From c6482cff95c77a3c1fc0120c6e8ef7b15f85439b Mon Sep 17 00:00:00 2001 From: Filipe Manana Date: Wed, 9 Jul 2025 15:03:54 +0100 Subject: [PATCH] btrfs: update function comment for btrfs_check_nocow_lock() The documentation for the @nowait parameter is missing, so add it. The @nowait parameter was added in commit 80f9d24130e4 ("btrfs: make btrfs_check_nocow_lock nowait compatible"), which forgot to update the function comment. Reviewed-by: Boris Burkov Signed-off-by: Filipe Manana Reviewed-by: David Sterba Signed-off-by: David Sterba --- fs/btrfs/file.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c index 37bf473f2132c..c2e83babdb8df 100644 --- a/fs/btrfs/file.c +++ b/fs/btrfs/file.c @@ -962,6 +962,7 @@ lock_and_cleanup_extent_if_need(struct btrfs_inode *inode, struct folio *folio, * @pos: File offset. * @write_bytes: The length to write, will be updated to the nocow writeable * range. + * @nowait: Indicate if we can block or not (non-blocking IO context). * * This function will flush ordered extents in the range to ensure proper * nocow checks. @@ -970,7 +971,8 @@ lock_and_cleanup_extent_if_need(struct btrfs_inode *inode, struct folio *folio, * > 0 If we can nocow, and updates @write_bytes. * 0 If we can't do a nocow write. * -EAGAIN If we can't do a nocow write because snapshoting of the inode's - * root is in progress. + * root is in progress or because we are in a non-blocking IO + * context and need to block (@nowait is true). * < 0 If an error happened. * * NOTE: Callers need to call btrfs_check_nocow_unlock() if we return > 0. -- 2.47.2