diff options
Diffstat (limited to 'kernel')
80 files changed, 143 insertions, 140 deletions
diff --git a/kernel/Kconfig.freezer b/kernel/Kconfig.freezer index a3bb4cb52539..68646feefb3d 100644 --- a/kernel/Kconfig.freezer +++ b/kernel/Kconfig.freezer @@ -1,2 +1,3 @@ +# SPDX-License-Identifier: GPL-2.0-only config FREEZER def_bool PM_SLEEP || CGROUP_FREEZER diff --git a/kernel/Kconfig.hz b/kernel/Kconfig.hz index 2a202a846757..38ef6d06888e 100644 --- a/kernel/Kconfig.hz +++ b/kernel/Kconfig.hz @@ -1,3 +1,4 @@ +# SPDX-License-Identifier: GPL-2.0-only # # Timer Interrupt Frequency Configuration # diff --git a/kernel/Kconfig.locks b/kernel/Kconfig.locks index bf770d7556f7..e0852dc333ac 100644 --- a/kernel/Kconfig.locks +++ b/kernel/Kconfig.locks @@ -1,3 +1,4 @@ +# SPDX-License-Identifier: GPL-2.0-only # # The ARCH_INLINE foo is necessary because select ignores "depends on" # diff --git a/kernel/Kconfig.preempt b/kernel/Kconfig.preempt index 0fee5fe6c899..dc0b682ec2d9 100644 --- a/kernel/Kconfig.preempt +++ b/kernel/Kconfig.preempt @@ -1,3 +1,4 @@ +# SPDX-License-Identifier: GPL-2.0-only choice prompt "Preemption Model" diff --git a/kernel/bpf/devmap.c b/kernel/bpf/devmap.c index 191b79948424..1e525d70f833 100644 --- a/kernel/bpf/devmap.c +++ b/kernel/bpf/devmap.c @@ -164,6 +164,9 @@ static void dev_map_free(struct bpf_map *map) bpf_clear_redirect_map(map); synchronize_rcu(); + /* Make sure prior __dev_map_entry_free() have completed. */ + rcu_barrier(); + /* To ensure all pending flush operations have completed wait for flush * bitmap to indicate all flush_needed bits to be zero on _all_ cpus. * Because the above synchronize_rcu() ensures the map is disconnected diff --git a/kernel/bpf/hashtab.c b/kernel/bpf/hashtab.c index 192d32e77db3..0f2708fde5f7 100644 --- a/kernel/bpf/hashtab.c +++ b/kernel/bpf/hashtab.c @@ -527,18 +527,30 @@ static u32 htab_map_gen_lookup(struct bpf_map *map, struct bpf_insn *insn_buf) return insn - insn_buf; } -static void *htab_lru_map_lookup_elem(struct bpf_map *map, void *key) +static __always_inline void *__htab_lru_map_lookup_elem(struct bpf_map *map, + void *key, const bool mark) { struct htab_elem *l = __htab_map_lookup_elem(map, key); if (l) { - bpf_lru_node_set_ref(&l->lru_node); + if (mark) + bpf_lru_node_set_ref(&l->lru_node); return l->key + round_up(map->key_size, 8); } return NULL; } +static void *htab_lru_map_lookup_elem(struct bpf_map *map, void *key) +{ + return __htab_lru_map_lookup_elem(map, key, true); +} + +static void *htab_lru_map_lookup_elem_sys(struct bpf_map *map, void *key) +{ + return __htab_lru_map_lookup_elem(map, key, false); +} + static u32 htab_lru_map_gen_lookup(struct bpf_map *map, struct bpf_insn *insn_buf) { @@ -1250,6 +1262,7 @@ const struct bpf_map_ops htab_lru_map_ops = { .map_free = htab_map_free, .map_get_next_key = htab_map_get_next_key, .map_lookup_elem = htab_lru_map_lookup_elem, + .map_lookup_elem_sys_only = htab_lru_map_lookup_elem_sys, .map_update_elem = htab_lru_map_update_elem, .map_delete_elem = htab_lru_map_delete_elem, .map_gen_lookup = htab_lru_map_gen_lookup, @@ -1281,7 +1294,6 @@ static void *htab_lru_percpu_map_lookup_elem(struct bpf_map *map, void *key) int bpf_percpu_hash_copy(struct bpf_map *map, void *key, void *value) { - struct bpf_htab *htab = container_of(map, struct bpf_htab, map); struct htab_elem *l; void __percpu *pptr; int ret = -ENOENT; @@ -1297,8 +1309,9 @@ int bpf_percpu_hash_copy(struct bpf_map *map, void *key, void *value) l = __htab_map_lookup_elem(map, key); if (!l) goto out; - if (htab_is_lru(htab)) - bpf_lru_node_set_ref(&l->lru_node); + /* We do not mark LRU map element here in order to not mess up + * eviction heuristics when user space does a map walk. + */ pptr = htab_elem_get_ptr(l, map->key_size); for_each_possible_cpu(cpu) { bpf_long_memcpy(value + off, diff --git a/kernel/bpf/inode.c b/kernel/bpf/inode.c index bc53e5b20ddc..84a80b02db99 100644 --- a/kernel/bpf/inode.c +++ b/kernel/bpf/inode.c @@ -518,7 +518,7 @@ out: static struct bpf_prog *__get_prog_inode(struct inode *inode, enum bpf_prog_type type) { struct bpf_prog *prog; - int ret = inode_permission(inode, MAY_READ | MAY_WRITE); + int ret = inode_permission(inode, MAY_READ); if (ret) return ERR_PTR(ret); diff --git a/kernel/bpf/syscall.c b/kernel/bpf/syscall.c index ad3ccf82f31d..cb5440b02e82 100644 --- a/kernel/bpf/syscall.c +++ b/kernel/bpf/syscall.c @@ -808,7 +808,10 @@ static int map_lookup_elem(union bpf_attr *attr) err = map->ops->map_peek_elem(map, value); } else { rcu_read_lock(); - ptr = map->ops->map_lookup_elem(map, key); + if (map->ops->map_lookup_elem_sys_only) + ptr = map->ops->map_lookup_elem_sys_only(map, key); + else + ptr = map->ops->map_lookup_elem(map, key); if (IS_ERR(ptr)) { err = PTR_ERR(ptr); } else if (!ptr) { diff --git a/kernel/bpf/tnum.c b/kernel/bpf/tnum.c index 938d41211be7..ca52b9642943 100644 --- a/kernel/bpf/tnum.c +++ b/kernel/bpf/tnum.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0-only /* tnum: tracked (or tristate) numbers * * A tnum tracks knowledge about the bits of a value. Each bit can be either diff --git a/kernel/cgroup/cgroup-v1.c b/kernel/cgroup/cgroup-v1.c index 68ca5de7ec27..88006be40ea3 100644 --- a/kernel/cgroup/cgroup-v1.c +++ b/kernel/cgroup/cgroup-v1.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0-only #include "cgroup-internal.h" #include <linux/ctype.h> diff --git a/kernel/cgroup/rstat.c b/kernel/cgroup/rstat.c index bb95a35e8c2d..ca19b4c8acf5 100644 --- a/kernel/cgroup/rstat.c +++ b/kernel/cgroup/rstat.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0-only #include "cgroup-internal.h" #include <linux/sched/cputime.h> diff --git a/kernel/context_tracking.c b/kernel/context_tracking.c index 9ad37b9e44a7..be01a4d627c9 100644 --- a/kernel/context_tracking.c +++ b/kernel/context_tracking.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * Context tracking: Probe on high level context boundaries such as kernel * and userspace. This includes syscalls and exceptions entry/exit. diff --git a/kernel/crash_dump.c b/kernel/crash_dump.c index b64e238b553b..9c23ae074b40 100644 --- a/kernel/crash_dump.c +++ b/kernel/crash_dump.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0-only #include <linux/kernel.h> #include <linux/crash_dump.h> #include <linux/init.h> diff --git a/kernel/cred.c b/kernel/cred.c index 45d77284aed0..e74ffdc98a92 100644 --- a/kernel/cred.c +++ b/kernel/cred.c @@ -1,12 +1,8 @@ +// SPDX-License-Identifier: GPL-2.0-or-later /* Task credentials management - see Documentation/security/credentials.rst * * Copyright (C) 2008 Red Hat, Inc. All Rights Reserved. * Written by David Howells (dhowells@redhat.com) - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public Licence - * as published by the Free Software Foundation; either version - * 2 of the Licence, or (at your option) any later version. */ #include <linux/export.h> #include <linux/cred.h> diff --git a/kernel/debug/Makefile b/kernel/debug/Makefile index a85edc339985..332ee6c6ec2c 100644 --- a/kernel/debug/Makefile +++ b/kernel/debug/Makefile @@ -1,3 +1,4 @@ +# SPDX-License-Identifier: GPL-2.0-only # # Makefile for the linux kernel debugger # diff --git a/kernel/delayacct.c b/kernel/delayacct.c index 2a12b988c717..27725754ac99 100644 --- a/kernel/delayacct.c +++ b/kernel/delayacct.c @@ -1,16 +1,7 @@ +// SPDX-License-Identifier: GPL-2.0-or-later /* delayacct.c - per-task delay accounting * * Copyright (C) Shailabh Nagar, IBM Corp. 2006 - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it would be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See - * the GNU General Public License for more details. */ #include <linux/sched.h> diff --git a/kernel/dma/Kconfig b/kernel/dma/Kconfig index 83d711f8d665..70f8f8d9200e 100644 --- a/kernel/dma/Kconfig +++ b/kernel/dma/Kconfig @@ -1,3 +1,4 @@ +# SPDX-License-Identifier: GPL-2.0-only config HAS_DMA bool diff --git a/kernel/dma/swiotlb.c b/kernel/dma/swiotlb.c index 6f7619c1f877..13f0cb080a4d 100644 --- a/kernel/dma/swiotlb.c +++ b/kernel/dma/swiotlb.