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rcu/tree_plugin: Don't handle the case of 'all' CPU range 

The 'all' semantics is now supported by the bitmap_parselist() so we can
drop supporting it as a special case in RCU code.  Since 'all' is properly
supported in core bitmap code, also drop legacy comment in RCU for it.

This patch does not make any functional changes for existing users.

Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Yury Norov <yury.norov@gmail.com>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
This commit is contained in:
Yury Norov 2021-04-20 20:13:26 -07:00 committed by Paul E. McKenney
parent b18def121f
commit a6814a79f2
1 changed files with 3 additions and 6 deletions
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9
kernel/rcu/tree_plugin.h
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@ -1535,13 +1535,10 @@ static void rcu_cleanup_after_idle(void)
static int __init rcu_nocb_setup(char *str)
{
alloc_bootmem_cpumask_var(&rcu_nocb_mask);
if (!strcasecmp(str, "all")) /* legacy: use "0-N" instead */
if (cpulist_parse(str, rcu_nocb_mask)) {
pr_warn("rcu_nocbs= bad CPU range, all CPUs set\n");
cpumask_setall(rcu_nocb_mask);
else
if (cpulist_parse(str, rcu_nocb_mask)) {
pr_warn("rcu_nocbs= bad CPU range, all CPUs set\n");
cpumask_setall(rcu_nocb_mask);
}
}
return 1;
}
__setup("rcu_nocbs=", rcu_nocb_setup);