Merge 6.12

[tavip]

Merge 6.12 with incremental merges for each Linux version:

45d64ae7278e lkl: fix a few [-Wmissing-prototypes] warnings
e1a8c4696f51 Merge tag 'v6.12' into lkl-6.12
6680c3ed3945 lkl: syscalls: add struct clone_args
fa8aacd8fd76 lkl: fix asm-generic wrappers
1225b215c819 Merge tag 'v6.11' into lkl-6.11
34b50de491aa lkl: add page-nommu.h
3626bbb272cb Merge tag 'v6.10' into lkl-6.10
3be4106a1e75 lkl: add __BITS_PER_LONG_LONG
aea8856f0b91 Merge tag 'v6.9' into lkl-6.9
d1184e5f466a Revert "arch: remove ARCH_THREAD_STACK_ALLOCATOR"
c1d5f092071e Merge tag 'v6.8' into lkl-6.7