Merge tag 'locking-urgent-2026-09-20' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tipgrafted

Pull futex fix from Ingo Molnar:

 - Also allocate a default private futex hash on vfork() as well, to
   avoid races with (private) futex waiters (Peter Zijlstra)

* tag 'locking-urgent-2026-09-20' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  futex: Also allocate private hash on vfork()

1 files changed, 10 insertions, 0 deletions

diff --git a/rust/helpers/bitmap.c b/rust/helpers/bitmap.c
new file mode 100644
index 000000000..e4e9f4361
--- /dev/null
+++ b/rust/helpers/bitmap.c
@@ -0,0 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0
+
+#include <linux/bitmap.h>
+
+__rust_helper
+void rust_helper_bitmap_copy_and_extend(unsigned long *to, const unsigned long *from,
+		unsigned int count, unsigned int size)
+{
+	bitmap_copy_and_extend(to, from, count, size);
+}