parisc: stop using task->ptrace for {single,block}step flags

task->ptrace flags belong to generic code, so instead thief some
TIF_ bits to use. Somewhat risky conversion of code to test TASK_FLAGS
instead of TASK_PTRACE in assembly, but it looks alright in the end.

Signed-off-by: Kyle McMartin <kyle@mcmartin.ca>

1 files changed, 8 insertions, 6 deletions

diff --git a/arch/parisc/kernel/ptrace.c b/arch/parisc/kernel/ptrace.c
index 08f6d2cbf0e..c4f49e45129 100644
--- a/arch/parisc/kernel/ptrace.c
+++ b/arch/parisc/kernel/ptrace.c
@@ -36,7 +36,8 @@
  */
 void ptrace_disable(struct task_struct *task)
 {
-        task->ptrace &= ~(PT_SINGLESTEP|PT_BLOCKSTEP);
+        clear_tsk_thread_flag(task, TIF_SINGLESTEP);
+        clear_tsk_thread_flag(task, TIF_BLOCKSTEP);
 
         /* make sure the trap bits are not set */
         pa_psw(task)->r = 0;
@@ -56,8 +57,8 @@ void user_disable_single_step(struct task_struct *task)
 
 void user_enable_single_step(struct task_struct *task)
 {
-        task->ptrace &= ~PT_BLOCKSTEP;
-        task->ptrace |= PT_SINGLESTEP;
+        clear_tsk_thread_flag(task, TIF_BLOCKSTEP);
+        set_tsk_thread_flag(task, TIF_SINGLESTEP);
 
         if (pa_psw(task)->n) {
                 struct siginfo si;
@@ -99,8 +100,8 @@ void user_enable_single_step(struct task_struct *task)
 
 void user_enable_block_step(struct task_struct *task)
 {
-        task->ptrace &= ~PT_SINGLESTEP;
-        task->ptrace |= PT_BLOCKSTEP;
+        clear_tsk_thread_flag(task, TIF_SINGLESTEP);
+        set_tsk_thread_flag(task, TIF_BLOCKSTEP);
 
         /* Enable taken branch trap. */
         pa_psw(task)->r = 0;
@@ -275,7 +276,8 @@ long do_syscall_trace_enter(struct pt_regs *regs)
 
 void do_syscall_trace_exit(struct pt_regs *regs)
 {
-        int stepping = !!(current->ptrace & (PT_SINGLESTEP|PT_BLOCKSTEP));
+        int stepping = test_thread_flag(TIF_SINGLESTEP) ||
+                test_thread_flag(TIF_BLOCKSTEP);
 
         if (stepping || test_thread_flag(TIF_SYSCALL_TRACE))
                 tracehook_report_syscall_exit(regs, stepping);