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * Dynamic DMA mapping support. * diff --git a/kernel/exit.c b/kernel/exit.c index 8361a560cd1d..1803efb2922f 100644 --- a/kernel/exit.c +++ b/kernel/exit.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * linux/kernel/exit.c * diff --git a/kernel/fork.c b/kernel/fork.c index b4cba953040a..b2b87d450b80 100644 --- a/kernel/fork.c +++ b/kernel/fork.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * linux/kernel/fork.c * diff --git a/kernel/freezer.c b/kernel/freezer.c index b162b74611e4..c0738424bb43 100644 --- a/kernel/freezer.c +++ b/kernel/freezer.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * kernel/freezer.c - Function to freeze a process * diff --git a/kernel/gcov/Kconfig b/kernel/gcov/Kconfig index f71c1adcff31..3941a9c48f83 100644 --- a/kernel/gcov/Kconfig +++ b/kernel/gcov/Kconfig @@ -1,3 +1,4 @@ +# SPDX-License-Identifier: GPL-2.0-only menu "GCOV-based kernel profiling" config GCOV_KERNEL diff --git a/kernel/hung_task.c b/kernel/hung_task.c index f108a95882c6..14a625c16cb3 100644 --- a/kernel/hung_task.c +++ b/kernel/hung_task.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * Detect Hung Task * diff --git a/kernel/irq/Kconfig b/kernel/irq/Kconfig index 8fee06625c37..f92d9a687372 100644 --- a/kernel/irq/Kconfig +++ b/kernel/irq/Kconfig @@ -1,3 +1,4 @@ +# SPDX-License-Identifier: GPL-2.0-only menu "IRQ subsystem" # Options selectable by the architecture code diff --git a/kernel/irq_work.c b/kernel/irq_work.c index 73288914ed5e..d42acaf81886 100644 --- a/kernel/irq_work.c +++ b/kernel/irq_work.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * Copyright (C) 2010 Red Hat, Inc., Peter Zijlstra * diff --git a/kernel/jump_label.c b/kernel/jump_label.c index de6efdecc70d..0bfa10f4410c 100644 --- a/kernel/jump_label.c +++ b/kernel/jump_label.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * jump label support * diff --git a/kernel/kallsyms.c b/kernel/kallsyms.c index 14934afa9e68..95a260f9214b 100644 --- a/kernel/kallsyms.c +++ b/kernel/kallsyms.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * kallsyms.c: in-kernel printing of symbolic oopses and stack traces. * diff --git a/kernel/kthread.c b/kernel/kthread.c index be4e8795561a..621467c33fef 100644 --- a/kernel/kthread.c +++ b/kernel/kthread.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0-only /* Kernel thread helper functions. * Copyright (C) 2004 IBM Corporation, Rusty Russell. * diff --git a/kernel/livepatch/Kconfig b/kernel/livepatch/Kconfig index ec4565122e65..54102deb50ba 100644 --- a/kernel/livepatch/Kconfig +++ b/kernel/livepatch/Kconfig @@ -1,3 +1,4 @@ +# SPDX-License-Identifier: GPL-2.0-only config HAVE_LIVEPATCH bool help diff --git a/kernel/livepatch/Makefile b/kernel/livepatch/Makefile index b36ceda6488e..cf9b5bcdb952 100644 --- a/kernel/livepatch/Makefile +++ b/kernel/livepatch/Makefile @@ -1,3 +1,4 @@ +# SPDX-License-Identifier: GPL-2.0-only obj-$(CONFIG_LIVEPATCH) += livepatch.o livepatch-objs := core.o patch.o shadow.o transition.o diff --git a/kernel/livepatch/core.c b/kernel/livepatch/core.c index 91cd519756d3..2398832947c6 100644 --- a/kernel/livepatch/core.c +++ b/kernel/livepatch/core.c @@ -1,21 +1,9 @@ +// SPDX-License-Identifier: GPL-2.0-or-later /* * core.c - Kernel Live Patching Core * * Copyright (C) 2014 Seth Jennings <sjenning@redhat.com> * Copyright (C) 2014 SUSE - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * as published by the Free Software Foundation; either version 2 - * of the License, or (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, see <http://www.gnu.org/licenses/>. */ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt diff --git a/kernel/livepatch/patch.c b/kernel/livepatch/patch.c index 99cb3ad05eb4..bd43537702bd 100644 --- a/kernel/livepatch/patch.c +++ b/kernel/livepatch/patch.c @@ -1,22 +1,10 @@ +// SPDX-License-Identifier: GPL-2.0-or-later /* * patch.c - livepatch patching functions * * Copyright (C) 2014 Seth Jennings <sjenning@redhat.com> * Copyright (C) 2014 SUSE * Copyright (C) 2015 Josh Poimboeuf <jpoimboe@redhat.com> - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * as published by the Free Software Foundation; either version 2 - * of the License, or (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, see <http://www.gnu.org/licenses/>. */ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt diff --git a/kernel/livepatch/shadow.c b/kernel/livepatch/shadow.c index 83958c814439..e5c9fb295ba9 100644 --- a/kernel/livepatch/shadow.c +++ b/kernel/livepatch/shadow.c @@ -1,22 +1,10 @@ +// SPDX-License-Identifier: GPL-2.0-or-later /* * shadow.c - Shadow Variables * * Copyright (C) 2014 Josh Poimboeuf <jpoimboe@redhat.com> * Copyright (C) 2014 Seth Jennings <sjenning@redhat.com> * Copyright (C) 2017 Joe Lawrence <joe.lawrence@redhat.com> - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * as published by the Free Software Foundation; either version 2 - * of the License, or (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, see <http://www.gnu.org/licenses/>. */ /** diff --git a/kernel/livepatch/transition.c b/kernel/livepatch/transition.c index c53370d596be..abb2a4a2cbb2 100644 --- a/kernel/livepatch/transition.c +++ b/kernel/livepatch/transition.c @@ -1,20 +1,8 @@ +// SPDX-License-Identifier: GPL-2.0-or-later /* * transition.c - Kernel Live Patching transition functions * * Copyright (C) 2015-2016 Josh Poimboeuf <jpoimboe@redhat.com> - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * as published by the Free Software Foundation; either version 2 - * of the License, or (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, see <http://www.gnu.org/licenses/>. */ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt diff --git a/kernel/locking/lock_events.h b/kernel/locking/lock_events.h index feb1acc54611..46b71af8eef2 100644 --- a/kernel/locking/lock_events.h +++ b/kernel/locking/lock_events.h @@ -31,12 +31,50 @@ enum lock_events { DECLARE_PER_CPU(unsigned long, lockevents[lockevent_num]); /* + * The purpose of the lock event counting subsystem is to provide a low + * overhead way to record the number of specific locking events by using + * percpu counters. It is the percpu sum that matters, not specifically + * how many of them happens in each cpu. + * + * It is possible that the same percpu counter may be modified in both + * the process and interrupt contexts. For architectures that perform + * percpu operation with multiple instructions, it is possible to lose + * count if a process context percpu update is interrupted in the middle + * and the same counter is updated in the interrupt context. Therefore, + * the generated percpu sum may not be precise. The error, if any, should + * be small and insignificant. + * + * For those architectures that do multi-instruction percpu operation, + * preemption in the middle and moving the task to another cpu may cause + * a larger error in the count. Again, this will be few and far between. + * Given the imprecise nature of the count and the possibility of resetting + * the count and doing the measurement again, this is not really a big + * problem. + * + * To get a better picture