score: update files according to review comments

modified:   arch/score/include/asm/cacheflush.h
	modified:   arch/score/include/asm/delay.h
	modified:   arch/score/include/asm/errno.h
	modified:   arch/score/include/asm/pgtable-bits.h
	modified:   arch/score/include/asm/pgtable.h
	modified:   arch/score/include/asm/ptrace.h
	modified:   arch/score/include/asm/unistd.h
	modified:   arch/score/kernel/entry.S
	modified:   arch/score/kernel/process.c
	modified:   arch/score/kernel/ptrace.c
	modified:   arch/score/kernel/signal.c
	modified:   arch/score/kernel/sys_score.c
	modified:   arch/score/kernel/traps.c
	modified:   arch/score/mm/cache.c

Signed-off-by: Chen Liqin <liqin.chen@sunplusct.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

6 files changed, 50 insertions, 117 deletions

diff --git a/arch/score/kernel/entry.S b/arch/score/kernel/entry.S
index 6c6b7ea58af..0af89b2f16b 100644
--- a/arch/score/kernel/entry.S
+++ b/arch/score/kernel/entry.S
@@ -23,7 +23,7 @@
  * 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  */
 
-#include <linux/errno.h>
+#include <linux/err.h>
 #include <linux/init.h>
 #include <linux/linkage.h>
 
@@ -434,7 +434,7 @@ stack_done:
         sw      r8, [r0, PT_R7]
         b 2f
 1:
-        cmpi.c  r4, -EMAXERRNO-1        # -EMAXERRNO - 1=-1134
+        cmpi.c  r4, -MAX_ERRNO - 1
         ble     2f
         ldi     r8, 0x1;
         sw      r8, [r0, PT_R7]
@@ -466,7 +466,7 @@ syscall_trace_entry:
         lw      r7, [r0, PT_R7]
         brl     r8
 
-        li      r8, -EMAXERRNO - 1      # error?
+        li      r8, -MAX_ERRNO - 1
         sw      r8, [r0, PT_R7]         # set error flag
 
         neg     r4, r4                  # error
diff --git a/arch/score/kernel/process.c b/arch/score/kernel/process.c
index aaa3085251f..d93966f7ac8 100644
--- a/arch/score/kernel/process.c
+++ b/arch/score/kernel/process.c
@@ -56,7 +56,7 @@ void __noreturn cpu_idle(void)
         }
 }
 
-asmlinkage void ret_from_fork(void);
+void ret_from_fork(void);
 
 void start_thread(struct pt_regs *regs, unsigned long pc, unsigned long sp)
 {
diff --git a/arch/score/kernel/ptrace.c b/arch/score/kernel/ptrace.c
index 8fe7209355a..19911e3187b 100644
--- a/arch/score/kernel/ptrace.c
+++ b/arch/score/kernel/ptrace.c
@@ -80,7 +80,35 @@ write_tsk_long(struct task_struct *child,
         return copied != sizeof(val) ? -EIO : 0;
 }
 
-void set_single_step(struct task_struct *child)
+/*
+ * Get all user integer registers.
+ */
+static int ptrace_getregs(struct task_struct *tsk, void __user *uregs)
+{
+        struct pt_regs *regs = task_pt_regs(tsk);
+
+        return copy_to_user(uregs, regs, sizeof(struct pt_regs)) ? -EFAULT : 0;
+}
+
+/*
+ * Set all user integer registers.
+ */
+static int ptrace_setregs(struct task_struct *tsk, void __user *uregs)
+{
+        struct pt_regs newregs;
+        int ret;
+
+        ret = -EFAULT;
+        if (copy_from_user(&newregs, uregs, sizeof(struct pt_regs)) == 0) {
+                struct pt_regs *regs = task_pt_regs(tsk);
+                *regs = newregs;
+                ret = 0;
+        }
+
+        return ret;
+}
+
+void user_enable_single_step(struct task_struct *child)
 {
         /* far_epc is the target of branch */
         unsigned int epc, far_epc = 0;
@@ -201,7 +229,7 @@ void set_single_step(struct task_struct *child)
         }
 }
 
