Revert "Disable FOP_DONTCACHE for now due to bugs"

This reverts commit 478ad02d6844217cc7568619aeb0809d93ade43d.

Both the read and write side dirty && writeback races should be resolved
now, revert the commit that disabled FOP_DONTCACHE for filesystems.

Link: https://lore.kernel.org/linux-fsdevel/20250525083209.GS2023217@ZenIV/
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Link: https://lore.kernel.org/20250527133255.452431-4-axboe@kernel.dk
Signed-off-by: Christian Brauner <brauner@kernel.org>

diff --git a/include/linux/fs.h b/include/linux/fs.h
index 0db87f8e676cc8d022b28042bf6fd1af5f8928e3..57c3db3ef6adc5d366d2ce7958da3c2577219dc0 100644 (file)
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -2207,7 +2207,7 @@ struct file_operations {
 /* Supports asynchronous lock callbacks */
 #define FOP_ASYNC_LOCK         ((__force fop_flags_t)(1 << 6))
 /* File system supports uncached read/write buffered IO */
-#define FOP_DONTCACHE          0 /* ((__force fop_flags_t)(1 << 7)) */
+#define FOP_DONTCACHE          ((__force fop_flags_t)(1 << 7))
 
 /* Wrap a directory iterator that needs exclusive inode access */
 int wrap_directory_iterator(struct file *, struct dir_context *,