linux-kernel - [PATCH] FRV: Fix no-hardware-breakpoint case

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Message-ID: <20091214140326.11689.80251.stgit@warthog.procyon.org.uk>
Date:	Mon, 14 Dec 2009 14:03:27 +0000
From:	David Howells <dhowells@...hat.com>
To:	torvalds@...l.org, akpm@...ux-foundation.org, fweisbec@...il.com
Cc:	dhowells@...hat.com, mingo@...e.hu, linux-kernel@...r.kernel.org
Subject: [PATCH] FRV: Fix no-hardware-breakpoint case

If there is no hardware breakpoint support, modify_user_hw_breakpoint() tries
to return a NULL pointer through as an 'int' return value:

In file included from kernel/exit.c:53:
include/linux/hw_breakpoint.h: In function 'modify_user_hw_breakpoint':
include/linux/hw_breakpoint.h:96: warning: return makes integer from pointer without a cast

Return 0 instead.

Signed-off-by: David Howells <dhowells@...hat.com>
---

 include/linux/hw_breakpoint.h |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)


diff --git a/include/linux/hw_breakpoint.h b/include/linux/hw_breakpoint.h
index 69f07a9..e268388 100644
--- a/include/linux/hw_breakpoint.h
+++ b/include/linux/hw_breakpoint.h
@@ -93,7 +93,7 @@ register_user_hw_breakpoint(struct perf_event_attr *attr,
 			    struct task_struct *tsk)	{ return NULL; }
 static inline int
 modify_user_hw_breakpoint(struct perf_event *bp,
-			  struct perf_event_attr *attr)	{ return NULL; }
+			  struct perf_event_attr *attr)	{ return 0; }
 static inline struct perf_event *
 register_wide_hw_breakpoint_cpu(struct perf_event_attr *attr,
 				perf_overflow_handler_t	 triggered,

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