linux/arch
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
..
alpha Merge branch 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2022-04-01 19:57:03 -07:00
arc ptrace: Cleanups for v5.18 2022-03-28 17:29:53 -07:00
arm ARM fixes for 5.18-rc1: 2022-04-03 10:17:48 -07:00
arm64 SoC: fixes for 5.18, part 1 2022-04-01 13:21:19 -07:00
csky ptrace: Cleanups for v5.18 2022-03-28 17:29:53 -07:00
h8300 Merge branch 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2022-04-01 19:57:03 -07:00
hexagon ptrace: Cleanups for v5.18 2022-03-28 17:29:53 -07:00
ia64 Merge branch 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2022-04-01 19:57:03 -07:00
m68k Merge branch 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2022-04-01 19:57:03 -07:00
microblaze Kbuild updates for v5.18 2022-03-31 11:59:03 -07:00
mips - build fix for gpio 2022-04-02 12:14:38 -07:00
nios2 ptrace: Cleanups for v5.18 2022-03-28 17:29:53 -07:00
openrisc ptrace: Cleanups for v5.18 2022-03-28 17:29:53 -07:00
parisc Kbuild updates for v5.18 2022-03-31 11:59:03 -07:00
powerpc Merge branch 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2022-04-01 19:57:03 -07:00
riscv RISC-V Patches for the 5.18 Merge Window, Part 2 2022-04-01 13:31:57 -07:00
s390 * Only do MSR filtering for MSRs accessed by rdmsr/wrmsr 2022-04-02 12:09:02 -07:00
sh Merge branch 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2022-04-01 19:57:03 -07:00
sparc Kbuild updates for v5.18 2022-03-31 11:59:03 -07:00
um Kbuild fixes for v5.18 2022-04-02 12:33:31 -07:00
x86 A set of x86 fixes and updates: 2022-04-03 12:15:47 -07:00
xtensa Kbuild updates for v5.18 2022-03-31 11:59:03 -07:00
.gitignore
Kconfig rcu: Make the TASKS_RCU Kconfig option be selected 2022-04-20 16:52:58 -07:00