On 8/13/22 10:03, Conor.Dooley@xxxxxxxxxxxxx wrote:
> On 07/08/2022 23:09, Randy Dunlap wrote:
>> When CONFIG_ADVISE_SYSCALLS is not set/enabled and CONFIG_COMPAT is
>> set/enabled, the riscv compat_syscall_table references
>> 'compat_sys_fadvise64_64', which is not defined:
>>
>> riscv64-linux-ld: arch/riscv/kernel/compat_syscall_table.o:(.rodata+0x6f8):
>> undefined reference to `compat_sys_fadvise64_64'
>>
>> Add 'fadvise64_64' to kernel/sys_ni.c as a conditional COMPAT function
>> so that when CONFIG_ADVISE_SYSCALLS is not set, there is a fallback
>> function available.
>
> Is this in a 6.0 destined tree somewhere that I've missed?
> Bumped into it while looking at an unrelated LKP randconfig error.
> FWIW:
> Tested-by: Conor Dooley <conor.dooley@xxxxxxxxxxxxx>
> Thanks,
> Conor.
It's in Andrew's mm-hotfixes-unstable branch AFAIK.
Thanks.
>>
>> Fixes: d3ac21cacc24 ("mm: Support compiling out madvise and fadvise")
>> Signed-off-by: Randy Dunlap <rdunlap@xxxxxxxxxxxxx>
>> Suggested-by: Arnd Bergmann <arnd@xxxxxxxx>
>> Cc: Josh Triplett <josh@xxxxxxxxxxxxxxxx>
>> Cc: Paul Walmsley <paul.walmsley@xxxxxxxxxx>
>> Cc: Palmer Dabbelt <palmer@xxxxxxxxxxx>
>> Cc: Albert Ou <aou@xxxxxxxxxxxxxxxxx>
>> Cc: linux-riscv@xxxxxxxxxxxxxxxxxxx
>> Cc: Arnd Bergmann <arnd@xxxxxxxx>
>> Cc: linux-api@xxxxxxxxxxxxxxx
>> Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
>> Cc: linux-mm@xxxxxxxxx
>> ---
>> v2: patch kernel/sys_ni.c (for any arch) instead of arch/riscv's
>> unistd.h (Arnd)
>>
>> kernel/sys_ni.c | 1 +
>> 1 file changed, 1 insertion(+)
>>
>> --- a/kernel/sys_ni.c
>> +++ b/kernel/sys_ni.c
>> @@ -277,6 +277,7 @@ COND_SYSCALL(landlock_restrict_self);
>>
>> /* mm/fadvise.c */
>> COND_SYSCALL(fadvise64_64);
>> +COND_SYSCALL_COMPAT(fadvise64_64);
>>
>> /* mm/, CONFIG_MMU only */
>> COND_SYSCALL(swapon);
>>
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--
~Randy
