From: Helge Deller <deller@gmx.de>
Date: Mon, 18 Sep 2017 15:55:24 +0000 (+0200)
Subject: parisc: Check if initrd was loaded into broken RAM
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=ea6976483fb0ced259fbaa9e4f68a2cdcee7e312;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git

parisc: Check if initrd was loaded into broken RAM

While scanning the PDT for reported broken memory modules, warn if the
initrd was coincidentally loaded into bad memory.

Signed-off-by: Helge Deller <deller@gmx.de>
---

diff --git a/arch/parisc/kernel/pdt.c b/arch/parisc/kernel/pdt.c
index 05730a83895c..00aed082969b 100644
--- a/arch/parisc/kernel/pdt.c
+++ b/arch/parisc/kernel/pdt.c
@@ -15,6 +15,7 @@
 #include <linux/memblock.h>
 #include <linux/seq_file.h>
 #include <linux/kthread.h>
+#include <linux/initrd.h>
 
 #include <asm/pdc.h>
 #include <asm/pdcpat.h>
@@ -216,8 +217,16 @@ void __init pdc_pdt_init(void)
 	}
 
 	for (i = 0; i < pdt_status.pdt_entries; i++) {
+		unsigned long addr;
+
 		report_mem_err(pdt_entry[i]);
 
+		addr = pdt_entry[i] & PDT_ADDR_PHYS_MASK;
+		if (IS_ENABLED(CONFIG_BLK_DEV_INITRD) &&
+			addr >= initrd_start && addr < initrd_end)
+			pr_crit("CRITICAL: initrd possibly broken "
+				"due to bad memory!\n");
+
 		/* mark memory page bad */
 		memblock_reserve(pdt_entry[i] & PAGE_MASK, PAGE_SIZE);
 	}