Merge branch 'linus' into perf/core

Pick up the latest ring-buffer fixes, before applying a new fix.

Signed-off-by: Ingo Molnar <mingo@kernel.org>

1 files changed, 14 insertions, 6 deletions

diff --git a/mm/sparse.c b/mm/sparse.c
index 6a4bf9160e85..c7bb952400c8 100644
--- a/mm/sparse.c
+++ b/mm/sparse.c
@@ -275,8 +275,9 @@ static unsigned long * __init
 sparse_early_usemaps_alloc_pgdat_section(struct pglist_data *pgdat,
                                          unsigned long size)
 {
-        pg_data_t *host_pgdat;
-        unsigned long goal;
+        unsigned long goal, limit;
+        unsigned long *p;
+        int nid;
         /*
          * A page may contain usemaps for other sections preventing the
          * page being freed and making a section unremovable while
@@ -287,10 +288,17 @@ sparse_early_usemaps_alloc_pgdat_section(struct pglist_data *pgdat,
          * from the same section as the pgdat where possible to avoid
          * this problem.
          */
-        goal = __pa(pgdat) & PAGE_SECTION_MASK;
-        host_pgdat = NODE_DATA(early_pfn_to_nid(goal >> PAGE_SHIFT));
-        return __alloc_bootmem_node_nopanic(host_pgdat, size,
-                                            SMP_CACHE_BYTES, goal);
+        goal = __pa(pgdat) & (PAGE_SECTION_MASK << PAGE_SHIFT);
+        limit = goal + (1UL << PA_SECTION_SHIFT);
+        nid = early_pfn_to_nid(goal >> PAGE_SHIFT);
+again:
+        p = ___alloc_bootmem_node_nopanic(NODE_DATA(nid), size,
+                                          SMP_CACHE_BYTES, goal, limit);
+        if (!p && limit) {
+                limit = 0;
+                goto again;
+        }
+        return p;
 }
 
 static void __init check_usemap_section_nr(int nid, unsigned long *usemap)