commit 46dea3d092d23a58b42499cc8a21de0fad079f4a
author Hugh Dickins <hugh@veritas.com> Sat Oct 29 18:16:20 2005 -0700
committer Linus Torvalds <torvalds@g5.osdl.org> Sat Oct 29 21:40:39 2005 -0700
tree 6ca46fb09d18e8ea51a354a1494cc742fcf2f2e7
parent f449952bc8bde7fbc73c6d20dff92b627a21f8b9

[PATCH] mm: ia64 use expand_upwards

ia64 has expand_backing_store function for growing its Register Backing Store
vma upwards.  But more complete code for this purpose is found in the
CONFIG_STACK_GROWSUP part of mm/mmap.c.  Uglify its #ifdefs further to provide
expand_upwards for ia64 as well as expand_stack for parisc.

The Register Backing Store vma should be marked VM_ACCOUNT.  Implement the
intention of growing it only a page at a time, instead of passing an address
outside of the vma to handle_mm_fault, with unknown consequences.

Signed-off-by: Hugh Dickins <hugh@veritas.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

arch/ia64/mm/init.c

diff --git a/arch/ia64/mm/init.c b/arch/ia64/mm/init.c
index 98246ac..0063b2c 100644
--- a/arch/ia64/mm/init.c
+++ b/arch/ia64/mm/init.c
@@ -158,7 +158,7 @@
 		vma->vm_start = current->thread.rbs_bot & PAGE_MASK;
 		vma->vm_end = vma->vm_start + PAGE_SIZE;
 		vma->vm_page_prot = protection_map[VM_DATA_DEFAULT_FLAGS & 0x7];
-		vma->vm_flags = VM_DATA_DEFAULT_FLAGS | VM_GROWSUP;
+		vma->vm_flags = VM_DATA_DEFAULT_FLAGS|VM_GROWSUP|VM_ACCOUNT;
 		down_write(&current->mm->mmap_sem);
 		if (insert_vm_struct(current->mm, vma)) {
 			up_write(&current->mm->mmap_sem);