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authorMatthew Wilcox <willy@infradead.org>2019-02-06 13:07:11 -0500
committerMatthew Wilcox <willy@infradead.org>2019-02-06 13:12:15 -0500
commitfd9dc93e36231fb6d520e0edd467058fad4fd12d (patch)
treeaa7dc07e911ece5d69304e9e4bba1f9b937d8ce2 /lib
parent809ab9371ca0a96b44d9866ad82849410759a45b (diff)
downloadlinux-fd9dc93e36231fb6d520e0edd467058fad4fd12d.tar.bz2
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>
Diffstat (limited to 'lib')
-rw-r--r--lib/test_xarray.c4
-rw-r--r--lib/xarray.c4
2 files changed, 4 insertions, 4 deletions
diff --git a/lib/test_xarray.c b/lib/test_xarray.c
index 671a93ee09e6..9d894e93456c 100644
--- a/lib/test_xarray.c
+++ b/lib/test_xarray.c
@@ -346,7 +346,7 @@ static noinline void check_cmpxchg(struct xarray *xa)
XA_BUG_ON(xa, !xa_empty(xa));
XA_BUG_ON(xa, xa_store_index(xa, 12345678, GFP_KERNEL) != NULL);
- XA_BUG_ON(xa, xa_insert(xa, 12345678, xa, GFP_KERNEL) != -EEXIST);
+ XA_BUG_ON(xa, xa_insert(xa, 12345678, xa, GFP_KERNEL) != -EBUSY);
XA_BUG_ON(xa, xa_cmpxchg(xa, 12345678, SIX, FIVE, GFP_KERNEL) != LOTS);
XA_BUG_ON(xa, xa_cmpxchg(xa, 12345678, LOTS, FIVE, GFP_KERNEL) != LOTS);
XA_BUG_ON(xa, xa_cmpxchg(xa, 12345678, FIVE, LOTS, GFP_KERNEL) != FIVE);
@@ -388,7 +388,7 @@ static noinline void check_reserve(struct xarray *xa)
/* But xa_insert does not */
xa_reserve(xa, 12345678, GFP_KERNEL);
XA_BUG_ON(xa, xa_insert(xa, 12345678, xa_mk_value(12345678), 0) !=
- -EEXIST);
+ -EBUSY);
XA_BUG_ON(xa, xa_empty(xa));
XA_BUG_ON(xa, xa_erase(xa, 12345678) != NULL);
XA_BUG_ON(xa, !xa_empty(xa));
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));