arm64/debug: Eliminate magic number for size of BRK instruction

The size of an A64 BRK instruction is the same as the size of all other
A64 instructions, because all A64 instructions are the same size.

BREAK_INSTR_SIZE is retained for readibility, but it should not be
an independent constant from AARCH64_INSN_SIZE.

Signed-off-by: Dave Martin <Dave.Martin@arm.com>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>

diff --git a/arch/arm64/include/asm/debug-monitors.h b/arch/arm64/include/asm/debug-monitors.h
index 40ec68aa6870175714d76d57b64ddb975c0eb5a8..f3d2dbd5f0a72f5bfdf924818c1c8cbec4842f2b 100644 (file)
--- a/arch/arm64/include/asm/debug-monitors.h
+++ b/arch/arm64/include/asm/debug-monitors.h
@@ -18,6 +18,8 @@
 
 #ifdef __KERNEL__
 
+#include <asm/insn.h>
+
 /* Low-level stepping controls. */
 #define DBG_MDSCR_SS           (1 << 0)
 #define DBG_SPSR_SS            (1 << 21)
@@ -38,7 +40,7 @@
 /*
  * Break point instruction encoding
  */
-#define BREAK_INSTR_SIZE               4
+#define BREAK_INSTR_SIZE               AARCH64_INSN_SIZE
 
 /*
  * ESR values expected for dynamic and compile time BRK instruction