writeback: Export __inode_attach_wb()

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Commit c26339e1df ("ext4: Fix data integrity writeout issues in
nojournal mode") made ext4_mark_iloc_dirty() attach the inode to a wb
before marking it for metadata writeback in nojournal mode. This is the
first modular caller of inode_attach_wb() - all users of
__inode_attach_wb() so far were built-in - so with CONFIG_EXT4_FS=m and
CONFIG_CGROUP_WRITEBACK=y the build now fails at the modpost stage:

  ERROR: modpost: "__inode_attach_wb" [fs/ext4/ext4.ko] undefined!

Export the symbol. Use EXPORT_SYMBOL_GPL() to match the other cgroup
writeback exports in this file.

Fixes: c26339e1df ("ext4: Fix data integrity writeout issues in nojournal mode")
Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202607281811.F3c6kRvX-lkp@intel.com/
Signed-off-by: Christian Brauner (Amutable) <brauner@kernel.org>

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Christian Brauner 2026-07-28 14:04:26 +02:00

parent 28cb64a67b

commit 974d0be0cb

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fs/fs-writeback.c

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