Hi Kari, On 3/22/22 00:59, Kari Argillander wrote: > 15.3.2022 12.35 Ingo Molnar (mingo@xxxxxxxxxx) wrote: >> >> This is -v3 of the "Fast Kernel Headers" tree, which is an ongoing rework >> of the Linux kernel's header hierarchy & header dependencies, with the dual >> goals of: >> >> - speeding up the kernel build (both absolute and incremental build times) >> >> - decoupling subsystem type & API definitions from each other >> >> The fast-headers tree consists of over 25 sub-trees internally, spanning >> over 2,300 commits, which can be found at: >> >> git://git.kernel.org/pub/scm/linux/kernel/git/mingo/tip.git master > > I have had problems to build master branch (defconfig) with gcc9 > gcc (Ubuntu 9.4.0-1ubuntu1~20.04) 9.4.0 > > I did also test v2 and problems where there too. I have no problem with gcc10 or > Clang11. Error I get is: > > In file included from ./include/linux/rcuwait_api.h:7, > from ./include/linux/rcuwait.h:6, > from ./include/linux/irq_work.h:7, > from ./include/linux/perf_event_types.h:44, > from ./include/linux/perf_event_api.h:17, > from arch/x86/kernel/kprobes/opt.c:8: > ./include/linux/rcuwait_api.h: In function ‘rcuwait_active’: > ./include/linux/rcupdate.h:328:9: error: dereferencing pointer to > incomplete type ‘struct task_struct’ > 328 | typeof(*p) *local = (typeof(*p) *__force)READ_ONCE(p); \ > | ^ > ./include/linux/rcupdate.h:439:31: note: in expansion of macro > ‘__rcu_access_pointer’ > 439 | #define rcu_access_pointer(p) __rcu_access_pointer((p), > __UNIQUE_ID(rcu), __rcu) > | ^~~~~~~~~~~~~~~~~~~~ > ./include/linux/rcuwait_api.h:15:11: note: in expansion of macro > ‘rcu_access_pointer’ > 15 | return !!rcu_access_pointer(w->task); > > Argillander You could try the patch here: https://lore.kernel.org/all/917e9ce0-c8cf-61b2-d1ba-ebf25bbd979d@xxxxxxxxxxxxx/ although the build error that it fixes doesn't look exactly the same as yours. >> There's various changes in -v3, and it's now ported to the latest kernel >> (v5.17-rc8). >> >> Diffstat difference: >> >> -v2: 25332 files changed, 178498 insertions(+), 74790 deletions(-) >> -v3: 25513 files changed, 180947 insertions(+), 74572 deletions(-) -- ~Randy
