>
Signed-off-by: Martin K. Petersen <[e-mail]>

drivers/scsi/sd.c

···
 }
 #endif /* CONFIG_BLK_SED_OPAL */
 
+/*
+ * Look up the DIX operation based on whether the command is read or
+ * write and whether dix and dif are enabled.
+ */
+static unsigned int sd_prot_op(bool write, bool dix, bool dif)
+{
+	/* Lookup table: bit 2 (write), bit 1 (dix), bit 0 (dif) */
+	static const unsigned int ops[] = {	/* wrt dix dif */
+		SCSI_PROT_NORMAL,		/*  0	0   0  */
+		SCSI_PROT_READ_STRIP,		/*  0	0   1  */
+		SCSI_PROT_READ_INSERT,		/*  0	1   0  */
+		SCSI_PROT_READ_PASS,		/*  0	1   1  */
+		SCSI_PROT_NORMAL,		/*  1	0   0  */
+		SCSI_PROT_WRITE_INSERT,		/*  1	0   1  */
+		SCSI_PROT_WRITE_STRIP,		/*  1	1   0  */
+		SCSI_PROT_WRITE_PASS,		/*  1	1   1  */
+	};
+
+	return ops[write << 2 | dix << 1 | dif];
+}
+
+/*
+ * Returns a mask of the protection flags that are valid for a given DIX
+ * operation.
+ */
+static unsigned int sd_prot_flag_mask(unsigned int prot_op)
+{
+	static const unsigned int flag_mask[] = {
+		[SCSI_PROT_NORMAL]		= 0,
+
+		[SCSI_PROT_READ_STRIP]		= SCSI_PROT_TRANSFER_PI |
+						  SCSI_PROT_GUARD_CHECK |
+						  SCSI_PROT_REF_CHECK |
+						  SCSI_PROT_REF_INCREMENT,
+
+		[SCSI_PROT_READ_INSERT]		= SCSI_PROT_REF_INCREMENT |
+						  SCSI_PROT_IP_CHECKSUM,
+
+		[SCSI_PROT_READ_PASS]		= SCSI_PROT_TRANSFER_PI |
+						  SCSI_PROT_GUARD_CHECK |
+						  SCSI_PROT_REF_CHECK |
+						  SCSI_PROT_REF_INCREMENT |
+						  SCSI_PROT_IP_CHECKSUM,
+
+		[SCSI_PROT_WRITE_INSERT]	= SCSI_PROT_TRANSFER_PI |
+						  SCSI_PROT_REF_INCREMENT,
+
+		[SCSI_PROT_WRITE_STRIP]		= SCSI_PROT_GUARD_CHECK |
+						  SCSI_PROT_REF_CHECK |
+						  SCSI_PROT_REF_INCREMENT |
+						  SCSI_PROT_IP_CHECKSUM,
+
+		[SCSI_PROT_WRITE_PASS]		= SCSI_PROT_TRANSFER_PI |
+						  SCSI_PROT_GUARD_CHECK |
+						  SCSI_PROT_REF_CHECK |
+						  SCSI_PROT_REF_INCREMENT |
+						  SCSI_PROT_IP_CHECKSUM,
+	};
+
+	return flag_mask[prot_op];
+}
+
 static unsigned char sd_setup_protect_cmnd(struct scsi_cmnd *scmd,
 					   unsigned int dix, unsigned int dif)
 {

drivers/scsi/sd.h

···
 	return sector >> (ilog2(sdev->sector_size) - 9);
 }
 
-/*
- * Look up the DIX operation based on whether the command is read or
- * write and whether dix and dif are enabled.
- */
-static inline unsigned int sd_prot_op(bool write, bool dix, bool dif)
-{
-	/* Lookup table: bit 2 (write), bit 1 (dix), bit 0 (dif) */
-	const unsigned int ops[] = {	/* wrt dix dif */
-		SCSI_PROT_NORMAL,	/*  0	0   0  */
-		SCSI_PROT_READ_STRIP,	/*  0	0   1  */
-		SCSI_PROT_READ_INSERT,	/*  0	1   0  */
-		SCSI_PROT_READ_PASS,	/*  0	1   1  */
-		SCSI_PROT_NORMAL,	/*  1	0   0  */
-		SCSI_PROT_WRITE_INSERT, /*  1	0   1  */
-		SCSI_PROT_WRITE_STRIP,	/*  1	1   0  */
-		SCSI_PROT_WRITE_PASS,	/*  1	1   1  */
-	};
-
-	return ops[write << 2 | dix << 1 | dif];
-}
-
-/*
- * Returns a mask of the protection flags that are valid for a given DIX
- * operation.
- */
-static inline unsigned int sd_prot_flag_mask(unsigned int prot_op)
-{
-	const unsigned int flag_mask[] = {
-		[SCSI_PROT_NORMAL]		= 0,
-
-		[SCSI_PROT_READ_STRIP]		= SCSI_PROT_TRANSFER_PI |
-						  SCSI_PROT_GUARD_CHECK |
-						  SCSI_PROT_REF_CHECK |
-						  SCSI_PROT_REF_INCREMENT,
-
-		[SCSI_PROT_READ_INSERT]		= SCSI_PROT_REF_INCREMENT |
-						  SCSI_PROT_IP_CHECKSUM,
-
-		[SCSI_PROT_READ_PASS]		= SCSI_PROT_TRANSFER_PI |
-						  SCSI_PROT_GUARD_CHECK |
-						  SCSI_PROT_REF_CHECK |
-						  SCSI_PROT_REF_INCREMENT |
-						  SCSI_PROT_IP_CHECKSUM,
-
-		[SCSI_PROT_WRITE_INSERT]	= SCSI_PROT_TRANSFER_PI |
-						  SCSI_PROT_REF_INCREMENT,
-
-		[SCSI_PROT_WRITE_STRIP]		= SCSI_PROT_GUARD_CHECK |
-						  SCSI_PROT_REF_CHECK |
-						  SCSI_PROT_REF_INCREMENT |
-						  SCSI_PROT_IP_CHECKSUM,
-
-		[SCSI_PROT_WRITE_PASS]		= SCSI_PROT_TRANSFER_PI |
-						  SCSI_PROT_GUARD_CHECK |
-						  SCSI_PROT_REF_CHECK |
-						  SCSI_PROT_REF_INCREMENT |
-						  SCSI_PROT_IP_CHECKSUM,
-	};
-
-	return flag_mask[prot_op];
-}
-
 #ifdef CONFIG_BLK_DEV_INTEGRITY
 
 extern void sd_dif_config_host(struct scsi_disk *);