linux-kernel - [patch 12/14] x86, ds: re-add exit warning

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Message-ID: <20090327102708.A11708@sedona.ch.intel.com>
Date:	Fri, 27 Mar 2009 10:27:08 +0100
From:	Markus Metzger <markus.t.metzger@...el.com>
To:	linux-kernel@...r.kernel.org, mingo@...e.hu, tglx@...utronix.de,
	hpa@...or.com
Cc:	markus.t.metzger@...el.com, markus.t.metzger@...il.com,
	roland@...hat.com, eranian@...glemail.com, oleg@...hat.com,
	juan.villacis@...el.com, ak@...ux.jf.intel.com
Subject: [patch 12/14] x86, ds: re-add exit warning

Re-add a warning that had been removed with an earlier patch.
Patch 3 does bts cleanup earlier, so the warning makes sense, again.

Move the warning from exit to release.


Signed-off-by: Markus Metzger <markus.t.metzger@...el.com>
---

Index: git-tip/arch/x86/kernel/ds.c
===================================================================
--- git-tip.orig/arch/x86/kernel/ds.c	2009-03-27 08:04:39.000000000 +0100
+++ git-tip/arch/x86/kernel/ds.c	2009-03-27 08:04:53.000000000 +0100
@@ -1309,10 +1309,6 @@ void ds_copy_thread(struct task_struct *
 	tsk->thread.ds_ctx = NULL;
 }
 
-void ds_exit_thread(struct task_struct *tsk)
-{
-}
-
 static __init int ds_selftest(void)
 {
 	if (ds_cfg.sizeof_rec[ds_bts]) {
Index: git-tip/arch/x86/include/asm/ds.h
===================================================================
--- git-tip.orig/arch/x86/include/asm/ds.h	2009-03-27 08:01:13.000000000 +0100
+++ git-tip/arch/x86/include/asm/ds.h	2009-03-27 08:04:53.000000000 +0100
@@ -292,7 +292,6 @@ extern void ds_switch_to(struct task_str
  * Task clone/init and cleanup work
  */
 extern void ds_copy_thread(struct task_struct *tsk, struct task_struct *father);
-extern void ds_exit_thread(struct task_struct *tsk);
 
 #else /* CONFIG_X86_DS */
 
@@ -302,7 +301,6 @@ static inline void ds_switch_to(struct t
 				struct task_struct *next) {}
 static inline void ds_copy_thread(struct task_struct *tsk,
 				  struct task_struct *father) {}
-static inline void ds_exit_thread(struct task_struct *tsk) {}
 
 #endif /* CONFIG_X86_DS */
 #endif /* _ASM_X86_DS_H */
Index: git-tip/arch/x86/kernel/process.c
===================================================================
--- git-tip.orig/arch/x86/kernel/process.c	2009-03-27 07:59:21.000000000 +0100
+++ git-tip/arch/x86/kernel/process.c	2009-03-27 08:04:53.000000000 +0100
@@ -82,8 +82,6 @@ void exit_thread(void)
 		t->io_bitmap_max = 0;
 		put_cpu();
 	}
-
-	ds_exit_thread(current);
 }
 
 void flush_thread(void)
Index: git-tip/arch/x86/kernel/process_32.c
===================================================================
--- git-tip.orig/arch/x86/kernel/process_32.c	2009-03-27 07:59:21.000000000 +0100
+++ git-tip/arch/x86/kernel/process_32.c	2009-03-27 08:04:53.000000000 +0100
@@ -234,6 +234,8 @@ void release_thread(struct task_struct *
 {
 	BUG_ON(dead_task->mm);
 	release_vm86_irqs(dead_task);
+
+	WARN(dead_task->thread.ds_ctx, "leaking DS context\n");
 }
 
 /*
Index: git-tip/arch/x86/kernel/process_64.c
===================================================================
--- git-tip.orig/arch/x86/kernel/process_64.c	2009-03-27 07:59:21.000000000 +0100
+++ git-tip/arch/x86/kernel/process_64.c	2009-03-27 08:04:53.000000000 +0100
@@ -248,6 +248,8 @@ void release_thread(struct task_struct *
 			BUG();
 		}
 	}
+
+	WARN(dead_task->thread.ds_ctx, "leaking DS context\n");
 }
 
 static inline void set_32bit_tls(struct task_struct *t, int tls, u32 addr)
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