linux-kernel - [PATCH] hw_breakpoint: remove sample code from hw

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Date:	Tue, 07 Jul 2009 13:40:11 +0800
From:	Li Zefan <lizf@...fujitsu.com>
To:	Ingo Molnar <mingo@...e.hu>
CC:	Alan Stern <stern@...land.harvard.edu>,
	"K.Prasad" <prasad@...ux.vnet.ibm.com>,
	Frederic Weisbecker <fweisbec@...il.com>,
	LKML <linux-kernel@...r.kernel.org>
Subject: [PATCH] hw_breakpoint: remove sample code from hw_breakpoint.h

The sample code is a bit out-dated, and there's already a
sample in sample/hw_breakpoint/.

Signed-off-by: Li Zefan <lizf@...fujitsu.com>
---
 include/asm-generic/hw_breakpoint.h |   41 +---------------------------------
 1 files changed, 2 insertions(+), 39 deletions(-)

diff --git a/include/asm-generic/hw_breakpoint.h b/include/asm-generic/hw_breakpoint.h
index 9bf2d12..30ab37c 100644
--- a/include/asm-generic/hw_breakpoint.h
+++ b/include/asm-generic/hw_breakpoint.h
@@ -60,45 +60,8 @@
  * Breakpoints are disabled during execution @triggered, to avoid
  * recursive traps and allow unhindered access to breakpointed memory.
  *
- * This sample code sets a breakpoint on pid_max and registers a callback
- * function for writes to that variable.  Note that it is not portable
- * as written, because not all architectures support HW_BREAKPOINT_LEN_4.
- *
- * ----------------------------------------------------------------------
- *
- * #include <asm/hw_breakpoint.h>
- *
- * struct hw_breakpoint my_bp;
- *
- * static void my_triggered(struct hw_breakpoint *bp, struct pt_regs *regs)
- * {
- * 	printk(KERN_DEBUG "Inside triggered routine of breakpoint exception\n");
- * 	dump_stack();
- *  	.......<more debugging output>........
- * }
- *
- * static struct hw_breakpoint my_bp;
- *
- * static int init_module(void)
- * {
- *	..........<do anything>............
- *	my_bp.info.type = HW_BREAKPOINT_WRITE;
- *	my_bp.info.len = HW_BREAKPOINT_LEN_4;
- *
- *	my_bp.installed = (void *)my_bp_installed;
- *
- *	rc = register_kernel_hw_breakpoint(&my_bp);
- *	..........<do anything>............
- * }
- *
- * static void cleanup_module(void)
- * {
- *	..........<do anything>............
- *	unregister_kernel_hw_breakpoint(&my_bp);
- *	..........<do anything>............
- * }
- *
- * ----------------------------------------------------------------------
+ * See sample/hw_breakpoint/ for a sample that sets a breakpoint on
+ * a specified kernel symbol.
  */
 struct hw_breakpoint {
 	void (*triggered)(struct hw_breakpoint *, struct pt_regs *);
-- 
1.5.4.rc3
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