uml: improve error messages

These error messages are from check_sysemu(), not check_ptrace().

Signed-off-by: WANG Cong <[e-mail]>
Cc: Jeff Dike <[e-mail]>
Signed-off-by: Andrew Morton <[e-mail]>
Signed-off-by: Linus Torvalds <[e-mail]>

arch/um/os-Linux/start_up.c

···
 
 	if ((ptrace(PTRACE_OLDSETOPTIONS, pid, 0,
 		   (void *) PTRACE_O_TRACESYSGOOD) < 0))
-		fatal_perror("check_ptrace: PTRACE_OLDSETOPTIONS failed");
+		fatal_perror("check_sysemu: PTRACE_OLDSETOPTIONS failed");
 
 	while (1) {
 		count++;
···
 			goto fail;
 		CATCH_EINTR(n = waitpid(pid, &status, WUNTRACED));
 		if (n < 0)
-			fatal_perror("check_ptrace : wait failed");
+			fatal_perror("check_sysemu: wait failed");
 
 		if (WIFSTOPPED(status) &&
 		    (WSTOPSIG(status) == (SIGTRAP|0x80))) {
 			if (!count) {
-				non_fatal("check_ptrace : SYSEMU_SINGLESTEP "
+				non_fatal("check_sysemu: SYSEMU_SINGLESTEP "
 					  "doesn't singlestep");
 				goto fail;
 			}
···
 		else if (WIFSTOPPED(status) && (WSTOPSIG(status) == SIGTRAP))
 			count++;
 		else {
-			non_fatal("check_ptrace : expected SIGTRAP or "
+			non_fatal("check_sysemu: expected SIGTRAP or "
 				  "(SIGTRAP | 0x80), got status = %d\n",
 				  status);
 			goto fail;