Re: [PATCH 0/5] Remove onstack cpumask var usage

[Sam Ravnborg]

Hi Dawei,

On Thu, Apr 18, 2024 at 06:49:44PM +0800, Dawei Li wrote:
> Hi,
> 
> This series aims at removing on-stack cpumask var usage for sparc arch.
> 
> Generally it's preferable to avoid placing cpumasks on the stack, as
> for large values of NR_CPUS these can consume significant amounts of
> stack space and make stack overflows more likely.

Took a quick look at the patches, looks good except the one the bot
already complained about.
A quick grep shows a few more cases where we have an on-stack cpumask
in sparc code.

kernel/ds.c:    cpumask_t mask;
kernel/leon_kernel.c:   cpumask_t mask;
kernel/leon_smp.c:static void leon_cross_call(void *func, cpumask_t mask, unsigned long arg1,
kernel/sun4d_smp.c:static void sun4d_cross_call(void *func, cpumask_t mask, unsigned long arg1,

Do you plan to look at the other on-stack users too?
It would be nice to see them all gone in one patch-set.

	Sam