add-vmcore: add nodemask_t's size and NR_FREE_PAGES's value to vmcoreinfo_data

[2/3] Add nodemask_t's size and NR_FREE_PAGES's value to vmcoreinfo_data.
  The dump filetering command 'makedumpfile'(v1.1.6 or before) had assumed
  the above values, and it was not good from the reliability viewpoint.
  So makedumpfile v1.2.0 came to need these values and I created the patch
  to let the kernel output them.
  makedumpfile site:
  https://sourceforge.net/projects/makedumpfile/Signed-off-by: NKen'ichi Ohmichi <oomichi@mxs.nes.nec.co.jp>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

include/linux/kexec.h

@@ -132,11 +132,16 @@ unsigned long paddr_vmcoreinfo_note(void);
 #define SIZE(name) \
 	vmcoreinfo_append_str("SIZE(%s)=%lu\n", #name, \
 			      (unsigned long)sizeof(struct name))
+#define TYPEDEF_SIZE(name) \
+	vmcoreinfo_append_str("SIZE(%s)=%lu\n", #name, \
+			      (unsigned long)sizeof(name))
 #define OFFSET(name, field) \
 	vmcoreinfo_append_str("OFFSET(%s.%s)=%lu\n", #name, #field, \
 			      (unsigned long)&(((struct name *)0)->field))
 #define LENGTH(name, value) \
 	vmcoreinfo_append_str("LENGTH(%s)=%lu\n", #name, (unsigned long)value)
+#define NUMBER(name) \
+	vmcoreinfo_append_str("NUMBER(%s)=%ld\n", #name, (long)name)
 #define CONFIG(name) \
 	vmcoreinfo_append_str("CONFIG_%s=y\n", #name)
 

kernel/kexec.c

@@ -1218,6 +1218,7 @@ static int __init crash_save_vmcoreinfo_init(void)
 	SIZE(zone);
 	SIZE(free_area);
 	SIZE(list_head);
+	TYPEDEF_SIZE(nodemask_t);
 	OFFSET(page, flags);
 	OFFSET(page, _count);
 	OFFSET(page, mapping);
@@ -1237,6 +1238,7 @@ static int __init crash_save_vmcoreinfo_init(void)
 	OFFSET(list_head, next);
 	OFFSET(list_head, prev);
 	LENGTH(zone.free_area, MAX_ORDER);
+	NUMBER(NR_FREE_PAGES);
 
 	arch_crash_save_vmcoreinfo();