Hi,
On Sun, Nov 28, 2021 at 10:46:13AM +0100, Salvatore Bonaccorso wrote:
Hi,
On Wed, Nov 24, 2021 at 12:54:38PM +0100, Greg Kroah-Hartman wrote:
From: Peter Zijlstra peterz@infradead.org
[ Upstream commit ce0b9c805dd66d5e49fd53ec5415ae398f4c56e6 ]
vmlinux.o: warning: objtool: look_up_lock_class()+0xc7: call to rcu_read_lock_any_held() leaves .noinstr.text section
For 4.19.218 at least this commit seems to cause a build failure for cpupower, if warnings are treated as errors, I have not seen the same for the 5.10.80 build:
gcc -g -O2 -fstack-protector-strong -Wformat -Werror=format-security -DVERSION="4.19" -DPACKAGE="cpupower" -DPACKAGE_BUGREPORT="Debian\ (reportbug\ linux-cpupower)" -D_GNU_SOURCE -pipe -DNLS -Wall -Wchar-subscripts -Wpointer-arith -Wsign-compare -Wno-pointer-sign -Wdeclaration-after-statement -Wshadow -Os -fomit-frame-pointer -fPIC -o /home/build/linux-4.19.218/debian/build/build-tools/tools/power/cpupower/lib/cpupower.o -c lib/cpupower.c In file included from lockdep.c:28: ../../../kernel/locking/lockdep.c: In function ‘look_up_lock_class’: ../../../kernel/locking/lockdep.c:694:2: error: implicit declaration of function ‘hlist_for_each_entry_rcu_notrace’; did you mean ‘hlist_for_each_entry_continue’? [-Werror=implicit-function-declaration] hlist_for_each_entry_rcu_notrace(class, hash_head, hash_entry) { ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ hlist_for_each_entry_continue ../../../kernel/locking/lockdep.c:694:53: error: ‘hash_entry’ undeclared (first use in this function); did you mean ‘hash_ptr’? hlist_for_each_entry_rcu_notrace(class, hash_head, hash_entry) { ^~~~~~~~~~ hash_ptr ../../../kernel/locking/lockdep.c:694:53: note: each undeclared identifier is reported only once for each function it appears in ../../../kernel/locking/lockdep.c:694:64: error: expected ‘;’ before ‘{’ token hlist_for_each_entry_rcu_notrace(class, hash_head, hash_entry) { ^~ ; ../../../kernel/locking/lockdep.c:706:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ cc1: some warnings being treated as errors make[5]: *** [/home/build/linux-4.19.218/tools/build/Makefile.build:97: /home/build/linux-4.19.218/debian/build/build-tools/tools/lib/lockdep/lockdep.o] Error 1 make[4]: *** [Makefile:121: /home/build/linux-4.19.218/debian/build/build-tools/tools/lib/lockdep/liblockdep-in.o] Error 2 make[4]: Leaving directory '/home/build/linux-4.19.218/tools/lib/lockdep' make[3]: *** [/home/build/linux-4.19.218/debian/rules.d/tools/lib/lockdep/Makefile:16: all] Error 2 make[3]: Leaving directory '/home/build/linux-4.19.218/debian/build/build-tools/tools/lib/lockdep' make[2]: *** [debian/rules.real:795: build-liblockdep] Error 2 make[2]: *** Waiting for unfinished jobs....
I was not yet able to look further on it.
Might actually be a distro specific issue, needs some further investigation.
Regards, Salvatore