of what is happening under the hood, it is + * suggested that a few measurements should be taken with the counts + * reset in between to stamp out outliner because of these possible + * error conditions. + * + * To minimize overhead, we use __this_cpu_*() in all cases except when + * CONFIG_DEBUG_PREEMPT is defined. In this particular case, this_cpu_*() + * will be used to avoid the appearance of unwanted BUG messages. + */ +#ifdef CONFIG_DEBUG_PREEMPT +#define lockevent_percpu_inc(x) this_cpu_inc(x) +#define lockevent_percpu_add(x, v) this_cpu_add(x, v) +#else +#define lockevent_percpu_inc(x) __this_cpu_inc(x) +#define lockevent_percpu_add(x, v) __this_cpu_add(x, v) +#endif + +/* * Increment the PV qspinlock statistical counters */ static inline void __lockevent_inc(enum lock_events event, bool cond) { if (cond) - __this_cpu_inc(lockevents[event]); + lockevent_percpu_inc(lockevents[event]); } #define lockevent_inc(ev) __lockevent_inc(LOCKEVENT_ ##ev, true) @@ -44,7 +82,7 @@ static inline void __lockevent_inc(enum lock_events event, bool cond) static inline void __lockevent_add(enum lock_events event, int inc) { - __this_cpu_add(lockevents[event], inc); + lockevent_percpu_add(lockevents[event], inc); } #define lockevent_add(ev, c) __lockevent_add(LOCKEVENT_ ##ev, c) diff --git a/kernel/locking/lockdep.c b/kernel/locking/lockdep.c index d06190fa5082..c47788fa85f9 100644 --- a/kernel/locking/lockdep.c +++ b/kernel/locking/lockdep.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * kernel/lockdep.c * diff --git a/kernel/locking/mutex.c b/kernel/locking/mutex.c index db578783dd36..0c601ae072b3 100644 --- a/kernel/locking/mutex.c +++ b/kernel/locking/mutex.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * kernel/locking/mutex.c * diff --git a/kernel/locking/percpu-rwsem.c b/kernel/locking/percpu-rwsem.c index f17dad99eec8..b6a9cc62099a 100644 --- a/kernel/locking/percpu-rwsem.c +++ b/kernel/locking/percpu-rwsem.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0-only #include <linux/atomic.h> #include <linux/rwsem.h> #include <linux/percpu.h> diff --git a/kernel/locking/rtmutex.c b/kernel/locking/rtmutex.c index 978d63a8261c..38fbf9fa7f1b 100644 --- a/kernel/locking/rtmutex.c +++ b/kernel/locking/rtmutex.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * RT-Mutexes: simple blocking mutual exclusion locks with PI support * diff --git a/kernel/locking/test-ww_mutex.c b/kernel/locking/test-ww_mutex.c index 65a3b7e55b9f..3e82f449b4ff 100644 --- a/kernel/locking/test-ww_mutex.c +++ b/kernel/locking/test-ww_mutex.c @@ -1,19 +1,6 @@ +// SPDX-License-Identifier: GPL-2.0-or-later /* * Module-based API test facility for ww_mutexes - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, you can access it online at - * http://www.gnu.org/licenses/gpl-2.0.html. */ #include <linux/kernel.h> diff --git a/kernel/module-internal.h b/kernel/module-internal.h index d354341f8cc0..33783abc377b 100644 --- a/kernel/module-internal.h +++ b/kernel/module-internal.h @@ -1,12 +1,8 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ /* Module internals * * Copyright (C) 2012 Red Hat, Inc. All Rights Reserved. * Written by David Howells (dhowells@redhat.com) - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public Licence - * as published by the Free Software Foundation; either version - * 2 of the Licence, or (at your option) any later version. */ #include <linux/elf.h> diff --git a/kernel/module_signing.c b/kernel/module_signing.c index 6b9a926fd86b..b10fb1986ca9 100644 --- a/kernel/module_signing.c +++ b/kernel/module_signing.c @@ -1,12 +1,8 @@ +// SPDX-License-Identifier: GPL-2.0-or-later /* Module signature checker * * Copyright (C) 2012 Red Hat, Inc. All Rights Reserved. * Written by David Howells (dhowells@redhat.com) - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public Licence - * as published by the Free Software Foundation; either version - * 2 of the Licence, or (at your option) any later version. */ #include <linux/kernel.h> diff --git a/kernel/notifier.c b/kernel/notifier.c index bfc95b3e4235..d9f5081d578d 100644 --- a/kernel/notifier.c +++ b/kernel/notifier.