---

yaml --- r: 356215 b: refs/heads/master c: 5a0d3ae h: refs/heads/master i: 356213: 2b887e8 356211: a718ceb 356207: 4509840 v: v3
git-mirror · Nov 17, 2012 · e5ab2c5 · e5ab2c5
1 parent 79dacde
commit e5ab2c5
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Showing 2 changed files with 13 additions and 19 deletions.
diff --git a/[refs] b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 11ed9e927d573d78beda6e6a166612666ae97064
+refs/heads/master: 5a0d3aeeeffbd1534a510fc10c4ab7c99c45afce
diff --git a/trunk/arch/x86/mm/init.c b/trunk/arch/x86/mm/init.c
@@ -218,13 +218,11 @@ static int __meminit split_mem_range(struct map_range *mr, int nr_range,
 	 * slowdowns.
 	 */
 	if (pos == 0)
-		end_pfn = 1<<(PMD_SHIFT - PAGE_SHIFT);
+		end_pfn = PMD_SIZE >> PAGE_SHIFT;
 	else
-		end_pfn = ((pos + (PMD_SIZE - 1))>>PMD_SHIFT)
-				 << (PMD_SHIFT - PAGE_SHIFT);
+		end_pfn = round_up(pos, PMD_SIZE) >> PAGE_SHIFT;
 #else /* CONFIG_X86_64 */
-	end_pfn = ((pos + (PMD_SIZE - 1)) >> PMD_SHIFT)
-			<< (PMD_SHIFT - PAGE_SHIFT);
+	end_pfn = round_up(pos, PMD_SIZE) >> PAGE_SHIFT;
 #endif
 	if (end_pfn > (end >> PAGE_SHIFT))
 		end_pfn = end >> PAGE_SHIFT;
@@ -234,15 +232,13 @@ static int __meminit split_mem_range(struct map_range *mr, int nr_range,
 	}
 
 	/* big page (2M) range */
-	start_pfn = ((pos + (PMD_SIZE - 1))>>PMD_SHIFT)
-			 << (PMD_SHIFT - PAGE_SHIFT);
+	start_pfn = round_up(pos, PMD_SIZE) >> PAGE_SHIFT;
 #ifdef CONFIG_X86_32
-	end_pfn = (end>>PMD_SHIFT) << (PMD_SHIFT - PAGE_SHIFT);
+	end_pfn = round_down(end, PMD_SIZE) >> PAGE_SHIFT;
 #else /* CONFIG_X86_64 */
-	end_pfn = ((pos + (PUD_SIZE - 1))>>PUD_SHIFT)
-			 << (PUD_SHIFT - PAGE_SHIFT);
-	if (end_pfn > ((end>>PMD_SHIFT)<<(PMD_SHIFT - PAGE_SHIFT)))
-		end_pfn = ((end>>PMD_SHIFT)<<(PMD_SHIFT - PAGE_SHIFT));
+	end_pfn = round_up(pos, PUD_SIZE) >> PAGE_SHIFT;
+	if (end_pfn > (round_down(end, PMD_SIZE) >> PAGE_SHIFT))
+		end_pfn = round_down(end, PMD_SIZE) >> PAGE_SHIFT;
 #endif
 
 	if (start_pfn < end_pfn) {
@@ -253,9 +249,8 @@ static int __meminit split_mem_range(struct map_range *mr, int nr_range,
 
 #ifdef CONFIG_X86_64
 	/* big page (1G) range */
-	start_pfn = ((pos + (PUD_SIZE - 1))>>PUD_SHIFT)
-			 << (PUD_SHIFT - PAGE_SHIFT);
-	end_pfn = (end >> PUD_SHIFT) << (PUD_SHIFT - PAGE_SHIFT);
+	start_pfn = round_up(pos, PUD_SIZE) >> PAGE_SHIFT;
+	end_pfn = round_down(end, PUD_SIZE) >> PAGE_SHIFT;
 	if (start_pfn < end_pfn) {
 		nr_range = save_mr(mr, nr_range, start_pfn, end_pfn,
 				page_size_mask &
@@ -264,9 +259,8 @@ static int __meminit split_mem_range(struct map_range *mr, int nr_range,
 	}
 
 	/* tail is not big page (1G) alignment */
-	start_pfn = ((pos + (PMD_SIZE - 1))>>PMD_SHIFT)
-			 << (PMD_SHIFT - PAGE_SHIFT);
-	end_pfn = (end >> PMD_SHIFT) << (PMD_SHIFT - PAGE_SHIFT);
+	start_pfn = round_up(pos, PMD_SIZE) >> PAGE_SHIFT;
+	end_pfn = round_down(end, PMD_SIZE) >> PAGE_SHIFT;
 	if (start_pfn < end_pfn) {
 		nr_range = save_mr(mr, nr_range, start_pfn, end_pfn,
 				page_size_mask & (1<<PG_LEVEL_2M));