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>

diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index fe361ae..a1a9021 100644 (file)
--- 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 32ba13b..c6d8131 100644 (file)
--- 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)
 {