From: Al Viro <viro@zeniv.linux.org.uk>
Date: Tue, 5 Mar 2013 20:36:40 +0000 (-0500)
Subject: syscalls.h: slightly reduce the jungles of macros
X-Git-Tag: omap-for-v3.10/dt-fixes-for-merge-window~87^2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=99e621f796d7f0341a51e8cdf32b81663b10b448;p=pandora-kernel.git

syscalls.h: slightly reduce the jungles of macros

a) teach __MAP(num, m, <list of type/name pairs>) to take empty
list (with num being 0, of course)
b) fold types__... and args__... declaration and initialization into
SYSCALL_METADATA(num, ...), making their use conditional on num != 0.
That allows to use the SYSCALL_METADATA instead of its near-duplicate
in SYSCALL_DEFINE0.
c) make SYSCALL_METADATA expand to nothing in case if CONFIG_FTRACE_SYSCALLS
is not defined; that allows to make SYSCALL_DEFINE0 and SYSCALL_DEFINEx
definitions independent from CONFIG_FTRACE_SYSCALLS.
d) kill SYSCALL_DEFINE - no users left (SYSCALL_DEFINE[0-6] is, of course,
still alive and well).

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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