mm: use vm_unmapped_area() on frv architecture

Update the frv arch_get_unmapped_area function to make use of
vm_unmapped_area() instead of implementing a brute force search.

Signed-off-by: Michel Lespinasse <walken@google.com>
Acked-by: Rik van Riel <riel@redhat.com>
Acked-by: David Howells <dhowells@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/arch/frv/mm/elf-fdpic.c b/arch/frv/mm/elf-fdpic.c
index 385fd30b142f5cf28951373df0acd80cd45245c8..836f14707a627f156343154f359ac1f7758e9fd4 100644 (file)
--- a/arch/frv/mm/elf-fdpic.c
+++ b/arch/frv/mm/elf-fdpic.c
@@ -60,7 +60,7 @@ unsigned long arch_get_unmapped_area(struct file *filp, unsigned long addr, unsi
                                     unsigned long pgoff, unsigned long flags)
 {
        struct vm_area_struct *vma;
-       unsigned long limit;
+       struct vm_unmapped_area_info info;
 
        if (len > TASK_SIZE)
                return -ENOMEM;
@@ -79,39 +79,24 @@ unsigned long arch_get_unmapped_area(struct file *filp, unsigned long addr, unsi
        }
 
        /* search between the bottom of user VM and the stack grow area */
-       addr = PAGE_SIZE;
-       limit = (current->mm->start_stack - 0x00200000);
-       if (addr + len <= limit) {
-               limit -= len;
-
-               if (addr <= limit) {
-                       vma = find_vma(current->mm, PAGE_SIZE);
-                       for (; vma; vma = vma->vm_next) {
-                               if (addr > limit)
-                                       break;
-                               if (addr + len <= vma->vm_start)
-                                       goto success;
-                               addr = vma->vm_end;
-                       }
-               }
-       }
+       info.flags = 0;
+       info.length = len;
+       info.low_limit = PAGE_SIZE;
+       info.high_limit = (current->mm->start_stack - 0x00200000);
+       info.align_mask = 0;
+       info.align_offset = 0;
+       addr = vm_unmapped_area(&info);
+       if (!(addr & ~PAGE_MASK))
+               goto success;
+       VM_BUG_ON(addr != -ENOMEM);
 
        /* search from just above the WorkRAM area to the top of memory */
-       addr = PAGE_ALIGN(0x80000000);
-       limit = TASK_SIZE - len;
-       if (addr <= limit) {
-               vma = find_vma(current->mm, addr);
-               for (; vma; vma = vma->vm_next) {
-                       if (addr > limit)
-                               break;
-                       if (addr + len <= vma->vm_start)
-                               goto success;
-                       addr = vma->vm_end;
-               }
-
-               if (!vma && addr <= limit)
-                       goto success;
-       }
+       info.low_limit = PAGE_ALIGN(0x80000000);
+       info.high_limit = TASK_SIZE;
+       addr = vm_unmapped_area(&info);
+       if (!(addr & ~PAGE_MASK))
+               goto success;
+       VM_BUG_ON(addr != -ENOMEM);
 
 #if 0
        printk("[area] l=%lx (ENOMEM) f='%s'\n",