Re: [PATCH] x86: always use SYSCALL_DEFINE*

["Tautschnig, Michael" <tautschn@amazon.co.uk>]

On 10 Mar 2018, at 20:55, Tautschnig, Michael <tautschn@amazon.co.uk> wrote:
> 
> All syscall arguments are passed in as types of the same byte size as
> unsigned long (width of full registers). Using a smaller type without a
> cast may result in losing bits of information. SYSCALL_DEFINE* introduce
> adequate type casts. All definitions of syscalls in x86 except for those
> patched here have already been using the appropriate SYSCALL_DEFINE*.
[...]

Additional context: I had previously made an attempt to ensure type
consistency of sys_ioperm as "Syscall arguments are unsigned long (full
registers)" (https://lkml.org/lkml/2016/7/4/336). I hope the new proposal
is more acceptable.

Best,
Michael



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