x86: make X86_32 pt_regs members unsigned long

Signed-off-by: NHarvey Harrison <harvey.harrison@gmail.com>
Cc: Roland McGrath <roland@redhat.com>
Signed-off-by: NIngo Molnar <mingo@elte.hu>
Signed-off-by: NThomas Gleixner <tglx@linutronix.de>

arch/x86/kernel/signal_32.c

@@ -527,7 +527,7 @@ handle_signal(unsigned long sig, siginfo_t *info, struct k_sigaction *ka,
 	int ret;
 
 	/* Are we from a system call? */
-	if (regs->orig_ax >= 0) {
+	if ((long)regs->orig_ax >= 0) {
 		/* If so, check system call restarting.. */
 		switch (regs->ax) {
 		        case -ERESTART_RESTARTBLOCK:
@@ -625,7 +625,7 @@ static void do_signal(struct pt_regs *regs)
 	}
 
 	/* Did we come from a system call? */
-	if (regs->orig_ax >= 0) {
+	if ((long)regs->orig_ax >= 0) {
 		/* Restart the system call - no handlers present */
 		switch (regs->ax) {
 		case -ERESTARTNOHAND:

include/asm-x86/ptrace.h

@@ -42,12 +42,12 @@ struct pt_regs {
 	unsigned long si;
 	unsigned long di;
 	unsigned long bp;
-	long ax;
+	unsigned long ax;
 	unsigned long ds;
 	unsigned long es;
 	unsigned long fs;
 	/* int  gs; */
-	long orig_ax;
+	unsigned long orig_ax;
 	unsigned long ip;
 	unsigned long cs;
 	unsigned long flags;
@@ -145,7 +145,10 @@ extern void send_sigtrap(struct task_struct *tsk, struct pt_regs *regs, int erro
 void signal_fault(struct pt_regs *regs, void __user *frame, char *where);
 #endif
 
-#define regs_return_value(regs) ((regs)->ax)
+static inline unsigned long regs_return_value(struct pt_regs *regs)
+{
+	return regs->ax;
+}
 
 /*
  * user_mode_vm(regs) determines whether a register set came from user mode.