Build error on s390:
arch/s390/kernel/entry.o: in function `sys_call_table_emu':
>> (.rodata+0x1288): undefined reference to `__s390_'
In commit ("All arch: remove system call sys_sysctl")
148 common fdatasync sys_fdatasync sys_fdatasync
-149 common _sysctl sys_sysctl compat_sys_sysctl
+149 common _sysctl sys_ni_syscall
150 common mlock sys_mlock sys_mlock
After the patch is integrated, there is a format error in the generated
arch/s390/include/generated/asm/syscall_table.h:
SYSCALL(sys_fdatasync, sys_fdatasync)
SYSCALL(sys_ni_syscall,) /* cause build error */
SYSCALL(sys_mlock,sys_mlock)
There are holes in the system call number in
arch/s390/kernel/syscalls/syscall.tbl. When generating syscall_table.h,
these hole numbers will be automatically filled with "NI_SYSCALL".
Therefore, delete the number 149 to fix the current compilation failure.
Similarly, modify tools/perf/arch/s390/entry/syscalls/syscall.tbl.
Fixes: ("All arch: remove system call sys_sysctl")
Fixes: https://lore.kernel.org/linuxppc-dev/[email protected]/
Reported-by: kernel test robot <[email protected]>
Signed-off-by: Xiaoming Ni <[email protected]>
---
arch/s390/kernel/syscalls/syscall.tbl | 1 -
tools/perf/arch/s390/entry/syscalls/syscall.tbl | 1 -
2 files changed, 2 deletions(-)
diff --git a/arch/s390/kernel/syscalls/syscall.tbl b/arch/s390/kernel/syscalls/syscall.tbl
index f17aaf6fe5de..bcaf93994e3c 100644
--- a/arch/s390/kernel/syscalls/syscall.tbl
+++ b/arch/s390/kernel/syscalls/syscall.tbl
@@ -138,7 +138,6 @@
146 common writev sys_writev compat_sys_writev
147 common getsid sys_getsid sys_getsid
148 common fdatasync sys_fdatasync sys_fdatasync
-149 common _sysctl sys_ni_syscall
150 common mlock sys_mlock sys_mlock
151 common munlock sys_munlock sys_munlock
152 common mlockall sys_mlockall sys_mlockall
diff --git a/tools/perf/arch/s390/entry/syscalls/syscall.tbl b/tools/perf/arch/s390/entry/syscalls/syscall.tbl
index 0193f9b98753..eb77d0d01d8f 100644
--- a/tools/perf/arch/s390/entry/syscalls/syscall.tbl
+++ b/tools/perf/arch/s390/entry/syscalls/syscall.tbl
@@ -138,7 +138,6 @@
146 common writev sys_writev compat_sys_writev
147 common getsid sys_getsid sys_getsid
148 common fdatasync sys_fdatasync sys_fdatasync
-149 common _sysctl sys_ni_syscall
150 common mlock sys_mlock compat_sys_mlock
151 common munlock sys_munlock compat_sys_munlock
152 common mlockall sys_mlockall sys_mlockall
--
2.27.0
On Thu, Jun 18, 2020 at 07:03:20PM +0800, Xiaoming Ni wrote:
> Build error on s390:
> arch/s390/kernel/entry.o: in function `sys_call_table_emu':
> >> (.rodata+0x1288): undefined reference to `__s390_'
>
> In commit ("All arch: remove system call sys_sysctl")
> 148 common fdatasync sys_fdatasync sys_fdatasync
> -149 common _sysctl sys_sysctl compat_sys_sysctl
> +149 common _sysctl sys_ni_syscall
> 150 common mlock sys_mlock sys_mlock
>
> After the patch is integrated, there is a format error in the generated
> arch/s390/include/generated/asm/syscall_table.h:
> SYSCALL(sys_fdatasync, sys_fdatasync)
> SYSCALL(sys_ni_syscall,) /* cause build error */
> SYSCALL(sys_mlock,sys_mlock)
>
> There are holes in the system call number in
> arch/s390/kernel/syscalls/syscall.tbl. When generating syscall_table.h,
> these hole numbers will be automatically filled with "NI_SYSCALL".
> Therefore, delete the number 149 to fix the current compilation failure.
