1 files changed, 0 insertions, 168 deletions

diff --git a/ANDROID_3.4.5/arch/s390/mm/maccess.c b/ANDROID_3.4.5/arch/s390/mm/maccess.c
deleted file mode 100644
index e1335dc2..00000000
--- a/ANDROID_3.4.5/arch/s390/mm/maccess.c
+++ /dev/null
@@ -1,168 +0,0 @@
-/*
- * Access kernel memory without faulting -- s390 specific implementation.
- *
- * Copyright IBM Corp. 2009
- *
- *   Author(s): Heiko Carstens <heiko.carstens@de.ibm.com>,
- *
- */
-
-#include <linux/uaccess.h>
-#include <linux/kernel.h>
-#include <linux/types.h>
-#include <linux/errno.h>
-#include <linux/gfp.h>
-#include <asm/ctl_reg.h>
-
-/*
- * This function writes to kernel memory bypassing DAT and possible
- * write protection. It copies one to four bytes from src to dst
- * using the stura instruction.
- * Returns the number of bytes copied or -EFAULT.
- */
-static long probe_kernel_write_odd(void *dst, const void *src, size_t size)
-{
-	unsigned long count, aligned;
-	int offset, mask;
-	int rc = -EFAULT;
-
-	aligned = (unsigned long) dst & ~3UL;
-	offset = (unsigned long) dst & 3;
-	count = min_t(unsigned long, 4 - offset, size);
-	mask = (0xf << (4 - count)) & 0xf;
-	mask >>= offset;
-	asm volatile(
-		"	bras	1,0f\n"
-		"	icm	0,0,0(%3)\n"
-		"0:	l	0,0(%1)\n"
-		"	lra	%1,0(%1)\n"
-		"1:	ex	%2,0(1)\n"
-		"2:	stura	0,%1\n"
-		"	la	%0,0\n"
-		"3:\n"
-		EX_TABLE(0b,3b) EX_TABLE(1b,3b) EX_TABLE(2b,3b)
-		: "+d" (rc), "+a" (aligned)
-		: "a" (mask), "a" (src) : "cc", "memory", "0", "1");
-	return rc ? rc : count;
-}
-
-long probe_kernel_write(void *dst, const void *src, size_t size)
-{
-	long copied = 0;
-
-	while (size) {
-		copied = probe_kernel_write_odd(dst, src, size);
-		if (copied < 0)
-			break;
-		dst += copied;
-		src += copied;
-		size -= copied;
-	}
-	return copied < 0 ? -EFAULT : 0;
-}
-
-static int __memcpy_real(void *dest, void *src, size_t count)
-{
-	register unsigned long _dest asm("2") = (unsigned long) dest;
-	register unsigned long _len1 asm("3") = (unsigned long) count;
-	register unsigned long _src  asm("4") = (unsigned long) src;
-	register unsigned long _len2 asm("5") = (unsigned long) count;
-	int rc = -EFAULT;
-
-	asm volatile (
-		"0:	mvcle	%1,%2,0x0\n"
-		"1:	jo	0b\n"
-		"	lhi	%0,0x0\n"
-		"2:\n"
-		EX_TABLE(1b,2b)
-		: "+d" (rc), "+d" (_dest), "+d" (_src), "+d" (_len1),
-		  "+d" (_len2), "=m" (*((long *) dest))
-		: "m" (*((long *) src))
-		: "cc", "memory");
-	return rc;
-}
-
-/*
- * Copy memory in real mode (kernel to kernel)
- */
-int memcpy_real(void *dest, void *src, size_t count)
-{
-	unsigned long flags;
-	int rc;
-
-	if (!count)
-		return 0;
-	local_irq_save(flags);
-	__arch_local_irq_stnsm(0xfbUL);
-	rc = __memcpy_real(dest, src, count);
-	local_irq_restore(flags);
-	return rc;
-}
-
-/*
- * Copy memory to absolute zero
- */
-void copy_to_absolute_zero(void *dest, void *src, size_t count)
-{
-	unsigned long cr0;
-
-	BUG_ON((unsigned long) dest + count >= sizeof(struct _lowcore));
-	preempt_disable();
-	__ctl_store(cr0, 0, 0);
-	__ctl_clear_bit(0, 28); /* disable lowcore protection */
-	memcpy_real(dest + store_prefix(), src, count);
-	__ctl_load(cr0, 0, 0);
-	preempt_enable();
-}
-
-/*
- * Copy memory from kernel (real) to user (virtual)
- */
-int copy_to_user_real(void __user *dest, void *src, size_t count)
-{
-	int offs = 0, size, rc;
-	char *buf;
-
-	buf = (char *) __get_free_page(GFP_KERNEL);
-	if (!buf)
-		return -ENOMEM;
-	rc = -EFAULT;
-	while (offs < count) {
-		size = min(PAGE_SIZE, count - offs);
-		if (memcpy_real(buf, src + offs, size))
-			goto out;
-		if (copy_to_user(dest + offs, buf, size))
-			goto out;
-		offs += size;
-	}
-	rc = 0;
-out:
-	free_page((unsigned long) buf);
-	return rc;
-}
-
-/*
- * Copy memory from user (virtual) to kernel (real)
- */
-int copy_from_user_real(void *dest, void __user *src, size_t count)
-{
-	int offs = 0, size, rc;
-	char *buf;
-
-	buf = (char *) __get_free_page(GFP_KERNEL);
-	if (!buf)
-		return -ENOMEM;
-	rc = -EFAULT;
-	while (offs < count) {
-		size = min(PAGE_SIZE, count - offs);
-		if (copy_from_user(buf, src + offs, size))
-			goto out;
-		if (memcpy_real(dest + offs, buf, size))
-			goto out;
-		offs += size;
-	}
-	rc = 0;
-out:
-	free_page((unsigned long) buf);
-	return rc;
-}