From 9cc63f8bcd560c760d0b12e15bba8f81c86237cf Mon Sep 17 00:00:00 2001 From: "Paul E. McKenney" Date: Fri, 14 Aug 2026 15:43:51 -0700 Subject: 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 HEAD 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. --- tools/arch/xtensa/include/asm/barrier.h | 18 ++++++++++++ tools/arch/xtensa/include/uapi/asm/mman.h | 46 +++++++++++++++++++++++++++++++ 2 files changed, 64 insertions(+) create mode 100644 tools/arch/xtensa/include/asm/barrier.h create mode 100644 tools/arch/xtensa/include/uapi/asm/mman.h (limited to 'tools/arch/xtensa/include') diff --git a/tools/arch/xtensa/include/asm/barrier.h b/tools/arch/xtensa/include/asm/barrier.h new file mode 100644 index 000000000..583800bd7 --- /dev/null +++ b/tools/arch/xtensa/include/asm/barrier.h @@ -0,0 +1,18 @@ +/* + * Copied from the kernel sources to tools/: + * + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + * + * Copyright (C) 2001 - 2012 Tensilica Inc. + */ + +#ifndef _TOOLS_LINUX_XTENSA_SYSTEM_H +#define _TOOLS_LINUX_XTENSA_SYSTEM_H + +#define mb() ({ __asm__ __volatile__("memw" : : : "memory"); }) +#define rmb() barrier() +#define wmb() mb() + +#endif /* _TOOLS_LINUX_XTENSA_SYSTEM_H */ diff --git a/tools/arch/xtensa/include/uapi/asm/mman.h b/tools/arch/xtensa/include/uapi/asm/mman.h new file mode 100644 index 000000000..f2b08c990 --- /dev/null +++ b/tools/arch/xtensa/include/uapi/asm/mman.h @@ -0,0 +1,46 @@ +/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ +#ifndef TOOLS_ARCH_XTENSA_UAPI_ASM_MMAN_FIX_H +#define TOOLS_ARCH_XTENSA_UAPI_ASM_MMAN_FIX_H +#define MADV_DODUMP 17 +#define MADV_DOFORK 11 +#define MADV_DONTDUMP 16 +#define MADV_DONTFORK 10 +#define MADV_DONTNEED 4 +#define MADV_FREE 8 +#define MADV_HUGEPAGE 14 +#define MADV_MERGEABLE 12 +#define MADV_NOHUGEPAGE 15 +#define MADV_NORMAL 0 +#define MADV_RANDOM 1 +#define MADV_REMOVE 9 +#define MADV_SEQUENTIAL 2 +#define MADV_UNMERGEABLE 13 +#define MADV_WILLNEED 3 +#define MAP_ANONYMOUS 0x0800 +#define MAP_DENYWRITE 0x2000 +#define MAP_EXECUTABLE 0x4000 +#define MAP_FILE 0 +#define MAP_FIXED 0x010 +#define MAP_GROWSDOWN 0x1000 +#define MAP_HUGETLB 0x80000 +#define MAP_LOCKED 0x8000 +#define MAP_NONBLOCK 0x20000 +#define MAP_NORESERVE 0x0400 +#define MAP_POPULATE 0x10000 +#define MAP_STACK 0x40000 +#define PROT_EXEC 0x4 +#define PROT_GROWSDOWN 0x01000000 +#define PROT_GROWSUP 0x02000000 +#define PROT_NONE 0x0 +#define PROT_READ 0x1 +#define PROT_SEM 0x10 +#define PROT_WRITE 0x2 +/* MADV_HWPOISON is undefined on xtensa, fix it for perf */ +#define MADV_HWPOISON 100 +/* MADV_SOFT_OFFLINE is undefined on xtensa, fix it for perf */ +#define MADV_SOFT_OFFLINE 101 +/* MAP_32BIT is undefined on xtensa, fix it for perf */ +#define MAP_32BIT 0 +/* MAP_UNINITIALIZED is undefined on xtensa, fix it for perf */ +#define MAP_UNINITIALIZED 0 +#endif -- cgit v1.3.1