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-rw-r--r--arch/tile/mm/mmap.c93
1 files changed, 0 insertions, 93 deletions
diff --git a/arch/tile/mm/mmap.c b/arch/tile/mm/mmap.c
deleted file mode 100644
index 8ab28167c44b..000000000000
--- a/arch/tile/mm/mmap.c
+++ /dev/null
@@ -1,93 +0,0 @@
-/*
- * Copyright 2010 Tilera Corporation. All Rights Reserved.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation, version 2.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
- * NON INFRINGEMENT. See the GNU General Public License for
- * more details.
- *
- * Taken from the i386 architecture and simplified.
- */
-
-#include <linux/mm.h>
-#include <linux/random.h>
-#include <linux/limits.h>
-#include <linux/sched/signal.h>
-#include <linux/sched/mm.h>
-#include <linux/mman.h>
-#include <linux/compat.h>
-
-/*
- * Top of mmap area (just below the process stack).
- *
- * Leave an at least ~128 MB hole.
- */
-#define MIN_GAP (128*1024*1024)
-#define MAX_GAP (TASK_SIZE/6*5)
-
-static inline unsigned long mmap_base(struct mm_struct *mm)
-{
- unsigned long gap = rlimit(RLIMIT_STACK);
- unsigned long random_factor = 0;
-
- if (current->flags & PF_RANDOMIZE)
- random_factor = get_random_int() % (1024*1024);
-
- if (gap < MIN_GAP)
- gap = MIN_GAP;
- else if (gap > MAX_GAP)
- gap = MAX_GAP;
-
- return PAGE_ALIGN(TASK_SIZE - gap - random_factor);
-}
-
-/*
- * This function, called very early during the creation of a new
- * process VM image, sets up which VM layout function to use:
- */
-void arch_pick_mmap_layout(struct mm_struct *mm)
-{
-#if !defined(__tilegx__)
- int is_32bit = 1;
-#elif defined(CONFIG_COMPAT)
- int is_32bit = is_compat_task();
-#else
- int is_32bit = 0;
-#endif
- unsigned long random_factor = 0UL;
-
- /*
- * 8 bits of randomness in 32bit mmaps, 24 address space bits
- * 12 bits of randomness in 64bit mmaps, 28 address space bits
- */
- if (current->flags & PF_RANDOMIZE) {
- if (is_32bit)
- random_factor = get_random_int() % (1<<8);
- else
- random_factor = get_random_int() % (1<<12);
-
- random_factor <<= PAGE_SHIFT;
- }
-
- /*
- * Use standard layout if the expected stack growth is unlimited
- * or we are running native 64 bits.
- */
- if (rlimit(RLIMIT_STACK) == RLIM_INFINITY) {
- mm->mmap_base = TASK_UNMAPPED_BASE + random_factor;
- mm->get_unmapped_area = arch_get_unmapped_area;
- } else {
- mm->mmap_base = mmap_base(mm);
- mm->get_unmapped_area = arch_get_unmapped_area_topdown;
- }
-}
-
-unsigned long arch_randomize_brk(struct mm_struct *mm)
-{
- return randomize_page(mm->brk, 0x02000000);
-}