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0-only #include <linux/kdebug.h> #include <linux/kprobes.h> #include <linux/export.h> diff --git a/kernel/panic.c b/kernel/panic.c index b4543a31a495..4d9f55bf7d38 100644 --- a/kernel/panic.c +++ b/kernel/panic.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * linux/kernel/panic.c * diff --git a/kernel/pid.c b/kernel/pid.c index 89548d35eefb..e5cad0c7d5dd 100644 --- a/kernel/pid.c +++ b/kernel/pid.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * Generic pidhash and scalable, time-bounded PID allocator * diff --git a/kernel/pid_namespace.c b/kernel/pid_namespace.c index aa6e72fb7c08..f54bc7cb6c2d 100644 --- a/kernel/pid_namespace.c +++ b/kernel/pid_namespace.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * Pid namespaces * diff --git a/kernel/power/Kconfig b/kernel/power/Kconfig index 9bbaaab14b36..ff8592ddedee 100644 --- a/kernel/power/Kconfig +++ b/kernel/power/Kconfig @@ -1,3 +1,4 @@ +# SPDX-License-Identifier: GPL-2.0-only config SUSPEND bool "Suspend to RAM and standby" depends on ARCH_SUSPEND_POSSIBLE diff --git a/kernel/power/qos.c b/kernel/power/qos.c index 9d22131afc1e..33e3febaba53 100644 --- a/kernel/power/qos.c +++ b/kernel/power/qos.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * This module exposes the interface to kernel space for specifying * QoS dependencies. It provides infrastructure for registration of: diff --git a/kernel/printk/Makefile b/kernel/printk/Makefile index 4a2ffc39eb95..4d052fc6bcde 100644 --- a/kernel/printk/Makefile +++ b/kernel/printk/Makefile @@ -1,3 +1,4 @@ +# SPDX-License-Identifier: GPL-2.0-only obj-y = printk.o obj-$(CONFIG_PRINTK) += printk_safe.o obj-$(CONFIG_A11Y_BRAILLE_CONSOLE) += braille.o diff --git a/kernel/printk/internal.h b/kernel/printk/internal.h index 0f1898820cba..c8e6ab689d42 100644 --- a/kernel/printk/internal.h +++ b/kernel/printk/internal.h @@ -1,18 +1,6 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ /* * internal.h - printk internal definitions - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * as published by the Free Software Foundation; either version 2 - * of the License, or (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, see <http://www.gnu.org/licenses/>. */ #include <linux/percpu.h> diff --git a/kernel/printk/printk.c b/kernel/printk/printk.c index a6e06fe38e41..1888f6a3b694 100644 --- a/kernel/printk/printk.c +++ b/kernel/printk/printk.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * linux/kernel/printk.c * diff --git a/kernel/printk/printk_safe.c b/kernel/printk/printk_safe.c index 0913b4d385de..b4045e782743 100644 --- a/kernel/printk/printk_safe.c +++ b/kernel/printk/printk_safe.c @@ -1,18 +1,6 @@ +// SPDX-License-Identifier: GPL-2.0-or-later /* * printk_safe.c - Safe printk for printk-deadlock-prone contexts - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * as published by the Free Software Foundation; either version 2 - * of the License, or (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, see <http://www.gnu.org/licenses/>. */ #include <linux/preempt.h> diff --git a/kernel/profile.c b/kernel/profile.c index 9c08a2c7cb1d..af7c94bf5fa1 100644 --- a/kernel/profile.c +++ b/kernel/profile.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * linux/kernel/profile.c * Simple profiling. Manages a direct-mapped profile hit count buffer, diff --git a/kernel/ptrace.c b/kernel/ptrace.c index 6f357f4fc859..5710d07e67cf 100644 --- a/kernel/ptrace.c +++ b/kernel/ptrace.