src/patches/suse-2.6.27.25/patches.arch/s390-03-02-setup_memory.patch

   1 From: Gerald Schaefer <geraldsc@de.ibm.com>
   2 Subject: kernel: Fix range for add_active_range() in setup_memory()
   3 References: bnc#440610
   4
   5 Symptom:     BUG_ON in move_freepages(), when the kernelcore parameter is
   6              specified and the last memory chunk is set offline.
   7 Problem:     add_active_range() expects start_pfn + size as end_pfn value,
   8              i.e. not the pfn of the last page frame but the one behind that.
   9              We used the pfn of the last page frame so far.
  10 Solution:    Use start_pfn + size as end_pfn value.
  11
  12 Acked-by: John Jolly <jjolly@suse.de>
  13 ---
  14  arch/s390/kernel/setup.c |    4 ++--
  15  1 file changed, 2 insertions(+), 2 deletions(-)
  16
  17 Index: linux-sles11/arch/s390/kernel/setup.c
  18 ===================================================================
  19 --- linux-sles11.orig/arch/s390/kernel/setup.c
  20 +++ linux-sles11/arch/s390/kernel/setup.c
  21 @@ -615,13 +615,13 @@ setup_memory(void)
  22                 if (memory_chunk[i].type != CHUNK_READ_WRITE)
  23                         continue;
  24                 start_chunk = PFN_DOWN(memory_chunk[i].addr);
  25 -               end_chunk = start_chunk + PFN_DOWN(memory_chunk[i].size) - 1;
  26 +               end_chunk = start_chunk + PFN_DOWN(memory_chunk[i].size);
  27                 end_chunk = min(end_chunk, end_pfn);
  28                 if (start_chunk >= end_chunk)
  29                         continue;
  30                 add_active_range(0, start_chunk, end_chunk);
  31                 pfn = max(start_chunk, start_pfn);
  32 -               for (; pfn <= end_chunk; pfn++)
  33 +               for (; pfn < end_chunk; pfn++)
  34                         page_set_storage_key(PFN_PHYS(pfn), PAGE_DEFAULT_KEY);
  35         }
  36