Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/geert/linux...

[sfrench/cifs-2.6.git] / arch / x86 / kernel / process.c

diff --git a/arch/x86/kernel/process.c b/arch/x86/kernel/process.c
index 5284cd2b57769f53e79f520ecc6f8199720497cf..5e2ba634ea155759cec36d5581ff131ad0784a68 100644 (file)
--- a/arch/x86/kernel/process.c
+++ b/arch/x86/kernel/process.c
@@ -9,7 +9,9 @@
 #include <linux/pm.h>
 #include <linux/clockchips.h>
 #include <linux/random.h>
+#include <linux/user-return-notifier.h>
 #include <trace/events/power.h>
+#include <linux/hw_breakpoint.h>
 #include <asm/system.h>
 #include <asm/apic.h>
 #include <asm/syscalls.h>
@@ -17,6 +19,7 @@
 #include <asm/uaccess.h>
 #include <asm/i387.h>
 #include <asm/ds.h>
+#include <asm/debugreg.h>
 
 unsigned long idle_halt;
 EXPORT_SYMBOL(idle_halt);
@@ -103,14 +106,7 @@ void flush_thread(void)
        }
 #endif
 
-       clear_tsk_thread_flag(tsk, TIF_DEBUG);
-
-       tsk->thread.debugreg0 = 0;
-       tsk->thread.debugreg1 = 0;
-       tsk->thread.debugreg2 = 0;
-       tsk->thread.debugreg3 = 0;
-       tsk->thread.debugreg6 = 0;
-       tsk->thread.debugreg7 = 0;
+       flush_ptrace_hw_breakpoint(tsk);
        memset(tsk->thread.tls_array, 0, sizeof(tsk->thread.tls_array));
        /*
         * Forget coprocessor state..
@@ -192,16 +188,6 @@ void __switch_to_xtra(struct task_struct *prev_p, struct task_struct *next_p,
        else if (next->debugctlmsr != prev->debugctlmsr)
                update_debugctlmsr(next->debugctlmsr);
 
-       if (test_tsk_thread_flag(next_p, TIF_DEBUG)) {
-               set_debugreg(next->debugreg0, 0);
-               set_debugreg(next->debugreg1, 1);
-               set_debugreg(next->debugreg2, 2);
-               set_debugreg(next->debugreg3, 3);
-               /* no 4 and 5 */
-               set_debugreg(next->debugreg6, 6);
-               set_debugreg(next->debugreg7, 7);
-       }
-
        if (test_tsk_thread_flag(prev_p, TIF_NOTSC) ^
            test_tsk_thread_flag(next_p, TIF_NOTSC)) {
                /* prev and next are different */
@@ -224,6 +210,7 @@ void __switch_to_xtra(struct task_struct *prev_p, struct task_struct *next_p,
                 */
                memset(tss->io_bitmap, 0xff, prev->io_bitmap_max);
        }
+       propagate_user_return_notify(prev_p, next_p);
 }
 
 int sys_fork(struct pt_regs *regs)