rm_ss, rm_sp, and pm_esp don't need to be accessed from anywhere

outside of librm.S.

src/arch/i386/include/librm.h

@@ -60,9 +60,6 @@ extern char *text16;
 	      ( ( ( void * ) &(variable) ) - ( ( void * ) text16 ) ) ) )
 
 /* Variables in librm.S, present in the normal data segment */
-extern uint16_t rm_sp;
-extern uint16_t rm_ss;
-extern uint32_t pm_esp;
 extern uint16_t __data16 ( rm_cs );
 #define rm_cs __use_data16 ( rm_cs )
 extern uint16_t __text16 ( rm_ds );

src/arch/i386/transitions/librm.S

@@ -528,11 +528,8 @@ rc_function:	.word 0, 0
  ****************************************************************************
  */
 	.section ".data"
-	.globl rm_sp
 rm_sp:	.word 0
-	.globl rm_ss
 rm_ss:	.word 0
-	.globl pm_esp
 pm_esp:	.long _estack
 
 /****************************************************************************

src/arch/i386/transitions/librm_mgmt.c

@@ -1,48 +0,0 @@
-/*
- * librm: a library for interfacing to real-mode code
- *
- * Michael Brown <mbrown@fensystems.co.uk>
- *
- */
-
-#ifdef KEEP_IT_REAL
-/* Build a null object under -DKEEP_IT_REAL */
-#else
-
-#include <stdint.h>
-#include <librm.h>
-
-/*
- * This file provides functions for managing librm.
- *
- */
-
-/*
- * Allocate space on the real-mode stack and copy data there.
- *
- */
-uint16_t copy_to_rm_stack ( void *data, size_t size ) {
-#ifdef DEBUG_LIBRM
-	if ( rm_sp <= size ) {
-		printf ( "librm: out of space in RM stack\n" );
-		lockup();
-	}
-#endif
-	rm_sp -= size;
-	copy_to_real ( rm_ss, rm_sp, data, size );
-	return rm_sp;
-};
-
-/*
- * Deallocate space on the real-mode stack, optionally copying back
- * data.
- *
- */
-void remove_from_rm_stack ( void *data, size_t size ) {
-	if ( data ) {
-		copy_from_real ( data, rm_ss, rm_sp, size );
-	}
-	rm_sp += size;
-};
-
-#endif /* KEEP_IT_REAL */