Arnaldo, On Tue, May 21, 2019 at 03:03:54PM -0300, Arnaldo Carvalho de Melo wrote: > Em Tue, May 21, 2019 at 12:19:18PM -0300, Arnaldo Carvalho de Melo escreveu: > > Em Tue, May 21, 2019 at 04:34:47PM +0200, Michael Petlan escreveu: > > > On Tue, 21 May 2019, Arnaldo Carvalho de Melo wrote: > > > > Em Tue, May 21, 2019 at 06:02:03AM +0300, Vitaly Chikunov escreveu: > > > > > When a host system has kernel headers that are newer than a compiling > > > > > kernel, mksyscalltbl fails with errors such as: > > > > > > <stdin>: In function 'main': > > > > > <stdin>:271:44: error: '__NR_kexec_file_load' undeclared (first use > > > > > in this function) > > > > > <stdin>:271:44: note: each undeclared identifier is reported only > > > > > once for each function it appears in > > > > > <stdin>:272:46: error: '__NR_pidfd_send_signal' undeclared (first > > > > > use in this function) > > > > > <stdin>:273:43: error: '__NR_io_uring_setup' undeclared (first use > > > > > in this function) > > > > > <stdin>:274:43: error: '__NR_io_uring_enter' undeclared (first use > > > > > in this function) > > > > > <stdin>:275:46: error: '__NR_io_uring_register' undeclared (first > > > > > use in this function) > > > > > tools/perf/arch/arm64/entry/syscalls//mksyscalltbl: line 48: > > > > > /tmp/create-table-xvUQdD: Permission denied > > > > > > mksyscalltbl is compiled with default host includes, but run with > > > > > It shouldn't :-\ So with this you're making it use the ones shipped in > > > > tools/include? Good, I'll test it, thanks! > > > > I've hit the issue too, this patch fixes it for me. > > > Tested. > > > Thanks, I'll add your Tested-by, appreciated. > > Was this in a cross-build environment? Native?
It was native build on aarch64 with both 'hostcc' and 'gcc' arguments of mksyscalltbl being set to gcc. > I'm asking because I test > this on several cross build environments, like on ubuntu 19.04 cross > building to aarch64: > ... > I.e. it didn't fail the build, but in the end these new syscalls are not > there, while with your patch, they are: Probably in your case system headers was older than kernel you are building so you just silently losing syscalls. > Thanks, applied. Thanks! > > - Arnaldo
