diff options
| author | Christoph Hellwig <[email protected]> | 2024-11-12 05:43:55 +0000 |
|---|---|---|
| committer | Christian Brauner <[email protected]> | 2024-11-12 13:44:26 +0000 |
| commit | 8182a8b39aa227f5b99b8d4d18f296b82ce4b94c (patch) | |
| tree | d07a9aacd6e2002c9bd18634528cf53e8516d989 /fs/fs-writeback.c | |
| parent | writeback: add a __releases annoation to wbc_attach_and_unlock_inode (diff) | |
| download | kernel-8182a8b39aa227f5b99b8d4d18f296b82ce4b94c.tar.gz kernel-8182a8b39aa227f5b99b8d4d18f296b82ce4b94c.zip | |
writeback: wbc_attach_fdatawrite_inode out of line
This allows exporting this high-level interface only while keeping
wbc_attach_and_unlock_inode private in fs-writeback.c and unexporting
__inode_attach_wb.
Signed-off-by: Christoph Hellwig <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Reviewed-by: Jan Kara <[email protected]>
Signed-off-by: Christian Brauner <[email protected]>
Diffstat (limited to 'fs/fs-writeback.c')
| -rw-r--r-- | fs/fs-writeback.c | 31 |
1 files changed, 27 insertions, 4 deletions
diff --git a/fs/fs-writeback.c b/fs/fs-writeback.c index 3fb115ae44b1..77db1f10023e 100644 --- a/fs/fs-writeback.c +++ b/fs/fs-writeback.c @@ -290,7 +290,6 @@ void __inode_attach_wb(struct inode *inode, struct folio *folio) if (unlikely(cmpxchg(&inode->i_wb, NULL, wb))) wb_put(wb); } -EXPORT_SYMBOL_GPL(__inode_attach_wb); /** * inode_cgwb_move_to_attached - put the inode onto wb->b_attached list @@ -731,8 +730,8 @@ bool cleanup_offline_cgwb(struct bdi_writeback *wb) * writeback completion, wbc_detach_inode() should be called. This is used * to track the cgroup writeback context. */ -void wbc_attach_and_unlock_inode(struct writeback_control *wbc, - struct inode *inode) +static void wbc_attach_and_unlock_inode(struct writeback_control *wbc, + struct inode *inode) __releases(&inode->i_lock) { if (!inode_cgwb_enabled(inode)) { @@ -763,7 +762,24 @@ void wbc_attach_and_unlock_inode(struct writeback_control *wbc, if (unlikely(wb_dying(wbc->wb) && !css_is_dying(wbc->wb->memcg_css))) inode_switch_wbs(inode, wbc->wb_id); } -EXPORT_SYMBOL_GPL(wbc_attach_and_unlock_inode); + +/** + * wbc_attach_fdatawrite_inode - associate wbc and inode for fdatawrite + * @wbc: writeback_control of interest + * @inode: target inode + * + * This function is to be used by __filemap_fdatawrite_range(), which is an + * alternative entry point into writeback code, and first ensures @inode is + * associated with a bdi_writeback and attaches it to @wbc. + */ +void wbc_attach_fdatawrite_inode(struct writeback_control *wbc, + struct inode *inode) +{ + spin_lock(&inode->i_lock); + inode_attach_wb(inode, NULL); + wbc_attach_and_unlock_inode(wbc, inode); +} +EXPORT_SYMBOL_GPL(wbc_attach_fdatawrite_inode); /** * wbc_detach_inode - disassociate wbc from inode and perform foreign detection @@ -1228,6 +1244,13 @@ static void bdi_split_work_to_wbs(struct backing_dev_info *bdi, } } +static inline void wbc_attach_and_unlock_inode(struct writeback_control *wbc, + struct inode *inode) + __releases(&inode->i_lock) +{ + spin_unlock(&inode->i_lock); +} + #endif /* CONFIG_CGROUP_WRITEBACK */ /* |