From: Taotao Chen <chentaotao@xxxxxxxxxxxxxx> This patch series refactors the address_space_operations write_begin() and write_end() callbacks to take const struct kiocb * as their first argument, allowing IOCB flags such as IOCB_DONTCACHE to propagate to the filesystem's buffered I/O path. Ext4 is updated to implement handling of the IOCB_DONTCACHE flag and advertises support via the FOP_DONTCACHE file operation flag. Additionally, the i915 driver's shmem write paths are updated to bypass the legacy write_begin/write_end interface in favor of directly calling write_iter() with a constructed synchronous kiocb. Another i915 change replaces a manual write loop with kernel_write() during GEM shmem object creation. Tested with ext4 and i915 GEM workloads. This patch series is based on the vfs-6.17.misc branch. Changes since v2: - Changed all write_begin/write_end function signatures to take const struct kiocb * instead of struct kiocb *. - Merged the two ext4 patches into one for clarity. - Updated return type from int to ssize_t for kernel_write. - Minor formatting and comment improvements. Thanks to Matthew Wilcox for early feedback, and to all reviewers for detailed comments. Taotao Chen (4): drm/i915: Use kernel_write() in shmem object create drm/i915: Refactor shmem_pwrite() to use kiocb and write_iter fs: change write_begin/write_end interface to take struct kiocb * ext4: support uncached buffered I/O Documentation/filesystems/locking.rst | 4 +- Documentation/filesystems/vfs.rst | 6 +- block/fops.c | 13 ++- drivers/gpu/drm/i915/gem/i915_gem_shmem.c | 114 ++++++---------------- fs/adfs/inode.c | 9 +- fs/affs/file.c | 26 ++--- fs/bcachefs/fs-io-buffered.c | 4 +- fs/bcachefs/fs-io-buffered.h | 4 +- fs/bfs/file.c | 7 +- fs/buffer.c | 26 ++--- fs/ceph/addr.c | 10 +- fs/ecryptfs/mmap.c | 10 +- fs/exfat/file.c | 15 ++- fs/exfat/inode.c | 16 +-- fs/ext2/inode.c | 11 ++- fs/ext4/file.c | 3 +- fs/ext4/inode.c | 25 +++-- fs/f2fs/data.c | 8 +- fs/fat/inode.c | 18 ++-- fs/fuse/file.c | 14 ++- fs/hfs/hfs_fs.h | 2 +- fs/hfs/inode.c | 4 +- fs/hfsplus/hfsplus_fs.h | 6 +- fs/hfsplus/inode.c | 8 +- fs/hostfs/hostfs_kern.c | 8 +- fs/hpfs/file.c | 18 ++-- fs/hugetlbfs/inode.c | 9 +- fs/jffs2/file.c | 28 +++--- fs/jfs/inode.c | 16 +-- fs/libfs.c | 11 ++- fs/minix/inode.c | 7 +- fs/nfs/file.c | 8 +- fs/nilfs2/inode.c | 8 +- fs/ntfs3/file.c | 7 +- fs/ntfs3/inode.c | 7 +- fs/ntfs3/ntfs_fs.h | 10 +- fs/ocfs2/aops.c | 6 +- fs/omfs/file.c | 7 +- fs/orangefs/inode.c | 16 +-- fs/ubifs/file.c | 5 +- fs/udf/inode.c | 11 ++- fs/ufs/inode.c | 16 +-- fs/vboxsf/file.c | 5 +- include/linux/buffer_head.h | 4 +- include/linux/fs.h | 11 ++- mm/filemap.c | 4 +- mm/shmem.c | 12 +-- 47 files changed, 310 insertions(+), 287 deletions(-) -- 2.34.1
