Subject: [PATCH 09/11] vfs: error out -EAGAIN if atime needs to be updated

From: Hao Xu <[email-masked]>
Date: Sun, 27 Aug 2023 21:28:33 +0800

From: Hao Xu <[email-masked]>

To enforce nowait semantics, error out -EAGAIN if atime needs to be
updated.

Signed-off-by: Hao Xu <[email-masked]>
---
 fs/inode.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/fs/inode.c b/fs/inode.c
index e83b836f2d09..32d81be65cf9 100644
--- a/fs/inode.c
+++ b/fs/inode.c
@@ -1970,6 +1970,9 @@ int touch_atime(const struct path *path, bool nowait)
 	if (!atime_needs_update(path, inode))
 		return 0;
 
+	if (nowait)
+		return -EAGAIN;
+
 	if (!sb_start_write_trylock(inode->i_sb))
 		return 0;
 
-- 
2.25.1