arm64: struct debug_info: Check CONFIG_HAVE_HW_BREAKPOINT

Check if CONFIG_HAVE_HW_BREAKPOINT is enabled before compiling in extra
data required for hardware breakpoints. Compiling out this code when hw
breakpoints are disabled saves about 272 bytes per struct task_struct.

Signed-off-by: Chris Redmon <credmonster@gmail.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>

diff --git a/arch/arm64/include/asm/processor.h b/arch/arm64/include/asm/processor.h
index c97b8bd..9428b93 100644 (file)
--- a/arch/arm64/include/asm/processor.h
+++ b/arch/arm64/include/asm/processor.h
@@ -50,6 +50,7 @@ extern phys_addr_t arm64_dma_phys_limit;
 #define ARCH_LOW_ADDRESS_LIMIT (arm64_dma_phys_limit - 1)
 
 struct debug_info {
+#ifdef CONFIG_HAVE_HW_BREAKPOINT
        /* Have we suspended stepping by a debugger? */
        int                     suspended_step;
        /* Allow breakpoints and watchpoints to be disabled for this thread. */
@@ -58,6 +59,7 @@ struct debug_info {
        /* Hardware breakpoints pinned to this task. */
        struct perf_event       *hbp_break[ARM_MAX_BRP];
        struct perf_event       *hbp_watch[ARM_MAX_WRP];
+#endif
 };
 
 struct cpu_context {