[PATCH] revert "mm: page_state fixes"

Hugh says:

page_alloc_cpu_notify() specifically contains code to

 		/* Add dead cpu's page_states to our own. */

which handles this more efficiently.

Cc: Hugh Dickins <hugh@veritas.com>
Cc: Nick Piggin <nickpiggin@yahoo.com.au>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 2 insertions, 1 deletions

diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index fd47494cb989..0b98f428b07b 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -1204,6 +1204,7 @@ static void __get_page_state(struct page_state *ret, int nr, cpumask_t *cpumask)
         int cpu = 0;
 
         memset(ret, 0, sizeof(*ret));
+        cpus_and(*cpumask, *cpumask, cpu_online_map);
 
         cpu = first_cpu(*cpumask);
         while (cpu < NR_CPUS) {
@@ -1256,7 +1257,7 @@ unsigned long read_page_state_offset(unsigned long offset)
         unsigned long ret = 0;
         int cpu;
 
-        for_each_cpu(cpu) {
+        for_each_online_cpu(cpu) {
                 unsigned long in;
 
                 in = (unsigned long)&per_cpu(page_states, cpu) + offset;