extern void *malloc(int size);
extern void *realloc(void *ptr, int size);
#endif
-#if defined(AFS_OSF_ENV) || defined(AFS_LINUX20_ENV) || defined(AFS_S390_LINUX20_ENV)
+#if defined(AFS_OSF_ENV) || defined(AFS_S390_LINUX20_ENV)
extern int PRE_Block; /* from preempt.c */
#else
extern char PRE_Block; /* from preempt.c */