[PATCH] freepgt: remove MM_VM_SIZE(mm)

There's only one usage of MM_VM_SIZE(mm) left, and it's a troublesome macro
because mm doesn't contain the (32-bit emulation?) info needed.  But it too is
only needed because we ignore the end from the vma list.

We could make flush_pgtables return that end, or unmap_vmas.  Choose the
latter, since it's a natural fit with unmap_mapping_range_vma needing to know
its restart addr.  This does make more than minimal change, but if unmap_vmas
had returned the end before, this is how we'd have done it, rather than
storing the break_addr in zap_details.

unmap_vmas used to return count of vmas scanned, but that's just debug which
hasn't been useful in a while; and if we want the map_count 0 on exit check
back, it can easily come from the final remove_vm_struct loop.

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

1 files changed, 0 insertions, 4 deletions

diff --git a/include/asm-ppc64/processor.h b/include/asm-ppc64/processor.h
index cae65b30adb8..0035efe2db2b 100644
--- a/include/asm-ppc64/processor.h
+++ b/include/asm-ppc64/processor.h
@@ -542,10 +542,6 @@ extern struct task_struct *last_task_used_altivec;
 #define TASK_SIZE (test_thread_flag(TIF_32BIT) ? \
                 TASK_SIZE_USER32 : TASK_SIZE_USER64)
 
-/* We can't actually tell the TASK_SIZE given just the mm, but default
- * to the 64-bit case to make sure that enough gets cleaned up. */
-#define MM_VM_SIZE(mm)  TASK_SIZE_USER64
-
 /* This decides where the kernel will search for a free chunk of vm
  * space during mmap's.
  */