diff options
| author | Paul E. McKenney <paulmck@kernel.org> | 2022-11-22 13:53:57 -0800 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@kernel.org> | 2022-11-29 15:00:06 -0800 |
| commit | 0cd7e350abc40eed5d3b60292dc102f700c88388 (patch) | |
| tree | f5777dc4fe1aed4fbbd1a38ba56b36d5af17dcfb /kernel/rcu/Kconfig | |
| parent | f733615e39aa2d6ddeef33b7b2c9aa6a5a2c2785 (diff) | |
rcu: Make SRCU mandatory
Kernels configured with CONFIG_PRINTK=n and CONFIG_SRCU=n get build
failures. This causes trouble for deep embedded systems. But given
that there are more than 25 instances of "select SRCU" in the kernel,
it is hard to believe that there are many kernels running in production
without SRCU. This commit therefore makes SRCU mandatory. The SRCU
Kconfig option remains for backwards compatibility, and will be removed
when it is no longer used.
[ paulmck: Update per kernel test robot feedback. ]
Reported-by: John Ogness <john.ogness@linutronix.de>
Reported-by: Petr Mladek <pmladek@suse.com>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Cc: <linux-arch@vger.kernel.org>
Acked-by: Randy Dunlap <rdunlap@infradead.org> # build-tested
Reviewed-by: John Ogness <john.ogness@linutronix.de>
Diffstat (limited to 'kernel/rcu/Kconfig')
| -rw-r--r-- | kernel/rcu/Kconfig | 11 |
1 files changed, 3 insertions, 8 deletions
diff --git a/kernel/rcu/Kconfig b/kernel/rcu/Kconfig index f53ad63b2bc6..1b0d79b2f5fa 100644 --- a/kernel/rcu/Kconfig +++ b/kernel/rcu/Kconfig @@ -54,21 +54,17 @@ config RCU_EXPERT Say N if you are unsure. config SRCU - bool - help - This option selects the sleepable version of RCU. This version - permits arbitrary sleeping or blocking within RCU read-side critical - sections. + def_bool y config TINY_SRCU bool - default y if SRCU && TINY_RCU + default y if TINY_RCU help This option selects the single-CPU non-preemptible version of SRCU. config TREE_SRCU bool - default y if SRCU && !TINY_RCU + default y if !TINY_RCU help This option selects the full-fledged version of SRCU. @@ -77,7 +73,6 @@ config NEED_SRCU_NMI_SAFE config TASKS_RCU_GENERIC def_bool TASKS_RCU || TASKS_RUDE_RCU || TASKS_TRACE_RCU - select SRCU help This option enables generic infrastructure code supporting task-based RCU implementations. Not for manual selection. |