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