> Similarly, modify tools/perf/arch/s390/entry/syscalls/syscall.tbl.
>
> Fixes: ("All arch: remove system call sys_sysctl")
> Fixes: https://lore.kernel.org/linuxppc-dev/[email protected]/
> Reported-by: kernel test robot <[email protected]>
> Signed-off-by: Xiaoming Ni <[email protected]>
> ---
> arch/s390/kernel/syscalls/syscall.tbl | 1 -
> tools/perf/arch/s390/entry/syscalls/syscall.tbl | 1 -
> 2 files changed, 2 deletions(-)
>
> diff --git a/arch/s390/kernel/syscalls/syscall.tbl b/arch/s390/kernel/syscalls/syscall.tbl
> index f17aaf6fe5de..bcaf93994e3c 100644
> --- a/arch/s390/kernel/syscalls/syscall.tbl
> +++ b/arch/s390/kernel/syscalls/syscall.tbl
> @@ -138,7 +138,6 @@
> 146 common writev sys_writev compat_sys_writev
> 147 common getsid sys_getsid sys_getsid
> 148 common fdatasync sys_fdatasync sys_fdatasync
> -149 common _sysctl sys_ni_syscall
This is not correct. It should be changed to:
149 common _sysctl - -
Otherwise the generated __NR__sysctl define will be lost from
unistd.h, which should not happen. Looking at the link above it
_looks_ like a similar mistake was done for arm64.
> diff --git a/tools/perf/arch/s390/entry/syscalls/syscall.tbl b/tools/perf/arch/s390/entry/syscalls/syscall.tbl
> index 0193f9b98753..eb77d0d01d8f 100644
> --- a/tools/perf/arch/s390/entry/syscalls/syscall.tbl
> +++ b/tools/perf/arch/s390/entry/syscalls/syscall.tbl
> @@ -138,7 +138,6 @@
> 146 common writev sys_writev compat_sys_writev
> 147 common getsid sys_getsid sys_getsid
> 148 common fdatasync sys_fdatasync sys_fdatasync
> -149 common _sysctl sys_ni_syscall
Same here.
On Thu, Jun 18, 2020 at 01:27:02PM +0200, Heiko Carstens wrote:
> On Thu, Jun 18, 2020 at 07:03:20PM +0800, Xiaoming Ni wrote:
> > Build error on s390:
> > arch/s390/kernel/entry.o: in function `sys_call_table_emu':
> > >> (.rodata+0x1288): undefined reference to `__s390_'
> >
> > In commit ("All arch: remove system call sys_sysctl")
> > 148 common fdatasync sys_fdatasync sys_fdatasync
> > -149 common _sysctl sys_sysctl compat_sys_sysctl
> > +149 common _sysctl sys_ni_syscall
> > 150 common mlock sys_mlock sys_mlock
> >
> > After the patch is integrated, there is a format error in the generated
> > arch/s390/include/generated/asm/syscall_table.h:
> > SYSCALL(sys_fdatasync, sys_fdatasync)
> > SYSCALL(sys_ni_syscall,) /* cause build error */
> > SYSCALL(sys_mlock,sys_mlock)
> >
> > There are holes in the system call number in
> > arch/s390/kernel/syscalls/syscall.tbl. When generating syscall_table.h,
> > these hole numbers will be automatically filled with "NI_SYSCALL".
> > Therefore, delete the number 149 to fix the current compilation failure.
> > Similarly, modify tools/perf/arch/s390/entry/syscalls/syscall.tbl.
> >
> > Fixes: ("All arch: remove system call sys_sysctl")
> > Fixes: https://lore.kernel.org/linuxppc-dev/[email protected]/
> > Reported-by: kernel test robot <[email protected]>
> > Signed-off-by: Xiaoming Ni <[email protected]>
> > ---
> > arch/s390/kernel/syscalls/syscall.tbl | 1 -
> > tools/perf/arch/s390/entry/syscalls/syscall.tbl | 1 -
> > 2 files changed, 2 deletions(-)
> >
> > diff --git a/arch/s390/kernel/syscalls/syscall.tbl b/arch/s390/kernel/syscalls/syscall.tbl
> > index f17aaf6fe5de..bcaf93994e3c 100644
> > --- a/arch/s390/kernel/syscalls/syscall.tbl
> > +++ b/arch/s390/kernel/syscalls/syscall.tbl
> > @@ -138,7 +138,6 @@
> > 146 common writev sys_writev compat_sys_writev
> > 147 common getsid sys_getsid sys_getsid
> > 148 common fdatasync sys_fdatasync sys_fdatasync
> > -149 common _sysctl sys_ni_syscall
>
> This is not correct. It should be changed to:
>
> 149 common _sysctl - -
>
> Otherwise the generated __NR__sysctl define will be lost from
> unistd.h, which should not happen. Looking at the link above it
> _looks_ like a similar mistake was done for arm64.
