linux-kernel - [PATCH 07/12] atm: hide 'struct zatm_t

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Message-Id: <1443612402-3000775-8-git-send-email-arnd@arndb.de>
Date:	Wed, 30 Sep 2015 13:26:37 +0200
From:	Arnd Bergmann <arnd@...db.de>
To:	netdev@...r.kernel.org
Cc:	y2038@...ts.linaro.org, linux-kernel@...r.kernel.org,
	"David S. Miller" <davem@...emloft.net>,
	Arnd Bergmann <arnd@...db.de>,
	Chas Williams <3chas3@...il.com>,
	linux-atm-general@...ts.sourceforge.net
Subject: [PATCH 07/12] atm: hide 'struct zatm_t_hist'

The zatm_t_hist structure is not used anywhere in the kernel, but is
exported to user space. As we are trying to eliminate uses of time_t
in the kernel for y2038 compatibility, the current definition triggers
checking tools because it contains 'struct timeval'.

We can work around this by adding '#ifdef __KERNEL__'. I could not find
out what the structure is actually used for, so this is the safe choice
in case there is some user space tool that relies on the definition.

If we are sure that nothing in user space relies on the structure, we
can instead remove the definition completely.

Signed-off-by: Arnd Bergmann <arnd@...db.de>
Cc: Chas Williams <3chas3@...il.com>
Cc: linux-atm-general@...ts.sourceforge.net
---
 include/uapi/linux/atm_zatm.h | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/include/uapi/linux/atm_zatm.h b/include/uapi/linux/atm_zatm.h
index 10f0fa29454f..2908ea86e6f2 100644
--- a/include/uapi/linux/atm_zatm.h
+++ b/include/uapi/linux/atm_zatm.h
@@ -35,11 +35,12 @@ struct zatm_pool_req {
 	struct zatm_pool_info info;	/* actual information */
 };
 
+#ifndef __KERNEL__
 struct zatm_t_hist {
 	struct timeval real;		/* real (wall-clock) time */
 	struct timeval expected;	/* expected real time */
 };
-
+#endif
 
 #define ZATM_OAM_POOL		0	/* free buffer pool for OAM cells */
 #define ZATM_AAL0_POOL		1	/* free buffer pool for AAL0 cells */
-- 
2.1.0.rc2

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