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * linux/kernel/ptrace.c * diff --git a/kernel/rcu/Kconfig b/kernel/rcu/Kconfig index 37301430970e..480edf328b51 100644 --- a/kernel/rcu/Kconfig +++ b/kernel/rcu/Kconfig @@ -1,3 +1,4 @@ +# SPDX-License-Identifier: GPL-2.0-only # # RCU-related configuration options # diff --git a/kernel/rcu/Kconfig.debug b/kernel/rcu/Kconfig.debug index 0ec7d1d33a14..5ec3ea4028e2 100644 --- a/kernel/rcu/Kconfig.debug +++ b/kernel/rcu/Kconfig.debug @@ -1,3 +1,4 @@ +# SPDX-License-Identifier: GPL-2.0-only # # RCU-related debugging configuration options # diff --git a/kernel/reboot.c b/kernel/reboot.c index b9e79e8c7226..c4d472b7f1b4 100644 --- a/kernel/reboot.c +++ b/kernel/reboot.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * linux/kernel/reboot.c * diff --git a/kernel/resource.c b/kernel/resource.c index 8c15f846e8ef..158f04ec1d4f 100644 --- a/kernel/resource.c +++ b/kernel/resource.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * linux/kernel/resource.c * diff --git a/kernel/sched/clock.c b/kernel/sched/clock.c index e3e3b979f9bd..1152259a4ca0 100644 --- a/kernel/sched/clock.c +++ b/kernel/sched/clock.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * sched_clock() for unstable CPU clocks * diff --git a/kernel/sched/core.c b/kernel/sched/core.c index 102dfcf0a29a..874c427742a9 100644 --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * kernel/sched/core.c * diff --git a/kernel/sched/cputime.c b/kernel/sched/cputime.c index ba4a143bdcf3..2305ce89a26c 100644 --- a/kernel/sched/cputime.c +++ b/kernel/sched/cputime.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * Simple CPU accounting cgroup controller */ diff --git a/kernel/sched/idle.c b/kernel/sched/idle.c index f5516bae0c1b..80940939b733 100644 --- a/kernel/sched/idle.c +++ b/kernel/sched/idle.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * Generic entry points for the idle threads and * implementation of the idle task scheduling class. diff --git a/kernel/sched/isolation.c b/kernel/sched/isolation.c index 687302051a27..123ea07a3f3b 100644 --- a/kernel/sched/isolation.c +++ b/kernel/sched/isolation.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * Housekeeping management. Manage the targets for routine code that can run on * any CPU: unbound workqueues, timers, kthreads and any offloadable work. diff --git a/kernel/sched/wait.c b/kernel/sched/wait.c index 6eb1f8efd221..fa0f9adfb752 100644 --- a/kernel/sched/wait.c +++ b/kernel/sched/wait.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * Generic waiting primitives. * diff --git a/kernel/sched/wait_bit.c b/kernel/sched/wait_bit.c index c67c6d24adc2..45eba18a2898 100644 --- a/kernel/sched/wait_bit.c +++ b/kernel/sched/wait_bit.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * The implementation of the wait_bit*() and related waiting APIs: */ diff --git a/kernel/signal.c b/kernel/signal.c index a1eb44dc9ff5..d7b9d14ac80d 100644 --- a/kernel/signal.c +++ b/kernel/signal.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * linux/kernel/signal.c * diff --git a/kernel/smp.c b/kernel/smp.c index f4cf1b0bb3b8..d155374632eb 100644 --- a/kernel/smp.c +++ b/kernel/smp.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * Generic helpers for smp ipi calls * diff --git a/kernel/smpboot.c b/kernel/smpboot.c index c230c2dd48e1..2efe1e206167 100644 --- a/kernel/smpboot.c +++ b/kernel/smpboot.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * Common SMP CPU bringup/teardown functions */ diff --git a/kernel/stacktrace.c b/kernel/stacktrace.c index 27bafc1e271e..5667f1da3ede 100644 --- a/kernel/stacktrace.c +++ b/kernel/stacktrace.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * kernel/stacktrace.c * diff --git a/kernel/stop_machine.c b/kernel/stop_machine.c index 7231fb5953fc..2b5a6754646f 100644 --- a/kernel/stop_machine.c +++ b/kernel/stop_machine.