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>

1 files changed, 9 insertions, 0 deletions

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);
         }