hw-breakpoints: Rewrite the hw-breakpoints layer on top of perf events

[firefly-linux-kernel-4.4.55.git] / arch / x86 / kernel / process.c

diff --git a/arch/x86/kernel/process.c b/arch/x86/kernel/process.c
index cf8ee0016307b948d94685d1f3d55c74009dd5b4..744508e7cfdd051e3896fe5ec28d5d3da0f3c16c 100644 (file)
--- a/arch/x86/kernel/process.c
+++ b/arch/x86/kernel/process.c
@@ -10,6 +10,7 @@
 #include <linux/clockchips.h>
 #include <linux/random.h>
 #include <trace/events/power.h>
+#include <linux/hw_breakpoint.h>
 #include <asm/system.h>
 #include <asm/apic.h>
 #include <asm/syscalls.h>
@@ -18,7 +19,6 @@
 #include <asm/i387.h>
 #include <asm/ds.h>
 #include <asm/debugreg.h>
-#include <asm/hw_breakpoint.h>
 
 unsigned long idle_halt;
 EXPORT_SYMBOL(idle_halt);
@@ -47,8 +47,6 @@ void free_thread_xstate(struct task_struct *tsk)
                kmem_cache_free(task_xstate_cachep, tsk->thread.xstate);
                tsk->thread.xstate = NULL;
        }
-       if (unlikely(test_tsk_thread_flag(tsk, TIF_DEBUG)))
-               flush_thread_hw_breakpoint(tsk);
 
        WARN(tsk->thread.ds_ctx, "leaking DS context\n");
 }
@@ -107,8 +105,7 @@ void flush_thread(void)
        }
 #endif
 
-       if (unlikely(test_tsk_thread_flag(tsk, TIF_DEBUG)))
-               flush_thread_hw_breakpoint(tsk);
+       flush_ptrace_hw_breakpoint(tsk);
        memset(tsk->thread.tls_array, 0, sizeof(tsk->thread.tls_array));
        /*
         * Forget coprocessor state..