MIPS: Move arch_get_unmapped_area and gang to new file.

It never really belonged into syscall.c and it's about to become well more
complex.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

1 files changed, 0 insertions, 113 deletions

diff --git a/arch/mips/kernel/syscall.c b/arch/mips/kernel/syscall.c
index 0c207e8..d027657 100644
--- a/arch/mips/kernel/syscall.c
+++ b/arch/mips/kernel/syscall.c
@@ -10,12 +10,9 @@
 #include <linux/capability.h>
 #include <linux/errno.h>
 #include <linux/linkage.h>
-#include <linux/mm.h>
 #include <linux/fs.h>
 #include <linux/smp.h>
-#include <linux/mman.h>
 #include <linux/ptrace.h>
-#include <linux/sched.h>
 #include <linux/string.h>
 #include <linux/syscalls.h>
 #include <linux/file.h>
@@ -25,11 +22,9 @@
 #include <linux/msg.h>
 #include <linux/shm.h>
 #include <linux/compiler.h>
-#include <linux/module.h>
 #include <linux/ipc.h>
 #include <linux/uaccess.h>
 #include <linux/slab.h>
-#include <linux/random.h>
 #include <linux/elf.h>
 
 #include <asm/asm.h>
@@ -66,114 +61,6 @@ out:
 	return res;
 }
 
-unsigned long shm_align_mask = PAGE_SIZE - 1;	/* Sane caches */
-
-EXPORT_SYMBOL(shm_align_mask);
-
-#define COLOUR_ALIGN(addr,pgoff)				\
-	((((addr) + shm_align_mask) & ~shm_align_mask) +	\
-	 (((pgoff) << PAGE_SHIFT) & shm_align_mask))
-
-unsigned long arch_get_unmapped_area(struct file *filp, unsigned long addr,
-	unsigned long len, unsigned long pgoff, unsigned long flags)
-{
-	struct vm_area_struct * vmm;
-	int do_color_align;
-
-	if (len > TASK_SIZE)
-		return -ENOMEM;
-
-	if (flags & MAP_FIXED) {
-		/* Even MAP_FIXED mappings must reside within TASK_SIZE.  */
-		if (TASK_SIZE - len < addr)
-			return -EINVAL;
-
-		/*
-		 * We do not accept a shared mapping if it would violate
-		 * cache aliasing constraints.
-		 */
-		if ((flags & MAP_SHARED) &&
-		    ((addr - (pgoff << PAGE_SHIFT)) & shm_align_mask))
-			return -EINVAL;
-		return addr;
-	}
-
-	do_color_align = 0;
-	if (filp || (flags & MAP_SHARED))
-		do_color_align = 1;
-	if (addr) {
-		if (do_color_align)
-			addr = COLOUR_ALIGN(addr, pgoff);
-		else
-			addr = PAGE_ALIGN(addr);
-		vmm = find_vma(current->mm, addr);
-		if (TASK_SIZE - len >= addr &&
-		    (!vmm || addr + len <= vmm->vm_start))
-			return addr;
-	}
-	addr = current->mm->mmap_base;
-	if (do_color_align)
-		addr = COLOUR_ALIGN(addr, pgoff);
-	else
-		addr = PAGE_ALIGN(addr);
-
-	for (vmm = find_vma(current->mm, addr); ; vmm = vmm->vm_next) {
-		/* At this point:  (!vmm || addr < vmm->vm_end). */
-		if (TASK_SIZE - len < addr)
-			return -ENOMEM;
-		if (!vmm || addr + len <= vmm->vm_start)
-			return addr;
-		addr = vmm->vm_end;
-		if (do_color_align)
-			addr = COLOUR_ALIGN(addr, pgoff);
-	}
-}
-
-void arch_pick_mmap_layout(struct mm_struct *mm)
-{
-	unsigned long random_factor = 0UL;
-
-	if (current->flags & PF_RANDOMIZE) {
-		random_factor = get_random_int();
-		random_factor = random_factor << PAGE_SHIFT;
-		if (TASK_IS_32BIT_ADDR)
-			random_factor &= 0xfffffful;
-		else
-			random_factor &= 0xffffffful;
-	}
-
-	mm->mmap_base = TASK_UNMAPPED_BASE + random_factor;
-	mm->get_unmapped_area = arch_get_unmapped_area;
-	mm->unmap_area = arch_unmap_area;
-}
-
-static inline unsigned long brk_rnd(void)
-{
-	unsigned long rnd = get_random_int();
-
-	rnd = rnd << PAGE_SHIFT;
-	/* 8MB for 32bit, 256MB for 64bit */
-	if (TASK_IS_32BIT_ADDR)
-		rnd = rnd & 0x7ffffful;
-	else
-		rnd = rnd & 0xffffffful;
-
-	return rnd;
-}
-
-unsigned long arch_randomize_brk(struct mm_struct *mm)
-{
-	unsigned long base = mm->brk;
-	unsigned long ret;
-
-	ret = PAGE_ALIGN(base + brk_rnd());
-
-	if (ret < mm->brk)
-		return mm->brk;
-
-	return ret;
-}
-
 SYSCALL_DEFINE6(mips_mmap, unsigned long, addr, unsigned long, len,
 	unsigned long, prot, unsigned long, flags, unsigned long,
 	fd, off_t, offset)