moonjuice/kernel_arpi
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

mm: Add functions to lock invalidate_lock for two mappings

Browse Source 
Some operations such as reflinking blocks among files will need to lock
invalidate_lock for two mappings. Add helper functions to do that.

Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jan Kara <jack@suse.cz>
This commit is contained in:
Jan Kara
2021-05-24 13:02:30 +02:00
parent 730633f0b7
commit 7506ae6a70
2 changed files with 44 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

6
include/linux/fs.h
View File

@@ -849,6 +849,12 @@ static inline void filemap_invalidate_unlock_shared(
void lock_two_nondirectories(struct inode *, struct inode*);
void unlock_two_nondirectories(struct inode *, struct inode*);
void filemap_invalidate_lock_two(struct address_space *mapping1,
struct address_space *mapping2);
void filemap_invalidate_unlock_two(struct address_space *mapping1,
struct address_space *mapping2);
/*
* NOTE: in a 32bit arch with a preemptable kernel and
* an UP compile the i_size_read/write must be atomic