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, 34 insertions, 0 deletions

diff --git a/arch/arm64/tools/Makefile b/arch/arm64/tools/Makefile
new file mode 100644
index 000000000..a94b3d9ca
--- /dev/null
+++ b/arch/arm64/tools/Makefile
@@ -0,0 +1,34 @@
+# SPDX-License-Identifier: GPL-2.0
+
+gen := arch/$(ARCH)/include/generated
+kapi := $(gen)/asm
+
+kapisyshdr-y := cpucap-defs.h kernel-hwcap.h sysreg-defs.h
+
+kapi-hdrs-y := $(addprefix $(kapi)/, $(kapisyshdr-y))
+
+targets += $(addprefix ../../../, $(kapi-hdrs-y))
+
+PHONY += kapi
+
+all: $(syscall64) kapi
+
+kapi:   $(kapi-hdrs-y)
+
+quiet_cmd_gen_cpucaps = GEN     $@
+      cmd_gen_cpucaps = mkdir -p $(dir $@); $(AWK) -f $(real-prereqs) > $@
+
+quiet_cmd_gen_kernel_hwcap = GEN     $@
+      cmd_gen_kernel_hwcap = mkdir -p $(dir $@); /bin/sh -e $(real-prereqs) > $@
+
+quiet_cmd_gen_sysreg = GEN     $@
+      cmd_gen_sysreg = mkdir -p $(dir $@); $(AWK) -f $(real-prereqs) > $@
+
+$(kapi)/cpucap-defs.h: $(src)/gen-cpucaps.awk $(src)/cpucaps FORCE
+	$(call if_changed,gen_cpucaps)
+
+$(kapi)/kernel-hwcap.h: $(src)/gen-kernel-hwcaps.sh $(srctree)/arch/arm64/include/uapi/asm/hwcap.h FORCE
+	$(call if_changed,gen_kernel_hwcap)
+
+$(kapi)/sysreg-defs.h: $(src)/gen-sysreg.awk $(src)/sysreg FORCE
+	$(call if_changed,gen_sysreg)