tjh.dev / kernel
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fs: remove stale and duplicate forward declarations

Remove the following unnecessary forward declarations from fs.h, which
improves maintainability.

- struct hd_geometry: became unused in fs.h when
block_device_operations was moved to blkdev.h in commit 08f858512151
("[PATCH] move block_device_operations to blkdev.h"). The forward
declaration is now added to blkdev.h where it is actually used.

- struct iovec: became unused when aio_read/aio_write were removed in
commit 8436318205b9 ("->aio_read and ->aio_write removed")

- struct iov_iter: duplicate forward declaration. This removes the
redundant second declaration, added in commit 293bc9822fa9
("new methods: ->read_iter() and ->write_iter()")

Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202512301303.s7YWTZHA-lkp@intel.com/
Closes: https://lore.kernel.org/oe-kbuild-all/202512302139.Wl0soAlz-lkp@intel.com/
Closes: https://lore.kernel.org/oe-kbuild-all/202512302105.pmzYfmcV-lkp@intel.com/
Closes: https://lore.kernel.org/oe-kbuild-all/202512302125.FNgHwu5z-lkp@intel.com/
Closes: https://lore.kernel.org/oe-kbuild-all/202512302108.nIV8r5ES-lkp@intel.com/
Signed-off-by: Yuto Ohnuki <ytohnuki@amazon.com>
Link: https://patch.msgid.link/20260226201857.27310-2-ytohnuki@amazon.com
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Christian Brauner <brauner@kernel.org>

authored by

Yuto Ohnuki and committed by
Christian Brauner 3d6bb84f 49e64d71

+1 -3
+1
include/linux/blkdev.h
··· 38 38 struct kiocb; 39 39 struct pr_ops; 40 40 struct rq_qos; 41 + struct hd_geometry; 41 42 struct blk_report_zones_args; 42 43 struct blk_queue_stats; 43 44 struct blk_stat_callback;
-3
include/linux/fs.h
··· 55 55 struct bio; 56 56 struct io_comp_batch; 57 57 struct fiemap_extent_info; 58 - struct hd_geometry; 59 - struct iovec; 60 58 struct kiocb; 61 59 struct kobject; 62 60 struct pipe_inode_info; ··· 1915 1917 */ 1916 1918 #define COPY_FILE_SPLICE (1 << 0) 1917 1919 1918 - struct iov_iter; 1919 1920 struct io_uring_cmd; 1920 1921 struct offset_ctx; 1921 1922