parisc: Check for broken memory in initrd

PATCH New Helge Deller 1 participant 1 message Sep 18, 2017 PA-RISC architecture

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Helge Deller

author maintainer

2017-09-18 15:55 UTC #0 lore raw

PATCH 1/1 parisc: Check for broken memory in initrd

While scanning the PDT for reported broken memory modules, check if the initrd may have been loaded in such broken regions.

Signed-off-by Helge Deller <[email protected]>

arch/parisc/kernel/pdt.c +9 -0

index 05730a8..00aed08 100644
@@ -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);
 	}