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

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From: Hao Xu <howeyxu@xxxxxxxxxxx>

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

Signed-off-by: Hao Xu <howeyxu@xxxxxxxxxxx>
 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;

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