[PATCH] xen: x86: Use more usermode macro

Use the user_mode macro where it's possible.

Signed-off-by: Vincent Hanquez <vincent.hanquez@cl.cam.ac.uk>
Cc: Ian Pratt <m+Ian.Pratt@cl.cam.ac.uk>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

arch/i386/kernel/process.c

@@ -266,7 +266,7 @@ void show_regs(struct pt_regs * regs)
 	printk("EIP: %04x:[<%08lx>] CPU: %d\n",0xffff & regs->xcs,regs->eip, smp_processor_id());
 	print_symbol("EIP is at %s\n", regs->eip);
 
-	if (regs->xcs & 3)
+	if (user_mode(regs))
 		printk(" ESP: %04x:%08lx",0xffff & regs->xss,regs->esp);
 	printk(" EFLAGS: %08lx    %s  (%s)\n",
 	       regs->eflags, print_tainted(), system_utsname.release);

arch/i386/kernel/signal.c

@@ -605,7 +605,7 @@ int fastcall do_signal(struct pt_regs *regs, sigset_t *oldset)
 	 * kernel mode. Just return without doing anything
 	 * if so.
 	 */
-	if ((regs->xcs & 3) != 3)
+	if (!user_mode(regs))
 		return 1;
 
 	if (current->flags & PF_FREEZE) {

arch/i386/kernel/traps.c

@@ -210,7 +210,7 @@ void show_registers(struct pt_regs *regs)
 
 	esp = (unsigned long) (&regs->esp);
 	ss = __KERNEL_DS;
-	if (regs->xcs & 3) {
+	if (user_mode(regs)) {
 		in_kernel = 0;
 		esp = regs->esp;
 		ss = regs->xss & 0xffff;
@@ -266,7 +266,7 @@ static void handle_BUG(struct pt_regs *regs)
 	char c;
 	unsigned long eip;
 
-	if (regs->xcs & 3)
+	if (user_mode(regs))
 		goto no_bug;		/* Not in kernel */
 
 	eip = regs->eip;
@@ -354,7 +354,7 @@ void die(const char * str, struct pt_regs * regs, long err)
 
 static inline void die_if_kernel(const char * str, struct pt_regs * regs, long err)
 {
-	if (!(regs->eflags & VM_MASK) && !(3 & regs->xcs))
+	if (!user_mode_vm(regs))
 		die(str, regs, err);
 }
 
@@ -367,7 +367,7 @@ static void do_trap(int trapnr, int signr, char *str, int vm86,
 		goto trap_signal;
 	}
 
-	if (!(regs->xcs & 3))
+	if (!user_mode(regs))
 		goto kernel_trap;
 
 	trap_signal: {
@@ -489,7 +489,7 @@ fastcall void do_general_protection(struct pt_regs * regs, long error_code)
 	if (regs->eflags & VM_MASK)
 		goto gp_in_vm86;
 
-	if (!(regs->xcs & 3))
+	if (!user_mode(regs))
 		goto gp_in_kernel;
 
 	current->thread.error_code = error_code;
@@ -716,7 +716,7 @@ fastcall void do_debug(struct pt_regs * regs, long error_code)
 		 * check for kernel mode by just checking the CPL
 		 * of CS.
 		 */
-		if ((regs->xcs & 3) == 0)
+		if (!user_mode(regs))
 			goto clear_TF_reenable;
 	}