From f567a18590742b811287b7512fb0908deac4eef7 Mon Sep 17 00:00:00 2001
From: Manfred Spraul <manfred@colorfullife.com>
Date: Wed, 2 Nov 2011 13:38:56 -0700
Subject: [PATCH] include/linux/sem.h: make sysv_sem empty if SYSVIPC is
disabled
For the sysvsem undo, each task struct contains a sysv_sem structure with
a pointer to the undo information.
This pointer is only necessary if sysvipc is enabled - thus the pointer
can be made conditional on CONFIG_SYSVIPC.
Signed-off-by: Manfred Spraul <manfred@colorfullife.com>
Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Mike Galbraith <efault@gmx.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
include/linux/sem.h | 9 +++++++--
1 file changed, 7 insertions(+), 2 deletions(-)
diff --git a/include/linux/sem.h b/include/linux/sem.h
index 464842621a4aa2..10d6b226afc5ae 100644
--- a/include/linux/sem.h
+++ b/include/linux/sem.h
@@ -96,16 +96,21 @@ struct sem_array {
int complex_count; /* pending complex operations */
};
+#ifdef CONFIG_SYSVIPC
+
struct sysv_sem {
struct sem_undo_list *undo_list;
};
-#ifdef CONFIG_SYSVIPC
-
extern int copy_semundo(unsigned long clone_flags, struct task_struct *tsk);
extern void exit_sem(struct task_struct *tsk);
#else
+
+struct sysv_sem {
+ /* empty */
+};
+
static inline int copy_semundo(unsigned long clone_flags, struct task_struct *tsk)
{
return 0;
--
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