On 17/07/2020 15:21, Sebastian Andrzej Siewior wrote:
> On 2020-07-17 14:33:31 [+0200], Alberto Milone wrote:
>> I checked and CONFIG_DEBUG_LOCK_ALLOC is not enabled in our kernels.
> The access to that variable is optimized away if not for debug. I made
> this:
> | #include <linux/module.h>
> | #include <linux/idr.h>
> |
> | static int le_init(void)
> | {
> | idr_preload_end();
> | return 0;
> | }
> | module_init(le_init);
> |
> | static void le_exit(void)
> | {
> | }
> | module_exit(le_exit);
> |
> | MODULE_DESCRIPTION("driver");
> | MODULE_LICENSE("prop");
>
> and it produced a .ko. Here the "idr_preload_end()" was reduced to
> "preempt_enable()" as intended. No access to
> "&radix_tree_preloads.lock".
>
> Sebastian
* Subscribing Seth
