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| author | Paul Gortmaker <paul.gortmaker@windriver.com> | 2021-02-21 09:08:27 +0100 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@kernel.org> | 2021-03-08 23:16:58 +0100 |
| commit | 3e70df91f961b9df7ab3c0ae1934bdf15454c536 (patch) | |
| tree | 1a6379c4210ece30796e372df35e857b71cfa9ac /kernel/rcu | |
| parent | lib: test_bitmap: add tests for "N" alias (diff) | |
| download | linux-3e70df91f961b9df7ab3c0ae1934bdf15454c536.tar.xz linux-3e70df91f961b9df7ab3c0ae1934bdf15454c536.zip | |
rcu: deprecate "all" option to rcu_nocbs=
With the core bitmap support now accepting "N" as a placeholder for
the end of the bitmap, "all" can be represented as "0-N" and has the
advantage of not being specific to RCU (or any other subsystem).
So deprecate the use of "all" by removing documentation references
to it. The support itself needs to remain for now, since we don't
know how many people out there are using it currently, but since it
is in an __init area anyway, it isn't worth losing sleep over.
Cc: Yury Norov <yury.norov@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: "Paul E. McKenney" <paulmck@kernel.org>
Cc: Josh Triplett <josh@joshtriplett.org>
Acked-by: Yury Norov <yury.norov@gmail.com>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Diffstat (limited to 'kernel/rcu')
| -rw-r--r-- | kernel/rcu/tree_plugin.h | 6 |
1 files changed, 2 insertions, 4 deletions
diff --git a/kernel/rcu/tree_plugin.h b/kernel/rcu/tree_plugin.h index 2d603771c7dc..0b955627d609 100644 --- a/kernel/rcu/tree_plugin.h +++ b/kernel/rcu/tree_plugin.h @@ -1464,14 +1464,12 @@ static void rcu_cleanup_after_idle(void) /* * Parse the boot-time rcu_nocb_mask CPU list from the kernel parameters. - * The string after the "rcu_nocbs=" is either "all" for all CPUs, or a - * comma-separated list of CPUs and/or CPU ranges. If an invalid list is - * given, a warning is emitted and all CPUs are offloaded. + * If the list is invalid, a warning is emitted and all CPUs are offloaded. */ static int __init rcu_nocb_setup(char *str) { alloc_bootmem_cpumask_var(&rcu_nocb_mask); - if (!strcasecmp(str, "all")) + if (!strcasecmp(str, "all")) /* legacy: use "0-N" instead */ cpumask_setall(rcu_nocb_mask); else if (cpulist_parse(str, rcu_nocb_mask)) { |