On Mon, Jan 18, 2016 at 06:22:21PM -0800, Florian Fainelli wrote: > Le 17/01/2016 06:48, Heinrich Schuchardt a écrit : > > On 01/17/2016 02:54 PM, Heinrich Schuchardt wrote: > >> > >> HEAD is now at afd2ff9... Linux 4.4 > >> arch/mips/kernel/signal.c: In function ‘sc_to_extcontext’: > >> arch/mips/kernel/signal.c:142:12: error: ‘struct ucontext’ has no member > >> named ‘uc_extcontext’ > >> return &uc->uc_extcontext; > >> ^ > >> In file included from include/linux/poll.h:11:0, > >> from include/linux/ring_buffer.h:7, > >> from include/linux/trace_events.h:5, > >> from include/trace/syscall.h:6, > >> from include/linux/syscalls.h:81, > >> from arch/mips/kernel/signal.c:26: > >> arch/mips/kernel/signal.c: In function ‘save_msa_extcontext’: > >> arch/mips/kernel/signal.c:170:40: error: dereferencing pointer to > >> incomplete type > >> > > > > The problem stemmed from make not recognizing that this file was outdated: > > > > Oct 16 2014 arch/mips/include/generated/asm/ucontext.h > > > > Shouldn't make automatically regenerate outdated files? > > The reduced test case can be simplified to these steps: > > git co f1fe2d21f4e1aca8644cea888dc618f0183ad671\^1 > configure your kernel > ARCH=mips make arch/mips/kernel/signal.o > git co f1fe2d21f4e1aca8644cea888dc618f0183ad671 > ARCH=mips make arch/mips/kernel/signal.o > > The problem seems to be that if there was a previous build which > resulted in creating an asm-generic wrapper for a file > (arch/mips/include/generated/asm/ucontext.h in that case), but this file > was later moved into an arch-specific, non asm-generic header file, then > we are just not going to automatically remove this auto-generated > wrapper, and generate the new one. > > This seems to be aggravated by the fact that commit > f1fe2d21f4e1aca8644cea888dc618f0183ad671 does not add ucontext.h to > arch/mips/include/uapi/Kbuild, Paul, James is that intentional? > > After trying to mess a bit with a clean solution, I just gave up and > decided that this was not worth fixing since it is a very infrequent > problem. We lately had about five people reporting similar issues that all could be resolved with make distclean. Ralf
