- for (i = 0; i < 16; i++)
- if ((1 << i) & newsegs)
- if (prepare_low_seg_for_htlb(mm, i) != 0)
+ for (i = 0; i < NUM_LOW_AREAS; i++)
+ if ((1 << i) & newareas)
+ if (prepare_low_area_for_htlb(mm, i) != 0)
+ return -EBUSY;
+
+ mm->context.low_htlb_areas |= newareas;
+
+ /* update the paca copy of the context struct */
+ get_paca()->context = mm->context;
+
+ /* the context change must make it to memory before the flush,
+ * so that further SLB misses do the right thing. */
+ mb();
+ on_each_cpu(flush_low_segments, (void *)(unsigned long)newareas, 0, 1);
+
+ return 0;
+}
+
+static int open_high_hpage_areas(struct mm_struct *mm, u16 newareas)
+{
+ unsigned long i;
+
+ BUILD_BUG_ON((sizeof(newareas)*8) != NUM_HIGH_AREAS);
+ BUILD_BUG_ON((sizeof(mm->context.high_htlb_areas)*8)
+ != NUM_HIGH_AREAS);
+
+ newareas &= ~(mm->context.high_htlb_areas);
+ if (! newareas)
+ return 0; /* The areas we want are already open */
+
+ for (i = 0; i < NUM_HIGH_AREAS; i++)
+ if ((1 << i) & newareas)
+ if (prepare_high_area_for_htlb(mm, i) != 0)