-void clear_single_step(struct task_struct *child)
+void user_disable_single_step(struct task_struct *child)
 {
         if (child->thread.insn1_type == 0)
                 write_tsk_short(child, child->thread.addr1,
@@ -230,54 +258,17 @@ void clear_single_step(struct task_struct *child)
         child->thread.ss_nextcnt = 0;
 }
 
-
-void ptrace_disable(struct task_struct *child) {}
+void ptrace_disable(struct task_struct *child)
+{
+        user_disable_single_step(child);
+}
 
 long
 arch_ptrace(struct task_struct *child, long request, long addr, long data)
 {
         int ret;
 
-        if (request == PTRACE_TRACEME) {
-                /* are we already being traced? */
-                if (current->ptrace & PT_PTRACED)
-                        return -EPERM;
-
-                /* set the ptrace bit in the process flags. */
-                current->ptrace |= PT_PTRACED;
-                return 0;
-        }
-
-        ret = -ESRCH;
-        if (!child)
-                return ret;
-
-        ret = -EPERM;
-
-        if (request == PTRACE_ATTACH) {
-                ret = ptrace_attach(child);
-                return ret;
-        }
-
-        ret = ptrace_check_attach(child, request == PTRACE_KILL);
-        if (ret < 0)
-                return ret;
-
         switch (request) {
-        case PTRACE_PEEKTEXT: /* read word at location addr. */
-        case PTRACE_PEEKDATA: {
-                unsigned long tmp;
-                int copied;
-
-                copied = access_process_vm(child, addr, &tmp, sizeof(tmp), 0);
-                ret = -EIO;
-                if (copied != sizeof(tmp))
-                        break;
-
-                ret = put_user(tmp, (unsigned long *) data);
-                return ret;
-        }
-
         /* Read the word at location addr in the USER area.  */
         case PTRACE_PEEKUSR: {
                 struct pt_regs *regs;
@@ -329,15 +320,6 @@ arch_ptrace(struct task_struct *child, long request, long addr, long data)
                 return ret;
         }
 
-        case PTRACE_POKETEXT: /* write the word at location addr. */
-        case PTRACE_POKEDATA:
-                ret = 0;
-                if (access_process_vm(child, addr, &data, sizeof(data), 1)
-                        == sizeof(data))
-                        break;
-                ret = -EIO;
-                return ret;
-
         case PTRACE_POKEUSR: {
                 struct pt_regs *regs;
                 ret = 0;
@@ -372,64 +354,16 @@ arch_ptrace(struct task_struct *child, long request, long addr, long data)
                 break;
         }
 
-        case PTRACE_SYSCALL: /* continue and stop at next
-                                (return from) syscall. */
-        case PTRACE_CONT: { /* restart after signal. */
-                ret = -EIO;
-                if (!valid_signal(data))
-                        break;
-                if (request == PTRACE_SYSCALL)
-                        set_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
-                else
-                        clear_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
-
-                child->exit_code = data;
-                wake_up_process(child);
-                ret = 0;
-                break;
-        }
-
-        /*
-         * make the child exit.  Best I can do is send it a sigkill.
-         * perhaps it should be put in the status that it wants to
-         * exit.
-         */
-        case PTRACE_KILL:
-                ret = 0;
-                if (child->state == EXIT_ZOMBIE)        /* already dead. */
-                        break;
-                child->exit_code = SIGKILL;
-                clear_single_step(child);
-                wake_up_process(child);
+        case PTRACE_GETREGS:
+                ret = ptrace_getregs(child, (void __user *)data);
                 break;
 
