arm64: assembler: replace `kaddr` with `addr`

The `__dcache_op_workaround_clean_cache` and `dcache_by_line_op` macros
are only expected to be usedc on kernel memory, without a user fault
fixup, and so we named their address variables `kaddr` to make this
clear.

Subseuqent patches will modify these to also work on user memory with an
(optional) user fault fixup, where `kaddr` won't make as much sense. To
aid the legibility of patches, this patch (only) replaces `kaddr` with
`addr` as a preparatory step.

There should be no functional change as a result of this patch.

Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Fuad Tabba <tabba@google.com>
Cc: Ard Biesheuvel <aedb@kernel.org>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Fuad Tabba <tabba@google.com>
Cc: Will Deacon <will@kernel.org>
Reviewed-by: Ard Biesheuvel <ardb@kernel.org>
Link: https://lore.kernel.org/r/20210524083001.2586635-2-tabba@google.com
Signed-off-by: Will Deacon <will@kernel.org>

arch/arm64/include/asm/assembler.h

@@ -377,47 +377,47 @@ alternative_cb_end
 
 /*
  * Macro to perform a data cache maintenance for the interval
- * [kaddr, kaddr + size)
+ * [addr, addr + size)
  *
  * 	op:		operation passed to dc instruction
  * 	domain:		domain used in dsb instruciton
- * 	kaddr:		starting virtual address of the region
+ * 	addr:		starting virtual address of the region
  * 	size:		size of the region
- * 	Corrupts:	kaddr, size, tmp1, tmp2
+ * 	Corrupts:	addr, size, tmp1, tmp2
  */
-	.macro __dcache_op_workaround_clean_cache, op, kaddr
+	.macro __dcache_op_workaround_clean_cache, op, addr
 alternative_if_not ARM64_WORKAROUND_CLEAN_CACHE
-	dc	\op, \kaddr
+	dc	\op, \addr
 alternative_else
-	dc	civac, \kaddr
+	dc	civac, \addr
 alternative_endif
 	.endm
 
-	.macro dcache_by_line_op op, domain, kaddr, size, tmp1, tmp2
+	.macro dcache_by_line_op op, domain, addr, size, tmp1, tmp2
 	dcache_line_size \tmp1, \tmp2
-	add	\size, \kaddr, \size
+	add	\size, \addr, \size
 	sub	\tmp2, \tmp1, #1
-	bic	\kaddr, \kaddr, \tmp2
+	bic	\addr, \addr, \tmp2
 9998:
 	.ifc	\op, cvau
-	__dcache_op_workaround_clean_cache \op, \kaddr
+	__dcache_op_workaround_clean_cache \op, \addr
 	.else
 	.ifc	\op, cvac
-	__dcache_op_workaround_clean_cache \op, \kaddr
+	__dcache_op_workaround_clean_cache \op, \addr
 	.else
 	.ifc	\op, cvap
-	sys	3, c7, c12, 1, \kaddr	// dc cvap
+	sys	3, c7, c12, 1, \addr	// dc cvap
 	.else
 	.ifc	\op, cvadp
-	sys	3, c7, c13, 1, \kaddr	// dc cvadp
+	sys	3, c7, c13, 1, \addr	// dc cvadp
 	.else
-	dc	\op, \kaddr
+	dc	\op, \addr
 	.endif
 	.endif
 	.endif
 	.endif
-	add	\kaddr, \kaddr, \tmp1
+	add	\addr, \addr, \tmp1
-	cmp	\kaddr, \size
+	cmp	\addr, \size
 	b.lo	9998b
 	dsb	\domain
 	.endm