[PATCH 5/6] audit: Declare ppc32_classify_syscall()

[Christophe Leroy]

Le 19/08/2021 à 16:56, Christophe Leroy a écrit :
> 
> 
> Le 19/08/2021 à 14:56, Cédric Le Goater a écrit :
>> This fixes a compile error with W=1.
>>
>> Cc: Christophe Leroy <christophe.leroy at c-s.fr>
>> Signed-off-by: Cédric Le Goater <clg at kaod.org>
>> ---
>>
>>   I don't think this is correct. Which file could we use ?
> 
> I think you can completely remove ppc32_classify_syscall(), and instead add the following in the 
> default case in audit_classify_syscall():
> 
>       default:
> +        if (IS_ENABLED(CONFIG_PPC64) && abi == AUDIT_ARCH_PPC)
> +            return 1;
>           return 0;
> 

Forget that comment, it was crazy, because PPC32 and PPC64 use different syscall numbers.

By the way, I have submitted a patch to completely remove this stuff, see 
https://patchwork.ozlabs.org/project/linuxppc-dev/patch/dc14509a28a993738b1325211f412be72a4f9b1e.1629701132.git.christophe.leroy@csgroup.eu/

> 
>>
>>   arch/powerpc/include/asm/unistd.h | 3 +++
>>   arch/powerpc/kernel/audit.c       | 1 -
>>   2 files changed, 3 insertions(+), 1 deletion(-)
>>
>> diff --git a/arch/powerpc/include/asm/unistd.h b/arch/powerpc/include/asm/unistd.h
>> index b541c690a31c..d9025a7e973c 100644
>> --- a/arch/powerpc/include/asm/unistd.h
>> +++ b/arch/powerpc/include/asm/unistd.h
>> @@ -47,6 +47,9 @@
>>   #define __ARCH_WANT_SYS_UTIME
>>   #define __ARCH_WANT_SYS_NEWFSTATAT
>>   #define __ARCH_WANT_COMPAT_SYS_SENDFILE
>> +#ifdef CONFIG_AUDIT
>> +extern int ppc32_classify_syscall(unsigned int syscall);
>> +#endif
>>   #endif
>>   #define __ARCH_WANT_SYS_FORK
>>   #define __ARCH_WANT_SYS_VFORK
>> diff --git a/arch/powerpc/kernel/audit.c b/arch/powerpc/kernel/audit.c
>> index a2dddd7f3d09..c3c6c6a1069b 100644
>> --- a/arch/powerpc/kernel/audit.c
>> +++ b/arch/powerpc/kernel/audit.c
>> @@ -41,7 +41,6 @@ int audit_classify_arch(int arch)
>>   int audit_classify_syscall(int abi, unsigned syscall)
>>   {
>>   #ifdef CONFIG_PPC64
>> -    extern int ppc32_classify_syscall(unsigned);
>>       if (abi == AUDIT_ARCH_PPC)
>>           return ppc32_classify_syscall(syscall);
>>   #endif
>>