From: Al Viro <viro@ZenIV.linux.org.uk>
To: Hans-Christian Egtvedt <egtvedt@samfundet.no>
Cc: Matthias Brugger <matthias.bgg@gmail.com>,
Haavard Skinnemoen <hskinnemoen@gmail.com>,
Andrew Morton <akpm@linux-foundation.org>,
"Paul E. McKenney" <paulmck@linux.vnet.ibm.com>,
David Howells <dhowells@redhat.com>,
Dave Jones <davej@redhat.com>, Will Deacon <will.deacon@arm.com>,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH] arch: avr32: add dummy syscalls
Date: Mon, 4 Feb 2013 00:10:55 +0000 [thread overview]
Message-ID: <20130204001055.GV4503@ZenIV.linux.org.uk> (raw)
In-Reply-To: <20130127203954.GA22063@samfundet.no>
On Sun, Jan 27, 2013 at 09:39:54PM +0100, Hans-Christian Egtvedt wrote:
> > If you are OK with going that way, I could probably put together patches doing
> > just that. Note that for rt_sigsuspend/rt_sigreturn/sigaltstack the wrappers
> > are not needed at all - they can just use current_pt_regs() in syscall body.
> > IOW, all of syscall-stubs.S could be killed.
>
> Nice, could you put together the preprocessor stuff in a patch? It would be
> great to not having to write a re-occuring stub for each syscall that has 6+
> arguments.
>
> Thanks for looking at this.
Apologies about the delay... One question: what's the AVR32 C ABI for
passing 64bit arguments? The tricky bugger is sys_sync_file_range();
it takes (s32, s64, s64, u32) as arguments and if not any pair of
registers can be used to pass 64bit value, we have more serious trouble
there...
next prev parent reply other threads:[~2013-02-04 0:11 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-01-27 12:50 [PATCH] arch: avr32: add dummy syscalls Matthias Brugger
2013-01-27 19:57 ` Hans-Christian Egtvedt
2013-01-27 20:30 ` Al Viro
2013-01-27 20:39 ` Hans-Christian Egtvedt
2013-02-04 0:10 ` Al Viro [this message]
2013-02-04 0:30 ` Al Viro
2013-02-04 1:31 ` Al Viro
2013-02-04 3:02 ` Al Viro
2013-02-04 4:52 ` Håvard Skinnemoen
2013-02-04 5:05 ` Al Viro
2013-02-04 5:35 ` Håvard Skinnemoen
2013-02-04 15:39 ` Al Viro
2013-02-04 16:34 ` Håvard Skinnemoen
2013-02-04 22:53 ` Al Viro
2013-02-05 8:06 ` Hans-Christian Egtvedt
2013-02-04 3:21 ` H. Peter Anvin
2013-01-28 2:45 ` Håvard Skinnemoen
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