linux-kernel - Re: Remaining randconfig objtool warnings, linux-next-20200428

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Date:   Wed, 29 Apr 2020 18:28:35 -0500
From:   Josh Poimboeuf <jpoimboe@...hat.com>
To:     Arnd Bergmann <arnd@...db.de>
Cc:     Peter Zijlstra <peterz@...radead.org>,
        the arch/x86 maintainers <x86@...nel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Kees Cook <keescook@...omium.org>
Subject: Re: Remaining randconfig objtool warnings, linux-next-20200428

On Wed, Apr 29, 2020 at 06:11:15PM -0500, Josh Poimboeuf wrote:
> > We can probably move those SYS_NI() instances to kernel/sys_ni.c,
> > which does not include the header, but it's still a bit ugly. I'll try
> > that tomorrow
> > unless you come up with a better suggestion first.
> 
> Oh I guess arm32 doesn't have SYS_NI defined.  All this syscall aliasing
> stuff is a total mystery to me.

Another idea would be to split up syscalls.h into two files: one for
SYSCALL_* macros and one for sys_*() function prototypes.  It sounds
like the latter aren't needed by most header files anyway.

 * Please note that these prototypes here are only provided for information
 * purposes, for static analysis, and for linking from the syscall table.
 * These functions should not be called elsewhere from kernel code.

-- 
Josh