ARM: entry: abort-macro: specify registers to be used for macros

Require all callers of abort macros to specify the registers to be
used.  This improves the documentation at the callsites as to which
registers are being used by this assembly code.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

1 files changed, 15 insertions, 15 deletions

diff --git a/arch/arm/mm/abort-macro.S b/arch/arm/mm/abort-macro.S
index d7cb1bfa51a4..8d3b9f999d1e 100644
--- a/arch/arm/mm/abort-macro.S
+++ b/arch/arm/mm/abort-macro.S
@@ -9,33 +9,33 @@
  *
  */
 
-        .macro  do_thumb_abort
-        tst     r3, #PSR_T_BIT
+        .macro  do_thumb_abort, fsr, pc, psr, tmp
+        tst     \psr, #PSR_T_BIT
         beq     not_thumb
-        ldrh    r3, [r2]                        @ Read aborted Thumb instruction
-        and     r3, r3, # 0xfe00                @ Mask opcode field
-        cmp     r3, # 0x5600                    @ Is it ldrsb?
-        orreq   r3, r3, #1 << 11                @ Set L-bit if yes
-        tst     r3, #1 << 11                    @ L = 0 -> write
-        orreq   r1, r1, #1 << 11                @ yes.
+        ldrh    \tmp, [\pc]                     @ Read aborted Thumb instruction
+        and     \tmp, \tmp, # 0xfe00            @ Mask opcode field
+        cmp     \tmp, # 0x5600                  @ Is it ldrsb?
+        orreq   \tmp, \tmp, #1 << 11            @ Set L-bit if yes
+        tst     \tmp, #1 << 11                  @ L = 0 -> write
+        orreq   \psr, \psr, #1 << 11            @ yes.
         mov     pc, lr
 not_thumb:
         .endm
 
 /*
- * We check for the following insturction encoding for LDRD.
+ * We check for the following instruction encoding for LDRD.
  *
- * [27:25] == 0
+ * [27:25] == 000
  *   [7:4] == 1101
  *    [20] == 0
  */
-        .macro  do_ldrd_abort
-        tst     r3, #0x0e000000                 @ [27:25] == 0
+        .macro  do_ldrd_abort, tmp, insn
+        tst     \insn, #0x0e000000              @ [27:25] == 0
         bne     not_ldrd
-        and     r2, r3, #0x000000f0             @ [7:4] == 1101
-        cmp     r2, #0x000000d0
+        and     \tmp, \insn, #0x000000f0        @ [7:4] == 1101
+        cmp     \tmp, #0x000000d0
         bne     not_ldrd
-        tst     r3, #1 << 20                    @ [20] == 0
+        tst     \insn, #1 << 20                 @ [20] == 0
         moveq   pc, lr
 not_ldrd:
         .endm