x86: memtest bootparam

Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 17 insertions, 7 deletions

diff --git a/arch/x86/mm/init_64.c b/arch/x86/mm/init_64.c
index 52f54ee4559f..ae225c3ae9a8 100644
--- a/arch/x86/mm/init_64.c
+++ b/arch/x86/mm/init_64.c
@@ -427,7 +427,10 @@ static void __init init_gbpages(void)
                 direct_gbpages = 0;
 }
 
-static void __init memtest(unsigned long start_phys, unsigned long size, unsigned pattern)
+#ifdef CONFIG_MEMTEST_BOOTPARAM
+
+static void __init memtest(unsigned long start_phys, unsigned long size,
+                                 unsigned pattern)
 {
         unsigned long i;
         unsigned long *start;
@@ -486,11 +489,12 @@ static void __init memtest(unsigned long start_phys, unsigned long size, unsigne
 
 }
 
-static int __initdata memtest_pattern;
+static int memtest_pattern __initdata = CONFIG_MEMTEST_BOOTPARAM_VALUE;
+
 static int __init parse_memtest(char *arg)
 {
         if (arg)
-                memtest_pattern = simple_strtoul(arg, NULL, 0) + 1;
+                memtest_pattern = simple_strtoul(arg, NULL, 0);
         return 0;
 }
 
@@ -501,8 +505,10 @@ static void __init early_memtest(unsigned long start, unsigned long end)
         unsigned long t_start, t_size;
         unsigned pattern;
 
-        if (memtest_pattern)
-                printk(KERN_INFO "early_memtest: pattern num %d", memtest_pattern);
+        if (!memtest_pattern)
+                return;
+
+        printk(KERN_INFO "early_memtest: pattern num %d", memtest_pattern);
         for (pattern = 0; pattern < memtest_pattern; pattern++) {
                 t_start = start;
                 t_size = 0;
@@ -523,9 +529,13 @@ static void __init early_memtest(unsigned long start, unsigned long end)
                         t_start += t_size;
                 }
         }
-        if (memtest_pattern)
-                printk(KERN_CONT "\n");
+        printk(KERN_CONT "\n");
 }
+#else
+static void __init early_memtest(unsigned long start, unsigned long end)
+{
+}
+#endif
 
 /*
  * Setup the direct mapping of the physical memory at PAGE_OFFSET.