linux-kernel - [PATCH] samples: watch_queue: add HEADERS

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Date:   Sat,  7 Sep 2019 11:06:31 +0900
From:   Masahiro Yamada <yamada.masahiro@...ionext.com>
To:     David Howells <dhowells@...hat.com>
Cc:     linux-kernel@...r.kernel.org, Arnd Bergmann <arnd@...db.de>,
        Masahiro Yamada <yamada.masahiro@...ionext.com>,
        Christian Brauner <christian@...uner.io>,
        Mauro Carvalho Chehab <mchehab+samsung@...nel.org>,
        Thomas Gleixner <tglx@...utronix.de>
Subject: [PATCH] samples: watch_queue: add HEADERS_INSTALL dependency

samples/watch_queue/Makefile specifies the header search path
-I$(objtree)/usr/include, which is probaby needed to include
<linux/watch_queue.h> etc.

To make it work properly, add "depends on HEADERS_INSTALL" so that
headers are installed into $(objtree)/usr/include before building
this sample.

Fixes: 7141642ed120 ("Add sample notification program")
Reported-by: Arnd Bergmann <arnd@...db.de>
Signed-off-by: Masahiro Yamada <yamada.masahiro@...ionext.com>
---

Arnd reported a build error:
https://lkml.org/lkml/2019/9/6/665

Missing "depends on HEADERS_INSTALL" is the only reason
I have in my mind.

If it still fails to build, I do not know why.


 samples/Kconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/samples/Kconfig b/samples/Kconfig
index 2c3e07addd38..d0761f29ccb0 100644
--- a/samples/Kconfig
+++ b/samples/Kconfig
@@ -171,6 +171,7 @@ config SAMPLE_VFS
 
 config SAMPLE_WATCH_QUEUE
 	bool "Build example /dev/watch_queue notification consumer"
+	depends on HEADERS_INSTALL
 	help
 	  Build example userspace program to use the new mount_notify(),
 	  sb_notify() syscalls and the KEYCTL_WATCH_KEY keyctl() function.
-- 
2.17.1