[PATCH v3] powerpc: wire up memtest

From: Christophe Leroy
Date: Fri Sep 28 2018 - 11:39:24 EST


Add call to early_memtest() so that kernel compiled with
CONFIG_MEMTEST really perform memtest at startup when requested
via 'memtest' boot parameter.

Tested-by: Daniel Axtens <dja@xxxxxxxxxx>
Signed-off-by: Christophe Leroy <christophe.leroy@xxxxxx>
---
v3: updated kernel parameters documentation to mention PPC

v2: moved the test after initmem_init() as PPC64 sets max_low_pfn later than PPC32.

Documentation/admin-guide/kernel-parameters.txt | 2 +-
arch/powerpc/kernel/setup-common.c | 3 +++
2 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
index 92eb1f42240d..a5ad67d5cb16 100644
--- a/Documentation/admin-guide/kernel-parameters.txt
+++ b/Documentation/admin-guide/kernel-parameters.txt
@@ -2404,7 +2404,7 @@
seconds. Use this parameter to check at some
other rate. 0 disables periodic checking.

- memtest= [KNL,X86,ARM] Enable memtest
+ memtest= [KNL,X86,ARM,PPC] Enable memtest
Format: <integer>
default : 0 <disable>
Specifies the number of memtest passes to be
diff --git a/arch/powerpc/kernel/setup-common.c b/arch/powerpc/kernel/setup-common.c
index 93fa0c99681e..9ca9db707bcb 100644
--- a/arch/powerpc/kernel/setup-common.c
+++ b/arch/powerpc/kernel/setup-common.c
@@ -33,6 +33,7 @@
#include <linux/serial_8250.h>
#include <linux/percpu.h>
#include <linux/memblock.h>
+#include <linux/bootmem.h>
#include <linux/of_platform.h>
#include <linux/hugetlb.h>
#include <asm/debugfs.h>
@@ -966,6 +967,8 @@ void __init setup_arch(char **cmdline_p)

initmem_init();

+ early_memtest(min_low_pfn << PAGE_SHIFT, max_low_pfn << PAGE_SHIFT);
+
#ifdef CONFIG_DUMMY_CONSOLE
conswitchp = &dummy_con;
#endif
--
2.13.3