5 files changed, 9 insertions, 17 deletions

diff --git a/arch/mn10300/include/asm/frame.inc b/arch/mn10300/include/asm/frame.inc
index 2ee58e3eb6b..1c3eb4fda95 100644
--- a/arch/mn10300/include/asm/frame.inc
+++ b/arch/mn10300/include/asm/frame.inc
@@ -61,7 +61,7 @@
 ###############################################################################
 .macro RESTORE_ALL
         # peel back the stack to the calling frame
-        # - this permits execve() to discard extra frames due to kernel syscalls
+        # - we need that when returning from interrupts to kernel mode
         GET_THREAD_INFO a0
         mov     (TI_frame,a0),fp
         mov     fp,sp
diff --git a/arch/mn10300/include/asm/processor.h b/arch/mn10300/include/asm/processor.h
index 247928c9f54..8b80b19d0c8 100644
--- a/arch/mn10300/include/asm/processor.h
+++ b/arch/mn10300/include/asm/processor.h
@@ -119,20 +119,13 @@ struct thread_struct {
 
 /*
  * do necessary setup to start up a newly executed thread
- * - need to discard the frame stacked by the kernel thread invoking the execve
- *   syscall (see RESTORE_ALL macro)
  */
 static inline void start_thread(struct pt_regs *regs,
                                 unsigned long new_pc, unsigned long new_sp)
 {
-        struct thread_info *ti = current_thread_info();
-        struct pt_regs *frame0;
-
-        frame0 = thread_info_to_uregs(ti);
-        frame0->epsw = EPSW_nSL | EPSW_IE | EPSW_IM;
-        frame0->pc = new_pc;
-        frame0->sp = new_sp;
-        ti->frame = frame0;
+        regs->epsw = EPSW_nSL | EPSW_IE | EPSW_IM;
+        regs->pc = new_pc;
+        regs->sp = new_sp;
 }
 
 
@@ -140,11 +133,6 @@ static inline void start_thread(struct pt_regs *regs,
 extern void release_thread(struct task_struct *);
 
 /*
- * create a kernel thread without removing it from tasklists
- */
-extern int kernel_thread(int (*fn)(void *), void *arg, unsigned long flags);
-
-/*
  * Return saved PC of a blocked thread.
  */
 extern unsigned long thread_saved_pc(struct task_struct *tsk);
diff --git a/arch/mn10300/include/asm/ptrace.h b/arch/mn10300/include/asm/ptrace.h
index 44251b974f1..08ac856c053 100644
--- a/arch/mn10300/include/asm/ptrace.h
+++ b/arch/mn10300/include/asm/ptrace.h
@@ -86,6 +86,7 @@ struct pt_regs {
 #define user_mode(regs)                 (((regs)->epsw & EPSW_nSL) == EPSW_nSL)
 #define instruction_pointer(regs)       ((regs)->pc)
 #define user_stack_pointer(regs)        ((regs)->sp)
+#define current_pt_regs()               current_frame()
 
 #define arch_has_single_step()  (1)
 
diff --git a/arch/mn10300/include/asm/thread_info.h b/arch/mn10300/include/asm/thread_info.h
index ac519bbd42f..f90062b0622 100644
--- a/arch/mn10300/include/asm/thread_info.h
+++ b/arch/mn10300/include/asm/thread_info.h
@@ -160,12 +160,13 @@ void arch_release_thread_info(struct thread_info *ti);
 #define _TIF_SIGPENDING         +(1 << TIF_SIGPENDING)
 #define _TIF_NEED_RESCHED       +(1 << TIF_NEED_RESCHED)
 #define _TIF_SINGLESTEP         +(1 << TIF_SINGLESTEP)
-#define _TIF_RESTORE_SIGMASK    +(1 << TIF_RESTORE_SIGMASK)
 #define _TIF_POLLING_NRFLAG     +(1 << TIF_POLLING_NRFLAG)
 
 #define _TIF_WORK_MASK          0x0000FFFE      /* work to do on interrupt/exception return */
 #define _TIF_ALLWORK_MASK       0x0000FFFF      /* work to do on any return to u-space */
 
+#define tsk_is_polling(t) test_tsk_thread_flag(t, TIF_POLLING_NRFLAG)
+
 #endif /* __KERNEL__ */
 
 #endif /* _ASM_THREAD_INFO_H */
diff --git a/arch/mn10300/include/asm/unistd.h b/arch/mn10300/include/asm/unistd.h
index 866eb14749d..044c770adbb 100644
--- a/arch/mn10300/include/asm/unistd.h
+++ b/arch/mn10300/include/asm/unistd.h
@@ -382,6 +382,8 @@
 #define __ARCH_WANT_SYS_SIGPROCMASK
 #define __ARCH_WANT_SYS_RT_SIGACTION
 #define __ARCH_WANT_SYS_RT_SIGSUSPEND
+#define __ARCH_WANT_SYS_EXECVE
+#define __ARCH_WANT_KERNEL_EXECVE
 
 /*
  * "Conditional" syscalls