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Diffstat (limited to 'Documentation/filesystems/vfs.txt')
| -rw-r--r-- | Documentation/filesystems/vfs.txt | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/Documentation/filesystems/vfs.txt b/Documentation/filesystems/vfs.txt index 7737bfd03cf..ea271f2d395 100644 --- a/Documentation/filesystems/vfs.txt +++ b/Documentation/filesystems/vfs.txt @@ -617,6 +617,11 @@ struct address_space_operations { In this case the prepare_write will be retried one the lock is regained. + Note: the page _must not_ be marked uptodate in this function + (or anywhere else) unless it actually is uptodate right now. As + soon as a page is marked uptodate, it is possible for a concurrent + read(2) to copy it to userspace. + commit_write: If prepare_write succeeds, new data will be copied into the page and then commit_write will be called. It will typically update the size of the file (if appropriate) and |