-        case PTRACE_SINGLESTEP: {               /* set the trap flag. */
-                ret = -EIO;
-                if ((unsigned long) data > _NSIG)
-                        break;
-                clear_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
-                set_single_step(child);
-                child->exit_code = data;
-                /* give it a chance to run. */
-                wake_up_process(child);
-                ret = 0;
-                break;
-        }
-
-        case PTRACE_DETACH: /* detach a process that was attached. */
-                ret = ptrace_detach(child, data);
-                break;
-
-        case PTRACE_SETOPTIONS:
-                if (data & PTRACE_O_TRACESYSGOOD)
-                        child->ptrace |= PT_TRACESYSGOOD;
-                else
-                        child->ptrace &= ~PT_TRACESYSGOOD;
-                ret = 0;
+        case PTRACE_SETREGS:
+                ret = ptrace_setregs(child, (void __user *)data);
                 break;
 
         default:
-                ret = -EIO;
+                ret = ptrace_request(child, request, addr, data);
                 break;
         }
 
diff --git a/arch/score/kernel/signal.c b/arch/score/kernel/signal.c
index b4ed1b3f807..5c004084d17 100644
--- a/arch/score/kernel/signal.c
+++ b/arch/score/kernel/signal.c
@@ -132,7 +132,7 @@ void __user *get_sigframe(struct k_sigaction *ka, struct pt_regs *regs,
         return (void *)((sp - frame_size) & ~7);
 }
 
-asmlinkage int score_sigaltstack(struct pt_regs *regs)
+int score_sigaltstack(struct pt_regs *regs)
 {
         const stack_t *uss = (const stack_t *) regs->regs[4];
         stack_t *uoss = (stack_t *) regs->regs[5];
@@ -141,7 +141,7 @@ asmlinkage int score_sigaltstack(struct pt_regs *regs)
         return do_sigaltstack(uss, uoss, usp);
 }
 
-asmlinkage void score_rt_sigreturn(struct pt_regs *regs)
+void score_rt_sigreturn(struct pt_regs *regs)
 {
         struct rt_sigframe __user *frame;
         sigset_t set;
@@ -276,7 +276,7 @@ int handle_signal(unsigned long sig, siginfo_t *info,
         return ret;
 }
 
-asmlinkage void do_signal(struct pt_regs *regs)
+void do_signal(struct pt_regs *regs)
 {
         struct k_sigaction ka;
         sigset_t *oldset;
diff --git a/arch/score/kernel/sys_score.c b/arch/score/kernel/sys_score.c
index 6a60d1ee533..68655f4cbce 100644
--- a/arch/score/kernel/sys_score.c
+++ b/arch/score/kernel/sys_score.c
@@ -64,8 +64,7 @@ sys_mmap2(unsigned long addr, unsigned long len, unsigned long prot,
  * Clone a task - this clones the calling program thread.
  * This is called indirectly via a small wrapper
  */
-asmlinkage int
-score_clone(struct pt_regs *regs)
+int score_clone(struct pt_regs *regs)
 {
         unsigned long clone_flags;
         unsigned long newsp;
@@ -93,7 +92,7 @@ score_clone(struct pt_regs *regs)
  * sys_execve() executes a new program.
  * This is called indirectly via a small wrapper
  */
-asmlinkage int score_execve(struct pt_regs *regs)
+int score_execve(struct pt_regs *regs)
 {
         int error;
         char *filename;
@@ -114,7 +113,7 @@ asmlinkage int score_execve(struct pt_regs *regs)
  * If we ever come here the user sp is bad.  Zap the process right away.
  * Due to the bad stack signaling wouldn't work.
  */
-asmlinkage void bad_stack(void)
+void bad_stack(void)
 {
         do_exit(SIGSEGV);
 }
diff --git a/arch/score/kernel/traps.c b/arch/score/kernel/traps.c
index 957ae9eb356..0e46fb19a84 100644
--- a/arch/score/kernel/traps.c
+++ b/arch/score/kernel/traps.c
@@ -252,7 +252,7 @@ asmlinkage void do_ri(struct pt_regs *regs)
         if (current->thread.single_step == 1) {
                 if ((epc == current->thread.addr1) ||
                     (epc == current->thread.addr2)) {
-                        clear_single_step(current);
+                        user_disable_single_step(current);
                         force_sig(SIGTRAP, current);
                         return;
                 } else