XArray: Change xa_insert to return -EBUSY

Userspace translates EEXIST to "File exists" which isn't a very good
error message for the problem.  "Device or resource busy" is a better
indication of what went wrong.

Signed-off-by: Matthew Wilcox <willy@infradead.org>

1 files changed, 2 insertions, 2 deletions

diff --git a/lib/xarray.c b/lib/xarray.c
index fb783bf2a441..1b97ca58bd15 100644
--- a/lib/xarray.c
+++ b/lib/xarray.c
@@ -1451,7 +1451,7 @@ EXPORT_SYMBOL(__xa_cmpxchg);
  *
  * Context: Any context.  Expects xa_lock to be held on entry.  May
  * release and reacquire xa_lock if @gfp flags permit.
- * Return: 0 if the store succeeded.  -EEXIST if another entry was present.
+ * Return: 0 if the store succeeded.  -EBUSY if another entry was present.
  * -ENOMEM if memory could not be allocated.
  */
 int __xa_insert(struct xarray *xa, unsigned long index, void *entry, gfp_t gfp)
@@ -1471,7 +1471,7 @@ int __xa_insert(struct xarray *xa, unsigned long index, void *entry, gfp_t gfp)
                         if (xa_track_free(xa))
                                 xas_clear_mark(&xas, XA_FREE_MARK);
                 } else {
-                        xas_set_err(&xas, -EEXIST);
+                        xas_set_err(&xas, -EBUSY);
                 }
         } while (__xas_nomem(&xas, gfp));