aboutsummaryrefslogtreecommitdiff
path: root/lib
diff options
context:
space:
mode:
authorMatthew Wilcox <willy@infradead.org>2018-12-05 16:37:03 -0500
committerMatthew Wilcox <willy@infradead.org>2019-01-06 21:24:43 -0500
commit02669b17a433c242a40f01f14b691c9c9d1f8a13 (patch)
tree8795a3a5f799d8a6482929bce982da7818d8e3c4 /lib
parent490fd30f859572ac97a51faa31860869744ba97b (diff)
downloadlinux-stericsson-02669b17a433c242a40f01f14b691c9c9d1f8a13.tar.gz
XArray: Turn xa_init_flags into a static inline
A regular xa_init_flags() put all dynamically-initialised XArrays into the same locking class. That leads to lockdep believing that taking one XArray lock while holding another is a deadlock. It's possible to work around some of these situations with separate locking classes for irq/bh/regular XArrays, and SINGLE_DEPTH_NESTING, but that's ugly, and it doesn't work for all situations (where we have completely unrelated XArrays). Signed-off-by: Matthew Wilcox <willy@infradead.org>
Diffstat (limited to 'lib')
-rw-r--r--lib/xarray.c29
1 files changed, 0 insertions, 29 deletions
diff --git a/lib/xarray.c b/lib/xarray.c
index 5f3f9311de89..dda6026d202e 100644
--- a/lib/xarray.c
+++ b/lib/xarray.c
@@ -1251,35 +1251,6 @@ void *xas_find_conflict(struct xa_state *xas)
EXPORT_SYMBOL_GPL(xas_find_conflict);
/**
- * xa_init_flags() - Initialise an empty XArray with flags.
- * @xa: XArray.
- * @flags: XA_FLAG values.
- *
- * If you need to initialise an XArray with special flags (eg you need
- * to take the lock from interrupt context), use this function instead
- * of xa_init().
- *
- * Context: Any context.
- */
-void xa_init_flags(struct xarray *xa, gfp_t flags)
-{
- unsigned int lock_type;
- static struct lock_class_key xa_lock_irq;
- static struct lock_class_key xa_lock_bh;
-
- spin_lock_init(&xa->xa_lock);
- xa->xa_flags = flags;
- xa->xa_head = NULL;
-
- lock_type = xa_lock_type(xa);
- if (lock_type == XA_LOCK_IRQ)
- lockdep_set_class(&xa->xa_lock, &xa_lock_irq);
- else if (lock_type == XA_LOCK_BH)
- lockdep_set_class(&xa->xa_lock, &xa_lock_bh);
-}
-EXPORT_SYMBOL(xa_init_flags);
-
-/**
* xa_load() - Load an entry from an XArray.
* @xa: XArray.
* @index: index into array.