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0-or-later /* * kernel/stop_machine.c * @@ -5,8 +6,6 @@ * Copyright (C) 2008, 2005 Rusty Russell rusty@rustcorp.com.au * Copyright (C) 2010 SUSE Linux Products GmbH * Copyright (C) 2010 Tejun Heo <tj@kernel.org> - * - * This file is released under the GPLv2 and any later version. */ #include <linux/completion.h> #include <linux/cpu.h> diff --git a/kernel/sysctl.c b/kernel/sysctl.c index 943c89178e3d..7d1008be6173 100644 --- a/kernel/sysctl.c +++ b/kernel/sysctl.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * sysctl.c: General linux system control interface * diff --git a/kernel/test_kprobes.c b/kernel/test_kprobes.c index 7bca480151b0..76c997fdbc9d 100644 --- a/kernel/test_kprobes.c +++ b/kernel/test_kprobes.c @@ -1,17 +1,8 @@ +// SPDX-License-Identifier: GPL-2.0-or-later /* * test_kprobes.c - simple sanity test for *probes * * Copyright IBM Corp. 2008 - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it would be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See - * the GNU General Public License for more details. */ #define pr_fmt(fmt) "Kprobe smoke test: " fmt diff --git a/kernel/time/Kconfig b/kernel/time/Kconfig index e2c038d6c13c..fcc42353f125 100644 --- a/kernel/time/Kconfig +++ b/kernel/time/Kconfig @@ -1,3 +1,4 @@ +# SPDX-License-Identifier: GPL-2.0-only # # Timer subsystem related configuration options # diff --git a/kernel/trace/Kconfig b/kernel/trace/Kconfig index 5d965cef6c77..564e5fdb025f 100644 --- a/kernel/trace/Kconfig +++ b/kernel/trace/Kconfig @@ -1,3 +1,4 @@ +# SPDX-License-Identifier: GPL-2.0-only # # Architectures that offer an FUNCTION_TRACER implementation should # select HAVE_FUNCTION_TRACER: diff --git a/kernel/trace/bpf_trace.c b/kernel/trace/bpf_trace.c index b496ffdf5f36..f92d6ad5e080 100644 --- a/kernel/trace/bpf_trace.c +++ b/kernel/trace/bpf_trace.c @@ -1297,7 +1297,8 @@ int bpf_get_perf_event_info(const struct perf_event *event, u32 *prog_id, } #ifdef CONFIG_MODULES -int bpf_event_notify(struct notifier_block *nb, unsigned long op, void *module) +static int bpf_event_notify(struct notifier_block *nb, unsigned long op, + void *module) { struct bpf_trace_module *btm, *tmp; struct module *mod = module; @@ -1336,7 +1337,7 @@ static struct notifier_block bpf_module_nb = { .notifier_call = bpf_event_notify, }; -int __init bpf_event_init(void) +static int __init bpf_event_init(void) { register_module_notifier(&bpf_module_nb); return 0; diff --git a/kernel/umh.c b/kernel/umh.c index d937cbad903a..7f255b5a8845 100644 --- a/kernel/umh.c +++ b/kernel/umh.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * umh - the kernel usermode helper */ diff --git a/kernel/up.c b/kernel/up.c index ff536f9cc8a2..483c9962c999 100644 --- a/kernel/up.c +++ b/kernel/up.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * Uniprocessor-only support functions. The counterpart to kernel/smp.c */ diff --git a/kernel/user-return-notifier.c b/kernel/user-return-notifier.c index 9586b670a5b2..870ecd7c63ed 100644 --- a/kernel/user-return-notifier.c +++ b/kernel/user-return-notifier.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0-only #include <linux/user-return-notifier.h> #include <linux/percpu.h> diff --git a/kernel/user.c b/kernel/user.c index 88b834f0eebc..78b17e36e705 100644 --- a/kernel/user.c +++ b/kernel/user.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * The "user cache". * diff --git a/kernel/workqueue.c b/kernel/workqueue.c index 9657315405de..95aea04ff722 100644 --- a/kernel/workqueue.c +++ b/kernel/workqueue.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * kernel/workqueue.c - generic async execution with shared worker pool * |