I think we're ok on arm64, since it's only the compat syscall table that
is being updated and we don't export compat uapi headers (rather, they
come from arch/arm/).
Will
On 2020/6/18 19:27, Heiko Carstens wrote:
> On Thu, Jun 18, 2020 at 07:03:20PM +0800, Xiaoming Ni wrote:
>> Build error on s390:
>> arch/s390/kernel/entry.o: in function `sys_call_table_emu':
>> >> (.rodata+0x1288): undefined reference to `__s390_'
>>
>> In commit ("All arch: remove system call sys_sysctl")
>> 148 common fdatasync sys_fdatasync sys_fdatasync
>> -149 common _sysctl sys_sysctl compat_sys_sysctl
>> +149 common _sysctl sys_ni_syscall
>> 150 common mlock sys_mlock sys_mlock
>>
>> After the patch is integrated, there is a format error in the generated
>> arch/s390/include/generated/asm/syscall_table.h:
>> SYSCALL(sys_fdatasync, sys_fdatasync)
>> SYSCALL(sys_ni_syscall,) /* cause build error */
>> SYSCALL(sys_mlock,sys_mlock)
>>
>> There are holes in the system call number in
>> arch/s390/kernel/syscalls/syscall.tbl. When generating syscall_table.h,
>> these hole numbers will be automatically filled with "NI_SYSCALL".
>> Therefore, delete the number 149 to fix the current compilation failure.
>> Similarly, modify tools/perf/arch/s390/entry/syscalls/syscall.tbl.
>>
>> Fixes: ("All arch: remove system call sys_sysctl")
>> Fixes: https://lore.kernel.org/linuxppc-dev/[email protected]/
>> Reported-by: kernel test robot <[email protected]>
>> Signed-off-by: Xiaoming Ni <[email protected]>
>> ---
>> arch/s390/kernel/syscalls/syscall.tbl | 1 -
>> tools/perf/arch/s390/entry/syscalls/syscall.tbl | 1 -
>> 2 files changed, 2 deletions(-)
>>
>> diff --git a/arch/s390/kernel/syscalls/syscall.tbl b/arch/s390/kernel/syscalls/syscall.tbl
>> index f17aaf6fe5de..bcaf93994e3c 100644
>> --- a/arch/s390/kernel/syscalls/syscall.tbl
>> +++ b/arch/s390/kernel/syscalls/syscall.tbl
>> @@ -138,7 +138,6 @@
>> 146 common writev sys_writev compat_sys_writev
>> 147 common getsid sys_getsid sys_getsid
>> 148 common fdatasync sys_fdatasync sys_fdatasync
>> -149 common _sysctl sys_ni_syscall
>
> This is not correct. It should be changed to:
>
> 149 common _sysctl - -
>
thanks for your guidance
> Otherwise the generated __NR__sysctl define will be lost from
> unistd.h, which should not happen. Looking at the link above it
> _looks_ like a similar mistake was done for arm64.
>
Using holes will cause the definition of __NR__sysctl to be missing in
include/asm/unistd_32.h and include/asm/unistd_64.h
For arm64, I observed that "sys_afs_syscall", "sys_get_kernel_syms" and
other commented out syscalls have no corresponding definition _NR_XXX in
unistd.h, is it not a problem on arm64?
/* 127 was sys_create_module */
__SYSCALL(127, sys_ni_syscall)
/* 130 was sys_get_kernel_syms */
__SYSCALL(130, sys_ni_syscall)
/* 137 was sys_afs_syscall */
__SYSCALL(137, sys_ni_syscall)
Thanks
Xiaoming Ni