[S390] implement is_compat_task

Implement is_compat_task and use it all over the place.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

1 files changed, 5 insertions, 7 deletions

diff --git a/arch/s390/kernel/ptrace.c b/arch/s390/kernel/ptrace.c
index 75c496f4f16d..99eef179e903 100644
--- a/arch/s390/kernel/ptrace.c
+++ b/arch/s390/kernel/ptrace.c
@@ -36,7 +36,7 @@
 #include <linux/elf.h>
 #include <linux/regset.h>
 #include <linux/tracehook.h>
-
+#include <linux/compat.h>
 #include <asm/segment.h>
 #include <asm/page.h>
 #include <asm/pgtable.h>
@@ -69,7 +69,7 @@ FixPerRegisters(struct task_struct *task)
         if (per_info->single_step) {
                 per_info->control_regs.bits.starting_addr = 0;
 #ifdef CONFIG_COMPAT
-                if (test_thread_flag(TIF_31BIT))
+                if (is_compat_task())
                         per_info->control_regs.bits.ending_addr = 0x7fffffffUL;
                 else
 #endif
@@ -482,8 +482,7 @@ static int peek_user_compat(struct task_struct *child,
 {
         __u32 tmp;
 
-        if (!test_thread_flag(TIF_31BIT) ||
-            (addr & 3) || addr > sizeof(struct user) - 3)
+        if (!is_compat_task() || (addr & 3) || addr > sizeof(struct user) - 3)
                 return -EIO;
 
         tmp = __peek_user_compat(child, addr);
@@ -584,8 +583,7 @@ static int __poke_user_compat(struct task_struct *child,
 static int poke_user_compat(struct task_struct *child,
                             addr_t addr, addr_t data)
 {
-        if (!test_thread_flag(TIF_31BIT) ||
-            (addr & 3) || addr > sizeof(struct user32) - 3)
+        if (!is_compat_task() || (addr & 3) || addr > sizeof(struct user32) - 3)
                 return -EIO;
 
         return __poke_user_compat(child, addr, data);
@@ -660,7 +658,7 @@ asmlinkage long do_syscall_trace_enter(struct pt_regs *regs)
         }
 
         if (unlikely(current->audit_context))
-                audit_syscall_entry(test_thread_flag(TIF_31BIT) ?
+                audit_syscall_entry(is_compat_task() ?
                                         AUDIT_ARCH_S390 : AUDIT_ARCH_S390X,
                                     regs->gprs[2], regs->orig_gpr2,
                                     regs->gprs[3], regs->gprs[4],