parisc: decide whether to go to slow path (tracesys) based on thread flags

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

diff --git a/arch/parisc/include/asm/thread_info.h b/arch/parisc/include/asm/thread_info.h
index d0e2fe7..d1fb79a 100644 (file)
--- a/arch/parisc/include/asm/thread_info.h
+++ b/arch/parisc/include/asm/thread_info.h
@@ -74,6 +74,8 @@ struct thread_info {
 
 #define _TIF_USER_WORK_MASK     (_TIF_SIGPENDING | _TIF_NOTIFY_RESUME | \
                                  _TIF_NEED_RESCHED)
+#define _TIF_SYSCALL_TRACE_MASK (_TIF_SYSCALL_TRACE | _TIF_SINGLESTEP |        \
+                                _TIF_BLOCKSTEP)
 
 #define tsk_is_polling(t) test_tsk_thread_flag(t, TIF_POLLING_NRFLAG)
 

diff --git a/arch/parisc/kernel/syscall.S b/arch/parisc/kernel/syscall.S
index 54a9cbf..86742df 100644 (file)
--- a/arch/parisc/kernel/syscall.S
+++ b/arch/parisc/kernel/syscall.S
@@ -180,9 +180,10 @@ linux_gateway_entry:
 
        /* Are we being ptraced? */
        mfctl   %cr30, %r1
-       LDREG   TI_TASK(%r1),%r1
-       ldw     TASK_PTRACE(%r1), %r1
-       bb,<,n  %r1,31,.Ltracesys
+       LDREG   TI_FLAGS(%r1),%r1
+       ldi     _TIF_SYSCALL_TRACE_MASK, %r19
+       and,COND(=) %r1, %r19, %r0
+       b,n     .Ltracesys
        
        /* Note!  We cannot use the syscall table that is mapped
        nearby since the gateway page is mapped execute-only. */