Merge branches 'expcb.2026.07.24a', 'misc.2026.07.30a', 'rcu-tasks.2026.07.30a', 'srcu.2026.08.11a' and 'torture.2026.08.14a' into HEADgrafted

Changes:

Make expedited grace periods expedite normal RCU callbacks

Miscellaneous fixes:
 * Improve diagnostic output with character task states.
 * Mark accesses to inform KCSAN of concurrency design.
 * Move from kmalloc() to kmalloc_obj().
 * Documentation updates.
 * Improve handling of RCU deferred quiescent states.
 * Clean up unused function arguments and structure fields.
 * Reduce show_rcu_gp_kthreads() stack space.

Tasks RCU updates:
 * Clean up after SRCU re-implementation of Tasks Trace RCU.
 * Mark accesses to inform KCSAN of concurrency design.
 * Add ->lazy_timer status to diagnostic output.
 * Remove an unnecessary memory barrier.
 * Fix a data race, courtesy of KCSAN.
 * Documentation updates.
 * Convert cond_resched_tasks_rcu_qs() from macro to static inline
   function.

SRCU updates:
 * Add Rust helpers for SRCU.
 * Avoid losing queued work at cleanup_srcu_struct() time.

Torture-test updates:
 * Preparation work for immediate RCU priority deboosting.
 * Test RCU readers from real interrupt handlers (as opposed to softirq).
 * Simplify code through use of cpumask_next_wrap().
 * Improve diagnostic output with character task states.
 * Add rcutorture.nwriters parameter to allow lightweight stall testing,
   and rcutorture.stall_only to make doing so easier.
 * Test an RCU Tasks Trace grace period implying an RCU grace period.
 * Make RCU Tasks Trace torturing track reader batches.
 * Fix a data race, courtesy of KCSAN.
 * Plug a shuffle_tmp_mask memory leak on kthread spawn failure.

1 files changed, 67 insertions, 0 deletions

diff --git a/drivers/usb/Makefile b/drivers/usb/Makefile
new file mode 100644
index 000000000..eecbd631f
--- /dev/null
+++ b/drivers/usb/Makefile
@@ -0,0 +1,67 @@
+# SPDX-License-Identifier: GPL-2.0
+#
+# Makefile for the kernel USB device drivers.
+#
+
+# Object files in subdirectories
+
+obj-$(CONFIG_USB_COMMON)	+= common/
+obj-$(CONFIG_USB)		+= core/
+obj-$(CONFIG_USB_SUPPORT)	+= phy/
+
+obj-$(CONFIG_USB_DWC3)		+= dwc3/
+obj-$(CONFIG_USB_DWC2)		+= dwc2/
+obj-$(CONFIG_USB_ISP1760)	+= isp1760/
+
+obj-$(CONFIG_USB_CDNS_SUPPORT)	+= cdns3/
+
+obj-$(CONFIG_USB_FOTG210)	+= fotg210/
+
+obj-$(CONFIG_USB_MON)		+= mon/
+obj-$(CONFIG_USB_MTU3)		+= mtu3/
+
+obj-$(CONFIG_USB_PCI)		+= host/
+obj-$(CONFIG_USB_EHCI_HCD)	+= host/
+obj-$(CONFIG_USB_ISP116X_HCD)	+= host/
+obj-$(CONFIG_USB_OHCI_HCD)	+= host/
+obj-$(CONFIG_USB_UHCI_HCD)	+= host/
+obj-$(CONFIG_USB_FHCI_HCD)	+= host/
+obj-$(CONFIG_USB_XHCI_HCD)	+= host/
+obj-$(CONFIG_USB_SL811_HCD)	+= host/
+obj-$(CONFIG_USB_R8A66597_HCD)	+= host/
+obj-$(CONFIG_USB_FSL_USB2)	+= host/
+obj-$(CONFIG_USB_FOTG210_HCD)	+= host/
+obj-$(CONFIG_USB_MAX3421_HCD)	+= host/
+obj-$(CONFIG_USB_XEN_HCD)	+= host/
+
+obj-$(CONFIG_USB_C67X00_HCD)	+= c67x00/
+
+obj-$(CONFIG_USB_ACM)		+= class/
+obj-$(CONFIG_USB_PRINTER)	+= class/
+obj-$(CONFIG_USB_WDM)		+= class/
+obj-$(CONFIG_USB_TMC)		+= class/
+
+obj-$(CONFIG_USB_STORAGE)	+= storage/
+obj-$(CONFIG_USB)		+= storage/
+
+obj-$(CONFIG_USB_MDC800)	+= image/
+obj-$(CONFIG_USB_MICROTEK)	+= image/
+
+obj-$(CONFIG_USB_SERIAL)	+= serial/
+
+obj-$(CONFIG_USB)		+= misc/
+obj-$(CONFIG_EARLY_PRINTK_USB)	+= early/
+
+obj-$(CONFIG_USB_ATM)		+= atm/
+obj-$(CONFIG_USB_SPEEDTOUCH)	+= atm/
+
+obj-$(CONFIG_USB_MUSB_HDRC)	+= musb/
+obj-$(CONFIG_USB_CHIPIDEA)	+= chipidea/
+obj-$(CONFIG_USB_RENESAS_USBHS)	+= renesas_usbhs/
+obj-$(CONFIG_USB_GADGET)	+= gadget/
+
+obj-$(CONFIG_USBIP_CORE)	+= usbip/
+
+obj-$(CONFIG_TYPEC)		+= typec/
+
+obj-$(CONFIG_USB_ROLE_SWITCH)	+= roles/