[IA64] Remove COMPAT_IA32 support

This has been broken since May 2008 when Al Viro killed altroot support.
Since nobody has complained, it would appear that there are no users of
this code (A plausible theory since the main OSVs that support ia64 prefer
to use the IA32-EL software emulation).

Signed-off-by: Tony Luck <tony.luck@intel.com>

1 files changed, 3 insertions, 52 deletions

diff --git a/arch/ia64/kernel/process.c b/arch/ia64/kernel/process.c
index 9bcec9945c12..883ecc9cfef5 100644
--- a/arch/ia64/kernel/process.c
+++ b/arch/ia64/kernel/process.c
@@ -33,7 +33,6 @@
 #include <asm/cpu.h>
 #include <asm/delay.h>
 #include <asm/elf.h>
-#include <asm/ia32.h>
 #include <asm/irq.h>
 #include <asm/kexec.h>
 #include <asm/pgalloc.h>
@@ -358,11 +357,6 @@ ia64_save_extra (struct task_struct *task)
         if (info & PFM_CPUINFO_SYST_WIDE)
                 pfm_syst_wide_update_task(task, info, 0);
 #endif
-
-#ifdef CONFIG_IA32_SUPPORT
-        if (IS_IA32_PROCESS(task_pt_regs(task)))
-                ia32_save_state(task);
-#endif
 }
 
 void
@@ -383,11 +377,6 @@ ia64_load_extra (struct task_struct *task)
         if (info & PFM_CPUINFO_SYST_WIDE) 
                 pfm_syst_wide_update_task(task, info, 1);
 #endif
-
-#ifdef CONFIG_IA32_SUPPORT
-        if (IS_IA32_PROCESS(task_pt_regs(task)))
-                ia32_load_state(task);
-#endif
 }
 
 /*
@@ -426,7 +415,7 @@ copy_thread(unsigned long clone_flags,
              unsigned long user_stack_base, unsigned long user_stack_size,
              struct task_struct *p, struct pt_regs *regs)
 {
-        extern char ia64_ret_from_clone, ia32_ret_from_clone;
+        extern char ia64_ret_from_clone;
         struct switch_stack *child_stack, *stack;
         unsigned long rbs, child_rbs, rbs_size;
         struct pt_regs *child_ptregs;
@@ -457,7 +446,7 @@ copy_thread(unsigned long clone_flags,
         memcpy((void *) child_rbs, (void *) rbs, rbs_size);
 
         if (likely(user_mode(child_ptregs))) {
-                if ((clone_flags & CLONE_SETTLS) && !IS_IA32_PROCESS(regs))
+                if (clone_flags & CLONE_SETTLS)
                         child_ptregs->r13 = regs->r16;  /* see sys_clone2() in entry.S */
                 if (user_stack_base) {
                         child_ptregs->r12 = user_stack_base + user_stack_size - 16;
@@ -477,10 +466,7 @@ copy_thread(unsigned long clone_flags,
                 child_ptregs->r13 = (unsigned long) p;          /* set `current' pointer */
         }
         child_stack->ar_bspstore = child_rbs + rbs_size;
-        if (IS_IA32_PROCESS(regs))
-                child_stack->b0 = (unsigned long) &ia32_ret_from_clone;
-        else
-                child_stack->b0 = (unsigned long) &ia64_ret_from_clone;
+        child_stack->b0 = (unsigned long) &ia64_ret_from_clone;
 
         /* copy parts of thread_struct: */
         p->thread.ksp = (unsigned long) child_stack - 16;
@@ -515,22 +501,6 @@ copy_thread(unsigned long clone_flags,
         p->thread.flags = ((current->thread.flags & ~THREAD_FLAGS_TO_CLEAR)
                            | THREAD_FLAGS_TO_SET);
         ia64_drop_fpu(p);       /* don't pick up stale state from a CPU's fph */
-#ifdef CONFIG_IA32_SUPPORT
-        /*
-         * If we're cloning an IA32 task then save the IA32 extra
-         * state from the current task to the new task
-         */
-        if (IS_IA32_PROCESS(task_pt_regs(current))) {
-                ia32_save_state(p);
-                if (clone_flags & CLONE_SETTLS)
-                        retval = ia32_clone_tls(p, child_ptregs);
-
-                /* Copy partially mapped page list */
-                if (!retval)
-                        retval = ia32_copy_ia64_partial_page_list(p,
-                                                                clone_flags);
-        }
-#endif
 
 #ifdef CONFIG_PERFMON
         if (current->thread.pfm_context)
@@ -704,15 +674,6 @@ EXPORT_SYMBOL(kernel_thread);
 int
 kernel_thread_helper (int (*fn)(void *), void *arg)
 {
-#ifdef CONFIG_IA32_SUPPORT
-        if (IS_IA32_PROCESS(task_pt_regs(current))) {
-                /* A kernel thread is always a 64-bit process. */
-                current->thread.map_base  = DEFAULT_MAP_BASE;
-                current->thread.task_size = DEFAULT_TASK_SIZE;
-                ia64_set_kr(IA64_KR_IO_BASE, current->thread.old_iob);
-                ia64_set_kr(IA64_KR_TSSD, current->thread.old_k1);
-        }
-#endif
         return (*fn)(arg);
 }
 
@@ -725,14 +686,6 @@ flush_thread (void)
         /* drop floating-point and debug-register state if it exists: */
         current->thread.flags &= ~(IA64_THREAD_FPH_VALID | IA64_THREAD_DBG_VALID);
         ia64_drop_fpu(current);
-#ifdef CONFIG_IA32_SUPPORT
-        if (IS_IA32_PROCESS(task_pt_regs(current))) {
-                ia32_drop_ia64_partial_page_list(current);
-                current->thread.task_size = IA32_PAGE_OFFSET;
-                set_fs(USER_DS);
-                memset(current->thread.tls_array, 0, sizeof(current->thread.tls_array));
-        }
-#endif
 }
 
 /*
@@ -753,8 +706,6 @@ exit_thread (void)
         if (current->thread.flags & IA64_THREAD_DBG_VALID)
                 pfm_release_debug_registers(current);
 #endif
-        if (IS_IA32_PROCESS(task_pt_regs(current)))
-                ia32_drop_ia64_partial_page_list(current);
 }
 
 unsigned long