ia64: Desupport GCC 2.96 and everything older.

arch/ia64/Makefile

@@ -36,7 +36,7 @@ $(error Sorry, you need a newer version of the assember, one that is built from
 endif
 
 ifneq ($(GCC_VERSION),2)
-	cflags-$(CONFIG_ITANIUM) += -frename-registers
+$(error Sorry, your compiler is too old.  GCC v2.96 is known to generate bad code.)
 endif
 
 ifeq ($(GCC_VERSION),3)

arch/ia64/kernel/entry.S

@@ -829,11 +829,7 @@ skip_rbs_switch:
 	ssm  psr.i		// enable interrupts
 #endif
 
-#if __GNUC__ < 3
-	br.call.spnt.many rp=invoke_schedule
-#else
 	br.call.spnt.many rp=schedule
-#endif
 .ret9:	cmp.eq p6,p0=r0,r0				// p6 <- 1
 	rsm psr.i		// disable interrupts
 	;;
@@ -892,31 +888,6 @@ GLOBAL_ENTRY(ia64_invoke_schedule_tail)
 	br.ret.sptk.many rp
 END(ia64_invoke_schedule_tail)
 
-#if __GNUC__ < 3
-
-	/*
-	 * Invoke schedule() while preserving in0-in7, which may be needed
-	 * in case a system call gets restarted.  Note that declaring schedule()
-	 * with asmlinkage() is NOT enough because that will only preserve as many
-	 * registers as there are formal arguments.
-	 *
-	 * XXX fix me: with gcc 3.0, we won't need this anymore because syscall_linkage
-	 *	renders all eight input registers (in0-in7) as "untouchable".
-	 */
-ENTRY(invoke_schedule)
-	.prologue ASM_UNW_PRLG_RP|ASM_UNW_PRLG_PFS, ASM_UNW_PRLG_GRSAVE(8)
-	alloc loc1=ar.pfs,8,2,0,0
-	mov loc0=rp
-	;;
-	.body
-	br.call.sptk.many rp=schedule
-.ret14:	mov ar.pfs=loc1
-	mov rp=loc0
-	br.ret.sptk.many rp
-END(invoke_schedule)
-
-#endif /* __GNUC__ < 3 */
-
 	/*
 	 * Setup stack and call do_notify_resume_user().  Note that pSys and pNonSys need to
 	 * be set up by the caller.  We declare 8 input registers so the system call

arch/ia64/kernel/perfmon.c

@@ -1636,10 +1636,6 @@ pfm_read_pmds(struct task_struct *task, pfm_context_t *ctx, void *arg, int count
 	unsigned int cnum, reg_flags = 0;
 	int i, ret = 0;
 
-#if __GNUC__ < 3
-	int foo;
-#endif
-
 	if (!CTX_IS_ENABLED(ctx)) return -EINVAL;
 
 	/*
@@ -1655,15 +1651,9 @@ pfm_read_pmds(struct task_struct *task, pfm_context_t *ctx, void *arg, int count
 
 	for (i = 0; i < count; i++, req++) {
 		int me;
-#if __GNUC__ < 3
-		foo = __get_user(cnum, &req->reg_num);
-		if (foo) return -EFAULT;
-		foo = __get_user(reg_flags, &req->reg_flags);
-		if (foo) return -EFAULT;
-#else
+
 		if (__get_user(cnum, &req->reg_num)) return -EFAULT;
 		if (__get_user(reg_flags, &req->reg_flags)) return -EFAULT;
-#endif
 		lval = 0UL;
 
 		if (!PMD_IS_IMPL(cnum)) goto abort_mission;

arch/ia64/lib/memcpy_mck.S

@@ -15,11 +15,7 @@
 #include <asm/asmmacro.h>
 #include <asm/page.h>
 
-#if __GNUC__ >= 3
-# define EK(y...) EX(y)
-#else
-# define EK(y,x...)  x
-#endif
+#define EK(y...) EX(y)
 
 GLOBAL_ENTRY(bcopy)
 	.regstk 3,0,0,0

include/asm-ia64/asmmacro.h

@@ -43,21 +43,12 @@
 	.section "__ex_table", "a"		// declare section & section attributes
 	.previous
 
-#if __GNUC__ >= 3
 # define EX(y,x...)				\
 	.xdata4 "__ex_table", 99f-., y-.;	\
   [99:]	x
 # define EXCLR(y,x...)				\
 	.xdata4 "__ex_table", 99f-., y-.+4;	\
   [99:]	x
-#else
-# define EX(y,x...)				\
-	.xdata4 "__ex_table", 99f-., y-.;	\
-  99:	x
-# define EXCLR(y,x...)				\
-	.xdata4 "__ex_table", 99f-., y-.+4;	\
-  99:	x
-#endif
 
 /*
  * For now, we always put in the McKinley E9 workaround.  On CPUs that don't need it,