[PATCH] Fix the replacement mistake of xxx_thread_flag

    - fix the replacement mistake of xxx_thread_flag
    - fix the miss test of PT_PTRACED flag

OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>

arch/i386/kernel/i387.c

@@ -52,7 +52,7 @@ static inline void __save_init_fpu( struct task_struct *tsk )
 		asm volatile( "fnsave %0 ; fwait"
 			      : "=m" (tsk->thread.i387.fsave) );
 	}
-	clear_thread_flag(TIF_USEDFPU);
+	clear_tsk_thread_flag(tsk, TIF_USEDFPU);
 }
 
 void save_init_fpu( struct task_struct *tsk )
@@ -63,10 +63,8 @@ void save_init_fpu( struct task_struct *tsk )
 
 void kernel_fpu_begin(void)
 {
-	struct task_struct *tsk = current;
-
 	if (test_thread_flag(TIF_USEDFPU)) {
-		__save_init_fpu(tsk);
+		__save_init_fpu(current);
 		return;
 	}
 	clts();

arch/i386/kernel/ptrace.c

@@ -278,10 +278,10 @@ asmlinkage int sys_ptrace(long request, long pid, long addr, long data)
 		if ((unsigned long) data > _NSIG)
 			break;
 		if (request == PTRACE_SYSCALL) {
-			set_thread_flag(TIF_SYSCALL_TRACE);
+			set_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
 		}
 		else {
-			clear_thread_flag(TIF_SYSCALL_TRACE);
+			clear_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
 		}
 		child->exit_code = data;
 	/* make sure the single step bit is not set. */
@@ -317,7 +317,7 @@ asmlinkage int sys_ptrace(long request, long pid, long addr, long data)
 		ret = -EIO;
 		if ((unsigned long) data > _NSIG)
 			break;
-		clear_thread_flag(TIF_SYSCALL_TRACE);
+		clear_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
 		if ((child->ptrace & PT_DTRACE) == 0) {
 			/* Spurious delayed TF traps may occur */
 			child->ptrace |= PT_DTRACE;
@@ -449,7 +449,7 @@ void do_syscall_trace(struct pt_regs *regs, int entryexit)
 {
 	if (!test_thread_flag(TIF_SYSCALL_TRACE))
 		return;
-	if (current->ptrace & PT_PTRACED)
+	if (!(current->ptrace & PT_PTRACED))
 		return;
 	/* the 0x80 provides a way for the tracing parent to distinguish
 	   between a syscall stop and SIGTRAP delivery */

include/asm-i386/i387.h

@@ -28,15 +28,15 @@ extern void kernel_fpu_begin(void);
 
 
 #define unlazy_fpu( tsk ) do { \
-	if (test_thread_flag(TIF_USEDFPU)) \
+	if (test_tsk_thread_flag(tsk, TIF_USEDFPU)) \
 		save_init_fpu( tsk ); \
 } while (0)
 
 #define clear_fpu( tsk )					\
 do {								\
-	if (test_thread_flag(TIF_USEDFPU)) {	\
+	if (test_tsk_thread_flag(tsk, TIF_USEDFPU)) {		\
 		asm volatile("fwait");				\
-		clear_thread_flag(TIF_USEDFPU);	\
+		clear_tsk_thread_flag(tsk, TIF_USEDFPU);	\
 		stts();						\
 	}							\
 } while (0)

include/asm-i386/thread_info.h

@@ -73,8 +73,8 @@ static inline struct thread_info *current_thread_info(void)
 #define THREAD_SIZE (2*PAGE_SIZE)
 #define alloc_thread_info() ((struct thread_info *) __get_free_pages(GFP_KERNEL,1))
 #define free_thread_info(ti) free_pages((unsigned long) (ti), 1)
-#define get_thread_info(ti) get_task_struct((ti)->l_task)
-#define put_thread_info(ti) put_task_struct((ti)->l_task)
+#define get_thread_info(ti) get_task_struct((ti)->task)
+#define put_thread_info(ti) put_task_struct((ti)->task)
 
 #else /* !__ASSEMBLY__ */