Merge branch 'tip-x86-mm' of git://git.kernel.org/pub/scm/linux/kernel/git/bp/bp into x86/urgent

Pull boot printout fix from Borislav Petkov.

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

1 files changed, 26 insertions, 2 deletions

diff --git a/arch/x86/mm/init.c b/arch/x86/mm/init.c
index 079c3b6a3ff1..7ff24240d863 100644
--- a/arch/x86/mm/init.c
+++ b/arch/x86/mm/init.c
@@ -238,6 +238,31 @@ static void __init_refok adjust_range_page_size_mask(struct map_range *mr,
         }
 }
 
+static const char *page_size_string(struct map_range *mr)
+{
+        static const char str_1g[] = "1G";
+        static const char str_2m[] = "2M";
+        static const char str_4m[] = "4M";
+        static const char str_4k[] = "4k";
+
+        if (mr->page_size_mask & (1<<PG_LEVEL_1G))
+                return str_1g;
+        /*
+         * 32-bit without PAE has a 4M large page size.
+         * PG_LEVEL_2M is misnamed, but we can at least
+         * print out the right size in the string.
+         */
+        if (IS_ENABLED(CONFIG_X86_32) &&
+            !IS_ENABLED(CONFIG_X86_PAE) &&
+            mr->page_size_mask & (1<<PG_LEVEL_2M))
+                return str_4m;
+
+        if (mr->page_size_mask & (1<<PG_LEVEL_2M))
+                return str_2m;
+
+        return str_4k;
+}
+
 static int __meminit split_mem_range(struct map_range *mr, int nr_range,
                                      unsigned long start,
                                      unsigned long end)
@@ -333,8 +358,7 @@ static int __meminit split_mem_range(struct map_range *mr, int nr_range,
         for (i = 0; i < nr_range; i++)
                 printk(KERN_DEBUG " [mem %#010lx-%#010lx] page %s\n",
                                 mr[i].start, mr[i].end - 1,
-                        (mr[i].page_size_mask & (1<<PG_LEVEL_1G))?"1G":(
-                         (mr[i].page_size_mask & (1<<PG_LEVEL_2M))?"2M":"4k"));
+                                page_size_string(&mr[i]));
 
         return nr_range;
 }