On Wed, Dec 10, 2014 at 10:52:51AM -0500, Tejun Heo wrote:
> Convert the existing user of cpu{mask|list}_scnprintf() and
> node{mask|list}_scnprintf() which use them just to printk or
> seq_printf() the resulting buffer to use the following functions
> instead respectively.
>
> * For printk: cpu{mask|list}_pr_cont() and node{mask|list}_pr_cont().
>
> * For seq_file: seq_cpumask[_list]() and seq_nodemask[_list]().
>
> Because these conversions usually break up a single output function
> call into multiple, the reduction is LOC isn't too big but it removes
> unnecessary complexity and/or arbitrary limit on the length printed.
>
> This patch is dependent on the previous patch ("bitmap, cpumask,
> nodemask: implement pr_cont variants of formatting functions") which
> is planned to go through -mm. It'd be the easiest to route this
> together. If this should go through the subsystem tree, please wait
> till the forementioned patch is merged to mainline.
It should be OK to send this via your tree.
> Signed-off-by: Tejun Heo <t...@kernel.org>
> Cc: Andrew Morton <a...@linux-foundation.org>
> Cc: "Paul E. McKenney" <paul...@linux.vnet.ibm.com>
Acked-by: Paul E. McKenney <paul...@linux.vnet.ibm.com>
> ---
> kernel/rcu/tree_plugin.h | 6 +++---
> 1 file changed, 3 insertions(+), 3 deletions(-)
>
> diff --git a/kernel/rcu/tree_plugin.h b/kernel/rcu/tree_plugin.h
> index 7a72858..a788a6f 100644
> --- a/kernel/rcu/tree_plugin.h
> +++ b/kernel/rcu/tree_plugin.h
> @@ -53,7 +53,6 @@ DEFINE_PER_CPU(char, rcu_cpu_has_work);
> static cpumask_var_t rcu_nocb_mask; /* CPUs to have callbacks offloaded. */
> static bool have_rcu_nocb_mask; /* Was rcu_nocb_mask allocated? */
> static bool __read_mostly rcu_nocb_poll; /* Offload kthread are to poll.
> */
> -static char __initdata nocb_buf[NR_CPUS * 5];
> #endif /* #ifdef CONFIG_RCU_NOCB_CPU */
>
> /*
> @@ -2377,8 +2376,9 @@ void __init rcu_init_nohz(void)
> cpumask_and(rcu_nocb_mask, cpu_possible_mask,
> rcu_nocb_mask);
> }
> - cpulist_scnprintf(nocb_buf, sizeof(nocb_buf), rcu_nocb_mask);
> - pr_info("\tOffload RCU callbacks from CPUs: %s.\n", nocb_buf);
> + pr_info("\tOffload RCU callbacks from CPUs: ");
> + cpulist_pr_cont(rcu_nocb_mask);
> + pr_cont(".\n");
> if (rcu_nocb_poll)
> pr_info("\tPoll for callbacks from no-CBs CPUs.\n");
>
> --
> 2.1.0
>
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