mm/memblock: print memblock_remove

memblock_remove report is useful to see why MemTotal of /proc/meminfo
between two kernels makes difference.

Link: http://lkml.kernel.org/r/20180508104223.8028-1-minchan@kernel.orgSigned-off-by: Minchan Kim <minchan@kernel.org>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Acked-by: Michal Hocko <mhocko@suse.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

mm/memblock.c

@@ -697,6 +697,11 @@ static int __init_memblock memblock_remove_range(struct memblock_type *type,
 
 int __init_memblock memblock_remove(phys_addr_t base, phys_addr_t size)
 {
+	phys_addr_t end = base + size - 1;
+
+	memblock_dbg("memblock_remove: [%pa-%pa] %pS\n",
+		     &base, &end, (void *)_RET_IP_);
+
 	return memblock_remove_range(&memblock.memory, base, size);
 }