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-rw-r--r--arch/nds32/mm/mmap.c73
1 files changed, 0 insertions, 73 deletions
diff --git a/arch/nds32/mm/mmap.c b/arch/nds32/mm/mmap.c
deleted file mode 100644
index 1bdf5e7d1b43..000000000000
--- a/arch/nds32/mm/mmap.c
+++ /dev/null
@@ -1,73 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-// Copyright (C) 2005-2017 Andes Technology Corporation
-
-#include <linux/sched.h>
-#include <linux/mman.h>
-#include <linux/shm.h>
-
-#define COLOUR_ALIGN(addr,pgoff) \
- ((((addr)+SHMLBA-1)&~(SHMLBA-1)) + \
- (((pgoff)<<PAGE_SHIFT) & (SHMLBA-1)))
-
-/*
- * We need to ensure that shared mappings are correctly aligned to
- * avoid aliasing issues with VIPT caches. We need to ensure that
- * a specific page of an object is always mapped at a multiple of
- * SHMLBA bytes.
- *
- * We unconditionally provide this function for all cases, however
- * in the VIVT case, we optimise out the alignment rules.
- */
-unsigned long
-arch_get_unmapped_area(struct file *filp, unsigned long addr,
- unsigned long len, unsigned long pgoff,
- unsigned long flags)
-{
- struct mm_struct *mm = current->mm;
- struct vm_area_struct *vma;
- int do_align = 0;
- struct vm_unmapped_area_info info;
- int aliasing = 0;
- if(IS_ENABLED(CONFIG_CPU_CACHE_ALIASING))
- aliasing = 1;
-
- /*
- * We only need to do colour alignment if either the I or D
- * caches alias.
- */
- if (aliasing)
- do_align = filp || (flags & MAP_SHARED);
-
- /*
- * We enforce the MAP_FIXED case.
- */
- if (flags & MAP_FIXED) {
- if (aliasing && flags & MAP_SHARED &&
- (addr - (pgoff << PAGE_SHIFT)) & (SHMLBA - 1))
- return -EINVAL;
- return addr;
- }
-
- if (len > TASK_SIZE)
- return -ENOMEM;
-
- if (addr) {
- if (do_align)
- addr = COLOUR_ALIGN(addr, pgoff);
- else
- addr = PAGE_ALIGN(addr);
-
- vma = find_vma(mm, addr);
- if (TASK_SIZE - len >= addr &&
- (!vma || addr + len <= vm_start_gap(vma)))
- return addr;
- }
-
- info.flags = 0;
- info.length = len;
- info.low_limit = mm->mmap_base;
- info.high_limit = TASK_SIZE;
- info.align_mask = do_align ? (PAGE_MASK & (SHMLBA - 1)) : 0;
- info.align_offset = pgoff << PAGE_SHIFT;
- return vm_unmapped_area(&info);
-}