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, 140 insertions, 0 deletions

diff --git a/include/dt-bindings/clock/am4.h b/include/dt-bindings/clock/am4.h
new file mode 100644
index 000000000..a65b082e9
--- /dev/null
+++ b/include/dt-bindings/clock/am4.h
@@ -0,0 +1,140 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright 2017 Texas Instruments, Inc.
+ */
+#ifndef __DT_BINDINGS_CLK_AM4_H
+#define __DT_BINDINGS_CLK_AM4_H
+
+#define AM4_CLKCTRL_OFFSET	0x20
+#define AM4_CLKCTRL_INDEX(offset)	((offset) - AM4_CLKCTRL_OFFSET)
+
+/* l3s_tsc clocks */
+#define AM4_L3S_TSC_CLKCTRL_OFFSET	0x120
+#define AM4_L3S_TSC_CLKCTRL_INDEX(offset)	((offset) - AM4_L3S_TSC_CLKCTRL_OFFSET)
+#define AM4_L3S_TSC_ADC_TSC_CLKCTRL	AM4_L3S_TSC_CLKCTRL_INDEX(0x120)
+
+/* l4_wkup_aon clocks */
+#define AM4_L4_WKUP_AON_CLKCTRL_OFFSET	0x228
+#define AM4_L4_WKUP_AON_CLKCTRL_INDEX(offset)	((offset) - AM4_L4_WKUP_AON_CLKCTRL_OFFSET)
+#define AM4_L4_WKUP_AON_WKUP_M3_CLKCTRL	AM4_L4_WKUP_AON_CLKCTRL_INDEX(0x228)
+#define AM4_L4_WKUP_AON_COUNTER_32K_CLKCTRL	AM4_L4_WKUP_AON_CLKCTRL_INDEX(0x230)
+
+/* l4_wkup clocks */
+#define AM4_L4_WKUP_CLKCTRL_OFFSET	0x220
+#define AM4_L4_WKUP_CLKCTRL_INDEX(offset)	((offset) - AM4_L4_WKUP_CLKCTRL_OFFSET)
+#define AM4_L4_WKUP_L4_WKUP_CLKCTRL	AM4_L4_WKUP_CLKCTRL_INDEX(0x220)
+#define AM4_L4_WKUP_TIMER1_CLKCTRL	AM4_L4_WKUP_CLKCTRL_INDEX(0x328)
+#define AM4_L4_WKUP_WD_TIMER2_CLKCTRL	AM4_L4_WKUP_CLKCTRL_INDEX(0x338)
+#define AM4_L4_WKUP_I2C1_CLKCTRL	AM4_L4_WKUP_CLKCTRL_INDEX(0x340)
+#define AM4_L4_WKUP_UART1_CLKCTRL	AM4_L4_WKUP_CLKCTRL_INDEX(0x348)
+#define AM4_L4_WKUP_SMARTREFLEX0_CLKCTRL	AM4_L4_WKUP_CLKCTRL_INDEX(0x350)
+#define AM4_L4_WKUP_SMARTREFLEX1_CLKCTRL	AM4_L4_WKUP_CLKCTRL_INDEX(0x358)
+#define AM4_L4_WKUP_CONTROL_CLKCTRL	AM4_L4_WKUP_CLKCTRL_INDEX(0x360)
+#define AM4_L4_WKUP_GPIO1_CLKCTRL	AM4_L4_WKUP_CLKCTRL_INDEX(0x368)
+
+/* mpu clocks */
+#define AM4_MPU_MPU_CLKCTRL	AM4_CLKCTRL_INDEX(0x20)
+
+/* gfx_l3 clocks */
+#define AM4_GFX_L3_GFX_CLKCTRL	AM4_CLKCTRL_INDEX(0x20)
+
+/* l4_rtc clocks */
+#define AM4_L4_RTC_RTC_CLKCTRL	AM4_CLKCTRL_INDEX(0x20)
+
+/* l3 clocks */
+#define AM4_L3_L3_MAIN_CLKCTRL	AM4_CLKCTRL_INDEX(0x20)
+#define AM4_L3_AES_CLKCTRL	AM4_CLKCTRL_INDEX(0x28)
+#define AM4_L3_DES_CLKCTRL	AM4_CLKCTRL_INDEX(0x30)
+#define AM4_L3_L3_INSTR_CLKCTRL	AM4_CLKCTRL_INDEX(0x40)
+#define AM4_L3_OCMCRAM_CLKCTRL	AM4_CLKCTRL_INDEX(0x50)
+#define AM4_L3_SHAM_CLKCTRL	AM4_CLKCTRL_INDEX(0x58)
