x86_64: simplify the memtest parameter setting

use CONFIG_MEMTEST only. if it is set, will have memtest=0 (disabled)

need to have memtest=4 in command line to test more patterns.

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

2 files changed, 10 insertions, 25 deletions

diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index fe361ae7ef2f..a1a9021146bc 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -419,35 +419,19 @@ config PARAVIRT
 
 endif
 
-config MEMTEST_BOOTPARAM
-        bool "Memtest boot parameter"
+config MEMTEST
+        bool "Memtest"
         depends on X86_64
         default y
         help
           This option adds a kernel parameter 'memtest', which allows memtest
-          to be disabled at boot.  If this option is selected, memtest
-          functionality can be disabled with memtest=0 on the kernel
-          command line.  The purpose of this option is to allow a single
-          kernel image to be distributed with memtest built in, but not
-          necessarily enabled.
-
+          to be set.
+                memtest=0, mean disabled; -- default
+                memtest=1, mean do 1 test pattern;
+                ...
+                memtest=4, mean do 4 test patterns.
           If you are unsure how to answer this question, answer Y.
 
-config MEMTEST_BOOTPARAM_VALUE
-        int "Memtest boot parameter default value (0-4)"
-        depends on MEMTEST_BOOTPARAM
-        range 0 4
-        default 0
-        help
-          This option sets the default value for the kernel parameter
-          'memtest', which allows memtest to be disabled at boot.  If this
-          option is set to 0 (zero), the memtest kernel parameter will
-          default to 0, disabling memtest at bootup.  If this option is
-          set to 4, the memtest kernel parameter will default to 4,
-          enabling memtest at bootup, and use that as pattern number.
-
-          If you are unsure how to answer this question, answer 0.
-
 config ACPI_SRAT
         def_bool y
         depends on X86_32 && ACPI && NUMA && (X86_SUMMIT || X86_GENERICARCH)
diff --git a/arch/x86/mm/init_64.c b/arch/x86/mm/init_64.c
index 32ba13b0f818..c6d81316db65 100644
--- a/arch/x86/mm/init_64.c
+++ b/arch/x86/mm/init_64.c
@@ -431,7 +431,7 @@ static void __init init_gbpages(void)
                 direct_gbpages = 0;
 }
 
-#ifdef CONFIG_MEMTEST_BOOTPARAM
+#ifdef CONFIG_MEMTEST
 
 static void __init memtest(unsigned long start_phys, unsigned long size,
                                  unsigned pattern)
@@ -493,7 +493,8 @@ static void __init memtest(unsigned long start_phys, unsigned long size,
 
 }
 
-static int memtest_pattern __initdata = CONFIG_MEMTEST_BOOTPARAM_VALUE;
+/* default is disabled */
+static int memtest_pattern __initdata;
 
 static int __init parse_memtest(char *arg)
 {