From: Steven Rostedt <rostedt@goodmis.org>
Date: Tue, 17 Jun 2014 12:59:16 +0000 (-0400)
Subject: tracing: Add __field_struct macro for TRACE_EVENT()
X-Git-Tag: omap-for-v3.16/fixes-rc4~59^2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=4d4c9cc839a308be3289a361ccba4447ee140552;p=pandora-kernel.git

tracing: Add __field_struct macro for TRACE_EVENT()

Currently the __field() macro in TRACE_EVENT is only good for primitive
values, such as integers and pointers, but it fails on complex data types
such as structures or unions. This is because the __field() macro
determines if the variable is signed or not with the test of:

  (((type)(-1)) < (type)1)

Unfortunately, that fails when type is a structure.

Since trace events should support structures as fields a new macro
is created for such a case called __field_struct() which acts exactly
the same as __field() does but it does not do the signed type check
and just uses a constant false for that answer.

Cc: Tony Luck <tony.luck@gmail.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
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