MIPS: Cleanup arch_get_unmapped_area

As noticed by Kevin Cernekee <cernekee@gmail.com> in
http://www.linux-mips.org/cgi-bin/extract-mesg.cgi?a=linux-mips&m=2011-05&i=BANLkTikq04wuK%3Dbz%2BLieavmm3oDtoYWKxg%40mail.gmail.com

Patchwork: https://patchwork.linux-mips.org/patch/2387/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

diff --git a/arch/mips/kernel/syscall.c b/arch/mips/kernel/syscall.c
index 58beabf..0c207e8 100644 (file)
--- a/arch/mips/kernel/syscall.c
+++ b/arch/mips/kernel/syscall.c
@@ -79,20 +79,13 @@ unsigned long arch_get_unmapped_area(struct file *filp, unsigned long addr,
 {
        struct vm_area_struct * vmm;
        int do_color_align;
-       unsigned long task_size;
 
-#ifdef CONFIG_32BIT
-       task_size = TASK_SIZE;
-#else /* Must be CONFIG_64BIT*/
-       task_size = test_thread_flag(TIF_32BIT_ADDR) ? TASK_SIZE32 : TASK_SIZE;
-#endif
-
-       if (len > task_size)
+       if (len > TASK_SIZE)
                return -ENOMEM;
 
        if (flags & MAP_FIXED) {
-               /* Even MAP_FIXED mappings must reside within task_size.  */
-               if (task_size - len < addr)
+               /* Even MAP_FIXED mappings must reside within TASK_SIZE.  */
+               if (TASK_SIZE - len < addr)
                        return -EINVAL;
 
                /*
@@ -114,7 +107,7 @@ unsigned long arch_get_unmapped_area(struct file *filp, unsigned long addr,
                else
                        addr = PAGE_ALIGN(addr);
                vmm = find_vma(current->mm, addr);
-               if (task_size - len >= addr &&
+               if (TASK_SIZE - len >= addr &&
                    (!vmm || addr + len <= vmm->vm_start))
                        return addr;
        }
@@ -126,7 +119,7 @@ unsigned long arch_get_unmapped_area(struct file *filp, unsigned long 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)
+               if (TASK_SIZE - len < addr)
                        return -ENOMEM;
                if (!vmm || addr + len <= vmm->vm_start)
                        return addr;