bdev_try_to_free_page 2027 fs/block_dev.c if (super && super->s_op->bdev_try_to_free_page) bdev_try_to_free_page 2028 fs/block_dev.c return super->s_op->bdev_try_to_free_page(super, page, wait); bdev_try_to_free_page 1441 fs/ext4/super.c .bdev_try_to_free_page = bdev_try_to_free_page, bdev_try_to_free_page 1971 include/linux/fs.h int (*bdev_try_to_free_page)(struct super_block*, struct page*, gfp_t);