fs/f2fs/super.c

299 	fsparam_enum("discard_unit", Opt_discard_unit, f2fs_param_discard_unit),
1129 		F2FS_CTX_INFO(ctx).discard_unit = result.uint_32;
1458 		F2FS_CTX_INFO(ctx).discard_unit != DISCARD_UNIT_SECTION) {
1459 			f2fs_info(sbi, "Zoned block device doesn't need small discard, set discard_unit=section by default");
1460 			F2FS_CTX_INFO(ctx).discard_unit = DISCARD_UNIT_SECTION;
1650 		F2FS_OPTION(sbi).discard_unit = F2FS_CTX_INFO(ctx).discard_unit;
2279 		if (F2FS_OPTION(sbi).discard_unit == DISCARD_UNIT_BLOCK)
2280 			seq_printf(seq, ",discard_unit=%s", "block");
2281 		else if (F2FS_OPTION(sbi).discard_unit == DISCARD_UNIT_SEGMENT)
2282 			seq_printf(seq, ",discard_unit=%s", "segment");
2283 		else if (F2FS_OPTION(sbi).discard_unit == DISCARD_UNIT_SECTION)
2284 			seq_printf(seq, ",discard_unit=%s", "section");
2433 			F2FS_OPTION(sbi).discard_unit = DISCARD_UNIT_SECTION;
2435 			F2FS_OPTION(sbi).discard_unit = DISCARD_UNIT_BLOCK;
2723 		f2fs_warn(sbi, "switch discard_unit option is not allowed");