[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, 0 insertions, 146 deletions

diff --git a/arch/ia64/ia32/ia32_ldt.c b/arch/ia64/ia32/ia32_ldt.c
deleted file mode 100644
index 16d51c1..0000000
--- a/arch/ia64/ia32/ia32_ldt.c
+++ /dev/null
@@ -1,146 +0,0 @@
-/*
- * Copyright (C) 2001, 2004 Hewlett-Packard Co
- *	David Mosberger-Tang <davidm@hpl.hp.com>
- *
- * Adapted from arch/i386/kernel/ldt.c
- */
-
-#include <linux/errno.h>
-#include <linux/sched.h>
-#include <linux/string.h>
-#include <linux/mm.h>
-#include <linux/smp.h>
-#include <linux/vmalloc.h>
-
-#include <asm/uaccess.h>
-
-#include "ia32priv.h"
-
-/*
- * read_ldt() is not really atomic - this is not a problem since synchronization of reads
- * and writes done to the LDT has to be assured by user-space anyway. Writes are atomic,
- * to protect the security checks done on new descriptors.
- */
-static int
-read_ldt (void __user *ptr, unsigned long bytecount)
-{
-	unsigned long bytes_left, n;
-	char __user *src, *dst;
-	char buf[256];	/* temporary buffer (don't overflow kernel stack!) */
-
-	if (bytecount > IA32_LDT_ENTRIES*IA32_LDT_ENTRY_SIZE)
-		bytecount = IA32_LDT_ENTRIES*IA32_LDT_ENTRY_SIZE;
-
-	bytes_left = bytecount;
-
-	src = (void __user *) IA32_LDT_OFFSET;
-	dst = ptr;
-
-	while (bytes_left) {
-		n = sizeof(buf);
-		if (n > bytes_left)
-			n = bytes_left;
-
-		/*
-		 * We know we're reading valid memory, but we still must guard against
-		 * running out of memory.
-		 */
-		if (__copy_from_user(buf, src, n))
-			return -EFAULT;
-
-		if (copy_to_user(dst, buf, n))
-			return -EFAULT;
-
-		src += n;
-		dst += n;
-		bytes_left -= n;
-	}
-	return bytecount;
-}
-
-static int
-read_default_ldt (void __user * ptr, unsigned long bytecount)
-{
-	unsigned long size;
-	int err;
-
-	/* XXX fix me: should return equivalent of default_ldt[0] */
-	err = 0;
-	size = 8;
-	if (size > bytecount)
-		size = bytecount;
-
-	err = size;
-	if (clear_user(ptr, size))
-		err = -EFAULT;
-
-	return err;
-}
-
-static int
-write_ldt (void __user * ptr, unsigned long bytecount, int oldmode)
-{
-	struct ia32_user_desc ldt_info;
-	__u64 entry;
-	int ret;
-
-	if (bytecount != sizeof(ldt_info))
-		return -EINVAL;
-	if (copy_from_user(&ldt_info, ptr, sizeof(ldt_info)))
-		return -EFAULT;
-
-	if (ldt_info.entry_number >= IA32_LDT_ENTRIES)
-		return -EINVAL;
-	if (ldt_info.contents == 3) {
-		if (oldmode)
-			return -EINVAL;
-		if (ldt_info.seg_not_present == 0)
-			return -EINVAL;
-	}
-
-	if (ldt_info.base_addr == 0 && ldt_info.limit == 0
-	    && (oldmode || (ldt_info.contents == 0 && ldt_info.read_exec_only == 1
-			    && ldt_info.seg_32bit == 0 && ldt_info.limit_in_pages == 0
-			    && ldt_info.seg_not_present == 1 && ldt_info.useable == 0)))
-		/* allow LDTs to be cleared by the user */
-		entry = 0;
-	else
-		/* we must set the "Accessed" bit as IVE doesn't emulate it */
-		entry = IA32_SEG_DESCRIPTOR(ldt_info.base_addr, ldt_info.limit,
-					    (((ldt_info.read_exec_only ^ 1) << 1)
-					     | (ldt_info.contents << 2)) | 1,
-					    1, 3, ldt_info.seg_not_present ^ 1,
-					    (oldmode ? 0 : ldt_info.useable),
-					    ldt_info.seg_32bit,
-					    ldt_info.limit_in_pages);
-	/*
-	 * Install the new entry.  We know we're accessing valid (mapped) user-level
-	 * memory, but we still need to guard against out-of-memory, hence we must use
-	 * put_user().
-	 */
-	ret = __put_user(entry, (__u64 __user *) IA32_LDT_OFFSET + ldt_info.entry_number);
-	ia32_load_segment_descriptors(current);
-	return ret;
-}
-
-asmlinkage int
-sys32_modify_ldt (int func, unsigned int ptr, unsigned int bytecount)
-{
-	int ret = -ENOSYS;
-
-	switch (func) {
-	      case 0:
-		ret = read_ldt(compat_ptr(ptr), bytecount);
-		break;
-	      case 1:
-		ret = write_ldt(compat_ptr(ptr), bytecount, 1);
-		break;
-	      case 2:
-		ret = read_default_ldt(compat_ptr(ptr), bytecount);
-		break;
-	      case 0x11:
-		ret = write_ldt(compat_ptr(ptr), bytecount, 0);
-		break;
-	}
-	return ret;
-}