mm: remove free_area_cache

Since all architectures have been converted to use vm_unmapped_area(),
there is no remaining use for the free_area_cache.

Signed-off-by: Michel Lespinasse <walken@google.com>
Acked-by: Rik van Riel <riel@redhat.com>
Cc: "James E.J. Bottomley" <jejb@parisc-linux.org>
Cc: "Luck, Tony" <tony.luck@intel.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: David Howells <dhowells@redhat.com>
Cc: Helge Deller <deller@gmx.de>
Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Cc: Matt Turner <mattst88@gmail.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Richard Henderson <rth@twiddle.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 0 insertions, 4 deletions

diff --git a/kernel/fork.c b/kernel/fork.c
index 6e6a1c11b3e5..66635c80a813 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -365,8 +365,6 @@ static int dup_mmap(struct mm_struct *mm, struct mm_struct *oldmm)
         mm->locked_vm = 0;
         mm->mmap = NULL;
         mm->mmap_cache = NULL;
-        mm->free_area_cache = oldmm->mmap_base;
-        mm->cached_hole_size = ~0UL;
         mm->map_count = 0;
         cpumask_clear(mm_cpumask(mm));
         mm->mm_rb = RB_ROOT;
@@ -540,8 +538,6 @@ static struct mm_struct *mm_init(struct mm_struct *mm, struct task_struct *p)
         mm->nr_ptes = 0;
         memset(&mm->rss_stat, 0, sizeof(mm->rss_stat));
         spin_lock_init(&mm->page_table_lock);
-        mm->free_area_cache = TASK_UNMAPPED_BASE;
-        mm->cached_hole_size = ~0UL;
         mm_init_aio(mm);
         mm_init_owner(mm, p);