+#define AM4_L3_TPCC_CLKCTRL	AM4_CLKCTRL_INDEX(0x78)
+#define AM4_L3_TPTC0_CLKCTRL	AM4_CLKCTRL_INDEX(0x80)
+#define AM4_L3_TPTC1_CLKCTRL	AM4_CLKCTRL_INDEX(0x88)
+#define AM4_L3_TPTC2_CLKCTRL	AM4_CLKCTRL_INDEX(0x90)
+#define AM4_L3_L4_HS_CLKCTRL	AM4_CLKCTRL_INDEX(0xa0)
+
+/* l3s clocks */
+#define AM4_L3S_CLKCTRL_OFFSET	0x68
+#define AM4_L3S_CLKCTRL_INDEX(offset)	((offset) - AM4_L3S_CLKCTRL_OFFSET)
+#define AM4_L3S_VPFE0_CLKCTRL	AM4_L3S_CLKCTRL_INDEX(0x68)
+#define AM4_L3S_VPFE1_CLKCTRL	AM4_L3S_CLKCTRL_INDEX(0x70)
+#define AM4_L3S_GPMC_CLKCTRL	AM4_L3S_CLKCTRL_INDEX(0x220)
+#define AM4_L3S_ADC1_CLKCTRL	AM4_L3S_CLKCTRL_INDEX(0x230)
+#define AM4_L3S_MCASP0_CLKCTRL	AM4_L3S_CLKCTRL_INDEX(0x238)
+#define AM4_L3S_MCASP1_CLKCTRL	AM4_L3S_CLKCTRL_INDEX(0x240)
+#define AM4_L3S_MMC3_CLKCTRL	AM4_L3S_CLKCTRL_INDEX(0x248)
+#define AM4_L3S_QSPI_CLKCTRL	AM4_L3S_CLKCTRL_INDEX(0x258)
+#define AM4_L3S_USB_OTG_SS0_CLKCTRL	AM4_L3S_CLKCTRL_INDEX(0x260)
+#define AM4_L3S_USB_OTG_SS1_CLKCTRL	AM4_L3S_CLKCTRL_INDEX(0x268)
+
+/* pruss_ocp clocks */
+#define AM4_PRUSS_OCP_CLKCTRL_OFFSET	0x320
+#define AM4_PRUSS_OCP_CLKCTRL_INDEX(offset)	((offset) - AM4_PRUSS_OCP_CLKCTRL_OFFSET)
+#define AM4_PRUSS_OCP_PRUSS_CLKCTRL	AM4_PRUSS_OCP_CLKCTRL_INDEX(0x320)
+
+/* l4ls clocks */
+#define AM4_L4LS_CLKCTRL_OFFSET	0x420
+#define AM4_L4LS_CLKCTRL_INDEX(offset)	((offset) - AM4_L4LS_CLKCTRL_OFFSET)
+#define AM4_L4LS_L4_LS_CLKCTRL	AM4_L4LS_CLKCTRL_INDEX(0x420)
+#define AM4_L4LS_D_CAN0_CLKCTRL	AM4_L4LS_CLKCTRL_INDEX(0x428)
+#define AM4_L4LS_D_CAN1_CLKCTRL	AM4_L4LS_CLKCTRL_INDEX(0x430)
+#define AM4_L4LS_EPWMSS0_CLKCTRL	AM4_L4LS_CLKCTRL_INDEX(0x438)
+#define AM4_L4LS_EPWMSS1_CLKCTRL	AM4_L4LS_CLKCTRL_INDEX(0x440)
+#define AM4_L4LS_EPWMSS2_CLKCTRL	AM4_L4LS_CLKCTRL_INDEX(0x448)
+#define AM4_L4LS_EPWMSS3_CLKCTRL	AM4_L4LS_CLKCTRL_INDEX(0x450)
+#define AM4_L4LS_EPWMSS4_CLKCTRL	AM4_L4LS_CLKCTRL_INDEX(0x458)
+#define AM4_L4LS_EPWMSS5_CLKCTRL	AM4_L4LS_CLKCTRL_INDEX(0x460)
+#define AM4_L4LS_ELM_CLKCTRL	AM4_L4LS_CLKCTRL_INDEX(0x468)
+#define AM4_L4LS_GPIO2_CLKCTRL	AM4_L4LS_CLKCTRL_INDEX(0x478)
+#define AM4_L4LS_GPIO3_CLKCTRL	AM4_L4LS_CLKCTRL_INDEX(0x480)
+#define AM4_L4LS_GPIO4_CLKCTRL	AM4_L4LS_CLKCTRL_INDEX(0x488)
+#define AM4_L4LS_GPIO5_CLKCTRL	AM4_L4LS_CLKCTRL_INDEX(0x490)
+#define AM4_L4LS_GPIO6_CLKCTRL	AM4_L4LS_CLKCTRL_INDEX(0x498)
+#define AM4_L4LS_HDQ1W_CLKCTRL	AM4_L4LS_CLKCTRL_INDEX(0x4a0)
