[PATCH] riscv: Use __has_include__ to include <asm/syscalls.h> [BZ #24022]

[Florian Weimer]

* Mark Corbin:

> On 21/12/2018 17:48, H.J. Lu wrote:
>> ---
>>  sysdeps/unix/sysv/linux/riscv/flush-icache.c | 4 ++++
>>  1 file changed, 4 insertions(+)
>>
>> diff --git a/sysdeps/unix/sysv/linux/riscv/flush-icache.c b/sysdeps/unix/sysv/linux/riscv/flush-icache.c
>> index d612ef4c6c..d0ecec5107 100644
>> --- a/sysdeps/unix/sysv/linux/riscv/flush-icache.c
>> +++ b/sysdeps/unix/sysv/linux/riscv/flush-icache.c
>> @@ -21,7 +21,11 @@
>>  #include <stdlib.h>
>>  #include <atomic.h>
>>  #include <sys/cachectl.h>
>> +#if __has_include__ (<asm/syscalls.h>)
>>  #include <asm/syscalls.h>
>> +#else
>> +#include <asm/unistd.h>
>> +#endif
>>  
>>  typedef int (*func_type) (void *, void *, unsigned long int);
>>  
>
> Hello
>
> I was wondering whether it would be possible for somebody to backport
> this fix (commit id 0b9c84906f653978fb8768c7ebd0ee14a47e662e) from
> master to the release/2.28/master branch.
>
> The asm/syscalls.h file has been removed for RISC-V in the 4.20 kernel
> and this is currently causing glibc build failures for the RISC-V
> architecture under Buildroot (https://buildroot.org). I have a patch for
> glibc in Buildroot, but it would be good to use the upstream release.

I have now done so.

Thanks,
Florian