linux-kernel - [PATCH 3/6] provide a generic io

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Message-Id: <20180104080325.14716-4-hch@lst.de>
Date:   Thu,  4 Jan 2018 09:03:22 +0100
From:   Christoph Hellwig <hch@....de>
To:     linux-aio@...ck.org
Cc:     Avi Kivity <avi@...lladb.com>, linux-fsdevel@...r.kernel.org,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH 3/6] provide a generic io_syscall6

This allows to call a 6-argument syscall using the generic syscall()
function from libc.  No arch-specific version is specified as it would
be a lot of effort for very little gain.

Signed-off-by: Christoph Hellwig <hch@....de>
---
 src/syscall.h | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/src/syscall.h b/src/syscall.h
index 3819519..e7ff81b 100644
--- a/src/syscall.h
+++ b/src/syscall.h
@@ -39,3 +39,12 @@
 #warning "using generic syscall method"
 #include "syscall-generic.h"
 #endif
+
+#ifndef io_syscall6
+#define io_syscall6(type,fname,sname,type1,arg1,type2,arg2,type3,arg3, \
+		type4,arg4,type5,arg5,type6,arg6) \
+type fname (type1 arg1,type2 arg2,type3 arg3,type4 arg4,type5 arg5, \
+		type6 arg6) \
+_body_io_syscall(sname, (long)arg1, (long)arg2, (long)arg3, (long)arg4, \
+               (long)arg5, (long)arg5)
+#endif /* io_syscall6 */
-- 
2.14.2