Re: [PATCH] generic/473: test return EBUSY from BLKRRPART for mounted whole-dev

[Xiao Yang <yangx.jy@cn.fujitsu.com>]

On 2017/12/19 18:53, Johannes Thumshirn wrote:
> Xiao Yang<yangx.jy@cn.fujitsu.com>  writes:
>> [root@RHEL6U9GA_Intel64 blktests]# make
>> make -C src all
>> make[1]: Entering directory `/root/blktests/src'
>> cc -Wall -o sg/syzkaller1 -O2 sg/syzkaller1.c
>> sg/syzkaller1.c: In function ‘segv_handler’:
>> sg/syzkaller1.c:118: warning: implicit declaration of function
>> ‘__atomic_load_n’
>> sg/syzkaller1.c:118: error: ‘__ATOMIC_RELAXED’ undeclared (first use
>> in this function)
>> sg/syzkaller1.c:118: error: (Each undeclared identifier is reported
>> only once
>> sg/syzkaller1.c:118: error: for each function it appears in.)
>> sg/syzkaller1.c: In function ‘syz_open_dev’:
>> sg/syzkaller1.c:204: warning: implicit declaration of function
>> ‘__atomic_fetch_add’
>> sg/syzkaller1.c:204: error: ‘__ATOMIC_SEQ_CST’ undeclared (first use
>> in this function)
>> sg/syzkaller1.c:204: warning: implicit declaration of function
>> ‘__atomic_fetch_sub’
>> sg/syzkaller1.c: In function ‘test’:
>> sg/syzkaller1.c:406: error: ‘__ATOMIC_SEQ_CST’ undeclared (first use
>> in this function)
>> make[1]: *** [sg/syzkaller1] Error 1
>> make[1]: Leaving directory `/root/blktests/src'
>> make: *** [all] Error 2
>> -----------------------------------------------------------------------------------------------------------------------
>>
>> It seems that __atomic_* functions are not available, and could you
>> tell me how to fix
>> the compiler error?
> It seems like gcc 4.4 is too old to handle __ATOMIC_*. The oldest
> version of gcc I tried was 4.8 which could handle this code perfectly
> fine.
>
> I think we need hacks in the makefile to see which compiler version we
> have and conditionally compile the code.
Hi Johannes,

Thanks for your quick reply.  i will try to fix it as you suggested.

Thanks,
Xiao Yang
> Byte,
>          Johannes
>