s390/mm: add kasan shadow to the debugfs pgtable dump

This change adds address space markers for kasan shadow memory.
Reviewed-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

arch/s390/mm/dump_pagetables.c

@@ -3,6 +3,7 @@
 #include <linux/debugfs.h>
 #include <linux/sched.h>
 #include <linux/mm.h>
+#include <asm/kasan.h>
 #include <asm/sections.h>
 #include <asm/pgtable.h>
 
@@ -17,6 +18,10 @@ enum address_markers_idx {
 	IDENTITY_NR = 0,
 	KERNEL_START_NR,
 	KERNEL_END_NR,
+#ifdef CONFIG_KASAN
+	KASAN_SHADOW_START_NR,
+	KASAN_SHADOW_END_NR,
+#endif
 	VMEMMAP_NR,
 	VMALLOC_NR,
 	MODULES_NR,
@@ -26,6 +31,10 @@ static struct addr_marker address_markers[] = {
 	[IDENTITY_NR]		= {0, "Identity Mapping"},
 	[KERNEL_START_NR]	= {(unsigned long)_stext, "Kernel Image Start"},
 	[KERNEL_END_NR]		= {(unsigned long)_end, "Kernel Image End"},
+#ifdef CONFIG_KASAN
+	[KASAN_SHADOW_START_NR]	= {KASAN_SHADOW_START, "Kasan Shadow Start"},
+	[KASAN_SHADOW_END_NR]	= {KASAN_SHADOW_END, "Kasan Shadow End"},
+#endif
 	[VMEMMAP_NR]		= {0, "vmemmap Area"},
 	[VMALLOC_NR]		= {0, "vmalloc Area"},
 	[MODULES_NR]		= {0, "Modules Area"},