+#define AM4_L4LS_I2C2_CLKCTRL	AM4_L4LS_CLKCTRL_INDEX(0x4a8)
+#define AM4_L4LS_I2C3_CLKCTRL	AM4_L4LS_CLKCTRL_INDEX(0x4b0)
+#define AM4_L4LS_MAILBOX_CLKCTRL	AM4_L4LS_CLKCTRL_INDEX(0x4b8)
+#define AM4_L4LS_MMC1_CLKCTRL	AM4_L4LS_CLKCTRL_INDEX(0x4c0)
+#define AM4_L4LS_MMC2_CLKCTRL	AM4_L4LS_CLKCTRL_INDEX(0x4c8)
+#define AM4_L4LS_RNG_CLKCTRL	AM4_L4LS_CLKCTRL_INDEX(0x4e0)
+#define AM4_L4LS_SPI0_CLKCTRL	AM4_L4LS_CLKCTRL_INDEX(0x500)
+#define AM4_L4LS_SPI1_CLKCTRL	AM4_L4LS_CLKCTRL_INDEX(0x508)
+#define AM4_L4LS_SPI2_CLKCTRL	AM4_L4LS_CLKCTRL_INDEX(0x510)
+#define AM4_L4LS_SPI3_CLKCTRL	AM4_L4LS_CLKCTRL_INDEX(0x518)
+#define AM4_L4LS_SPI4_CLKCTRL	AM4_L4LS_CLKCTRL_INDEX(0x520)
+#define AM4_L4LS_SPINLOCK_CLKCTRL	AM4_L4LS_CLKCTRL_INDEX(0x528)
+#define AM4_L4LS_TIMER2_CLKCTRL	AM4_L4LS_CLKCTRL_INDEX(0x530)
+#define AM4_L4LS_TIMER3_CLKCTRL	AM4_L4LS_CLKCTRL_INDEX(0x538)
+#define AM4_L4LS_TIMER4_CLKCTRL	AM4_L4LS_CLKCTRL_INDEX(0x540)
+#define AM4_L4LS_TIMER5_CLKCTRL	AM4_L4LS_CLKCTRL_INDEX(0x548)
+#define AM4_L4LS_TIMER6_CLKCTRL	AM4_L4LS_CLKCTRL_INDEX(0x550)
+#define AM4_L4LS_TIMER7_CLKCTRL	AM4_L4LS_CLKCTRL_INDEX(0x558)
+#define AM4_L4LS_TIMER8_CLKCTRL	AM4_L4LS_CLKCTRL_INDEX(0x560)
+#define AM4_L4LS_TIMER9_CLKCTRL	AM4_L4LS_CLKCTRL_INDEX(0x568)
+#define AM4_L4LS_TIMER10_CLKCTRL	AM4_L4LS_CLKCTRL_INDEX(0x570)
+#define AM4_L4LS_TIMER11_CLKCTRL	AM4_L4LS_CLKCTRL_INDEX(0x578)
+#define AM4_L4LS_UART2_CLKCTRL	AM4_L4LS_CLKCTRL_INDEX(0x580)
+#define AM4_L4LS_UART3_CLKCTRL	AM4_L4LS_CLKCTRL_INDEX(0x588)
+#define AM4_L4LS_UART4_CLKCTRL	AM4_L4LS_CLKCTRL_INDEX(0x590)
+#define AM4_L4LS_UART5_CLKCTRL	AM4_L4LS_CLKCTRL_INDEX(0x598)
+#define AM4_L4LS_UART6_CLKCTRL	AM4_L4LS_CLKCTRL_INDEX(0x5a0)
+#define AM4_L4LS_OCP2SCP0_CLKCTRL	AM4_L4LS_CLKCTRL_INDEX(0x5b8)
+#define AM4_L4LS_OCP2SCP1_CLKCTRL	AM4_L4LS_CLKCTRL_INDEX(0x5c0)
+
+/* emif clocks */
+#define AM4_EMIF_CLKCTRL_OFFSET	0x720
+#define AM4_EMIF_CLKCTRL_INDEX(offset)	((offset) - AM4_EMIF_CLKCTRL_OFFSET)
+#define AM4_EMIF_EMIF_CLKCTRL	AM4_EMIF_CLKCTRL_INDEX(0x720)
+
+/* dss clocks */
+#define AM4_DSS_CLKCTRL_OFFSET	0xa20
+#define AM4_DSS_CLKCTRL_INDEX(offset)	((offset) - AM4_DSS_CLKCTRL_OFFSET)
+#define AM4_DSS_DSS_CORE_CLKCTRL	AM4_DSS_CLKCTRL_INDEX(0xa20)
+
+/* cpsw_125mhz clocks */
+#define AM4_CPSW_125MHZ_CLKCTRL_OFFSET	0xb20
+#define AM4_CPSW_125MHZ_CLKCTRL_INDEX(offset)	((offset) - AM4_CPSW_125MHZ_CLKCTRL_OFFSET)
+#define AM4_CPSW_125MHZ_CPGMAC0_CLKCTRL	AM4_CPSW_125MHZ_CLKCTRL_INDEX(0xb20)
+
+#endif