nd_gen_sb
sum = nd_sb_checksum((struct nd_gen_sb *) super);
if (checksum != nd_sb_checksum((struct nd_gen_sb *) super))
u64 nd_sb_checksum(struct nd_gen_sb *nd_gen_sb)
BUILD_BUG_ON(sizeof(struct nd_gen_sb) != SZ_4K);
sum_save = nd_gen_sb->checksum;
nd_gen_sb->checksum = 0;
sum = nd_fletcher64(nd_gen_sb, sizeof(*nd_gen_sb), 1);
nd_gen_sb->checksum = sum_save;
u64 nd_sb_checksum(struct nd_gen_sb *sb);
if (checksum != nd_sb_checksum((struct nd_gen_sb *) pfn_sb))
checksum = nd_sb_checksum((struct nd_gen_sb *) pfn_sb);