Symbol: EXT_CSD_BOOT_WP
drivers/mmc/core/block.c
1142
ret = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_BOOT_WP,
drivers/mmc/core/mmc.c
511
card->ext_csd.boot_ro_lock = ext_csd[EXT_CSD_BOOT_WP];