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Paul E. McKenney 835f14ed53 rcu: Make the TASKS_RCU Kconfig option be selected 
Currently, any kernel built with CONFIG_PREEMPTION=y also gets
CONFIG_TASKS_RCU=y, which is not helpful to people trying to build
preemptible kernels of minimal size.

Because CONFIG_TASKS_RCU=y is needed only in kernels doing tracing of
one form or another, this commit moves from TASKS_RCU deciding when it
should be enabled to the tracing Kconfig options explicitly selecting it.
This allows building preemptible kernels without TASKS_RCU, if desired.

This commit also updates the SRCU-N and TREE09 rcutorture scenarios
in order to avoid Kconfig errors that would otherwise result from
CONFIG_TASKS_RCU being selected without its CONFIG_RCU_EXPERT dependency
being met.

[ paulmck: Apply BPF_SYSCALL feedback from Andrii Nakryiko. ]

Reported-by: Hyeonggon Yoo <42.hyeyoo@gmail.com>
Tested-by: Hyeonggon Yoo <42.hyeyoo@gmail.com>
Tested-by: Zhouyi Zhou <zhouzhouyi@gmail.com>
Cc: Andrii Nakryiko <andrii@kernel.org>
Cc: Alexei Starovoitov <ast@kernel.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Acked-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
2022-04-20 16:52:58 -07:00
..
preload
bpf: Remove redundant slash
2022-03-07 22:19:32 -08:00
arraymap.c
bpf: generalise tail call map compatibility check
2022-01-21 14:14:03 -08:00
bloom_filter.c
bpf: Add missing map_get_next_key method to bloom filter map.
2021-12-29 09:38:31 -08:00
bpf_inode_storage.c
bpf: Enable non-atomic allocations in local storage
2022-03-20 18:55:05 -07:00
bpf_iter.c
bpf: Add support for bpf iterator programs to use sleepable helpers
2022-01-24 19:55:40 -08:00
bpf_local_storage.c
bpf: Enable non-atomic allocations in local storage
2022-03-20 18:55:05 -07:00
bpf_lru_list.c
bpf_lru_list: Read double-checked variable once without lock
2021-02-10 15:54:26 -08:00
bpf_lru_list.h
bpf: Fix a typo "inacitve" -> "inactive"
2020-04-06 21:54:10 +02:00
bpf_lsm.c
bpf-lsm: Make bpf_lsm_kernel_read_file() as sleepable
2022-03-10 18:57:55 -08:00
bpf_struct_ops_types.h
bpf: Add dummy BPF STRUCT_OPS for test purpose
2021-11-01 14:10:00 -07:00
bpf_struct_ops.c
bpf: Rename btf_member accessors.
2021-12-02 11:18:34 -08:00
bpf_task_storage.c
bpf: Enable non-atomic allocations in local storage
2022-03-20 18:55:05 -07:00
btf.c
bpf: Fix maximum permitted number of arguments check
2022-03-28 19:08:17 -07:00
cgroup.c
bpf: Cleanup comments
2022-02-23 15:17:51 -08:00
core.c
bpf: Fix bpf_prog_pack when PMU_SIZE is not defined
2022-03-21 13:53:45 -07:00
cpumap.c
bpf: generalise tail call map compatibility check
2022-01-21 14:14:03 -08:00
devmap.c
bpf: generalise tail call map compatibility check
2022-01-21 14:14:03 -08:00
disasm.c
bpf: Relicense disassembler as GPL-2.0-only OR BSD-2-Clause
2021-09-02 14:49:23 +02:00
disasm.h
bpf: Relicense disassembler as GPL-2.0-only OR BSD-2-Clause
2021-09-02 14:49:23 +02:00
dispatcher.c
bpf: Remove bpf_image tree
2020-03-13 12:49:52 -07:00
hashtab.c
bpf: Cleanup comments
2022-02-23 15:17:51 -08:00
helpers.c
bpf: Replace strncpy() with strscpy()
2022-03-07 22:04:33 -08:00
inode.c
bpf: Convert bpf_preload.ko to use light skeleton.
2022-02-10 23:31:51 +01:00
Kconfig
rcu: Make the TASKS_RCU Kconfig option be selected
2022-04-20 16:52:58 -07:00
local_storage.c
bpf: Cleanup comments
2022-02-23 15:17:51 -08:00
lpm_trie.c
bpf: Fix typo in a comment in bpf lpm_trie.
2021-12-30 18:42:34 -08:00
Makefile
bpf: Prepare relo_core.c for kernel duty.
2021-12-02 11:18:34 -08:00
map_in_map.c
bpf: Remember BTF of inner maps.
2021-07-15 22:31:10 +02:00
map_in_map.h
bpf: Add map_meta_equal map ops
2020-08-28 15:41:30 +02:00
map_iter.c
bpf: Introduce MEM_RDONLY flag
2021-12-18 13:27:41 -08:00
mmap_unlock_work.h
bpf: Introduce helper bpf_find_vma
2021-11-07 11:54:51 -08:00
net_namespace.c
net: Add includes masked by netdevice.h including uapi/bpf.h
2021-12-29 20:03:05 -08:00
offload.c
bpf, offload: Replace bitwise AND by logical AND in bpf_prog_offload_info_fill
2020-02-17 16:53:49 +01:00
percpu_freelist.c
bpf: Use raw_spin_trylock() for pcpu_freelist_push/pop in NMI
2020-10-06 00:04:11 +02:00
percpu_freelist.h
bpf: Use raw_spin_trylock() for pcpu_freelist_push/pop in NMI
2020-10-06 00:04:11 +02:00
prog_iter.c
bpf: Refactor bpf_iter_reg to have separate seq_info member
2020-07-25 20:16:32 -07:00
queue_stack_maps.c
bpf: Eliminate rlimit-based memory accounting for queue_stack_maps maps
2020-12-02 18:32:46 -08:00
reuseport_array.c
bpf: Cleanup comments
2022-02-23 15:17:51 -08:00
ringbuf.c
bpf: Use VM_MAP instead of VM_ALLOC for ringbuf
2022-02-02 23:15:24 -08:00
stackmap.c
bpf: Adjust BPF stack helper functions to accommodate skip > 0
2022-03-20 19:16:23 -07:00
syscall.c
bpf: Add cookie support to programs attached with kprobe multi link
2022-03-17 20:17:19 -07:00
sysfs_btf.c
bpf: Load and verify kernel module BTFs
2020-11-10 15:25:53 -08:00
task_iter.c
bpf: Introduce btf_tracing_ids
2021-11-12 10:19:09 -08:00
tnum.c
bpf, tnums: Provably sound, faster, and more precise algorithm for tnum_mul
2021-06-01 13:34:15 +02:00
trampoline.c
Add support for Intel CET-IBT, available since Tigerlake (11th gen), which is a
2022-03-27 10:17:23 -07:00
verifier.c
bpf: Fix warning for cast from restricted gfp_t in verifier
2022-03-21 13:29:16 -07:00