[systemd-devel] [PATCH] Fix broken syscall(__NR_fanotify_mark... on 32bit mips.

[fykcee1 at gmail.com]

2011/4/21 David Daney <ddaney at caviumnetworks.com>:
>> Any comment whether this will break non-MIPS 32bit archs, like x86?
>
> It would break the MIPS n32 ABI userspace.
>
> On MIPS n32 we are still __LP64__, but 64-bit values are passed in a single
> register.
It isn't a problem. n32 syscall supports 64bit registers, and 64-bit
values should be passed in a single register. see
http://lxr.linux.no/linux+v2.6.38/arch/mips/kernel/scall64-n32.S#L426
(calls sys_fanotify_mark instead of sys_32_fanotify_mark,
sys_fanotify_mark won't merge_64(mask_low, merge_high))



-- 
Regards,
- cee1