linux-kernel - [PATCH 02/10] UAPI: Make uapi/linux/irqnr.h non-empty

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Message-ID: <20121017141536.29084.8653.stgit@warthog.procyon.org.uk>
Date:	Wed, 17 Oct 2012 15:15:36 +0100
From:	David Howells <dhowells@...hat.com>
To:	torvalds@...l.org
Cc:	dhowells@...hat.com, linux-kernel@...r.kernel.org,
	David Howells <dhowells@...hat.com>,
	Randy Dunlap <rdunlap@...otime.net>,
	Alessandro Suardi <alessandro.suardi@...il.com>
Subject: [PATCH 02/10] UAPI: Make uapi/linux/irqnr.h non-empty

uapi/linux/irqnr.h was emitted by the UAPI disintegration script as an empty
file because the parent linux/irqnr.h had no UAPI stuff in it, despite being
marked with "header-y".

Unfortunately, the patch program deletes the empty file when applying a kernel
patch.

It's not clear why this file is part of the UAPI at all.  Looking in:

	/usr/include/linux/irqnr.h

there's nothing there but a header reinclusion guard and a comment.

So just stick a comment in there as a placeholder.

Without this, if the kernel is fabricated from, say, a tarball and a patch, you
can get this error when building x86_64 or usermode Linux (and probably
others):

include/linux/irqnr.h:4:30: fatal error: uapi/linux/irqnr.h: No such file or directory

Reported-by: Randy Dunlap <rdunlap@...otime.net>
Reported-by: Alessandro Suardi <alessandro.suardi@...il.com>
Signed-off-by: David Howells <dhowells@...hat.com>
cc: Randy Dunlap <rdunlap@...otime.net>
cc: Alessandro Suardi <alessandro.suardi@...il.com>
---

 include/uapi/linux/irqnr.h |    4 ++++
 1 file changed, 4 insertions(+)

diff --git a/include/uapi/linux/irqnr.h b/include/uapi/linux/irqnr.h
index e69de29..ae5704f 100644
--- a/include/uapi/linux/irqnr.h
+++ b/include/uapi/linux/irqnr.h
@@ -0,0 +1,4 @@
+/*
+ * There isn't anything here anymore, but the file must not be empty or patch
+ * will delete it.
+ */

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