x86: memtest: wipe out test pattern from memory
Signed-off-by: Andreas Herrmann <andreas.herrmann3@amd.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
diff --git a/arch/x86/mm/memtest.c b/arch/x86/mm/memtest.c
index 3232397..9c52ef1 100644
--- a/arch/x86/mm/memtest.c
+++ b/arch/x86/mm/memtest.c
@@ -57,6 +57,29 @@
reserve_bad_mem(pattern, start_bad, last_bad + incr);
}
+static void __init do_one_pass(u64 pattern, u64 start, u64 end)
+{
+ u64 size = 0;
+
+ while (start < end) {
+ start = find_e820_area_size(start, &size, 1);
+
+ /* done ? */
+ if (start >= end)
+ break;
+ if (start + size > end)
+ size = end - start;
+
+ printk(KERN_INFO " %010llx - %010llx pattern %016llx\n",
+ (unsigned long long) start,
+ (unsigned long long) start + size,
+ (unsigned long long) cpu_to_be64(pattern));
+ memtest(pattern, start, size);
+
+ start += size;
+ }
+}
+
/* default is disabled */
static int memtest_pattern __initdata;
@@ -71,35 +94,22 @@
void __init early_memtest(unsigned long start, unsigned long end)
{
- u64 t_start, t_size;
unsigned int i;
- u64 pattern;
+ unsigned int idx = 0;
if (!memtest_pattern)
return;
printk(KERN_INFO "early_memtest: # of tests: %d\n", memtest_pattern);
for (i = 0; i < memtest_pattern; i++) {
- unsigned int idx = i % ARRAY_SIZE(patterns);
- pattern = patterns[idx];
- t_start = start;
- t_size = 0;
- while (t_start < end) {
- t_start = find_e820_area_size(t_start, &t_size, 1);
+ idx = i % ARRAY_SIZE(patterns);
+ do_one_pass(patterns[idx], start, end);
+ }
- /* done ? */
- if (t_start >= end)
- break;
- if (t_start + t_size > end)
- t_size = end - t_start;
-
- printk(KERN_INFO " %010llx - %010llx pattern %016llx\n",
- (unsigned long long) t_start,
- (unsigned long long) t_start + t_size,
- (unsigned long long) cpu_to_be64(pattern));
- memtest(pattern, t_start, t_size);
-
- t_start += t_size;
- }
+ if (idx > 0) {
+ printk(KERN_INFO "early_memtest: wipe out "
+ "test pattern from memory\n");
+ /* additional test with pattern 0 will do this */
+ do_one_pass(0, start, end);
}
}