linux-kernel - [PATCH 1/3] futex: change signature of fetch_robust

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Message-Id: <1284468228-8723-1-git-send-email-namhyung@gmail.com>
Date:	Tue, 14 Sep 2010 21:43:46 +0900
From:	Namhyung Kim <namhyung@...il.com>
To:	Ingo Molnar <mingo@...e.hu>, Thomas Gleixner <tglx@...utronix.de>
Cc:	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Darren Hart <dvhltc@...ibm.com>, linux-kernel@...r.kernel.org
Subject: [PATCH 1/3] futex: change signature of fetch_robust_entry()

Make 3rd argument of fetch_robust_entry() 'unsigned int' in order to
remove following warnings from sparse:

 kernel/futex.c:2495:59: warning: incorrect type in argument 3 (different signedness)
 kernel/futex.c:2495:59:    expected int *pi
 kernel/futex.c:2495:59:    got unsigned int *<noident>
 kernel/futex.c:2506:67: warning: incorrect type in argument 3 (different signedness)
 kernel/futex.c:2506:67:    expected int *pi
 kernel/futex.c:2506:67:    got unsigned int *<noident>
 kernel/futex.c:2515:69: warning: incorrect type in argument 3 (different signedness)
 kernel/futex.c:2515:69:    expected int *pi
 kernel/futex.c:2515:69:    got unsigned int *<noident>

Since all of its users were using 'unsigned int' already, it could
be changed safely.

Signed-off-by: Namhyung Kim <namhyung@...il.com>
---
 kernel/futex.c        |    2 +-
 kernel/futex_compat.c |    2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/kernel/futex.c b/kernel/futex.c
index 6a3a5fa..464de27 100644
--- a/kernel/futex.c
+++ b/kernel/futex.c
@@ -2458,7 +2458,7 @@ retry:
  */
 static inline int fetch_robust_entry(struct robust_list __user **entry,
 				     struct robust_list __user * __user *head,
-				     int *pi)
+				     unsigned int *pi)
 {
 	unsigned long uentry;
 
diff --git a/kernel/futex_compat.c b/kernel/futex_compat.c
index d49afb2..06da4df 100644
--- a/kernel/futex_compat.c
+++ b/kernel/futex_compat.c
@@ -19,7 +19,7 @@
  */
 static inline int
 fetch_robust_entry(compat_uptr_t *uentry, struct robust_list __user **entry,
-		   compat_uptr_t __user *head, int *pi)
+		   compat_uptr_t __user *head, unsigned int *pi)
 {
 	if (get_user(*uentry, head))
 		return -EFAULT;
-- 
1.7.2.2

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