linux-kernel - [PATCH] staging: lustre: ptlrpc: lproc_ptlrpc.c

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Date:	Thu, 31 Jul 2014 13:21:02 +0530
From:	Anil Belur <askb23@...il.com>
To:	kristina.martsenko@...il.com, andreas.dilger@...el.com,
	sarah.a.sharp@...ux.intel.com, gregkh@...uxfoundation.org
Cc:	devel@...verdev.osuosl.org, linux-kernel@...r.kernel.org,
	Anil Belur <askb23@...il.com>
Subject: [PATCH] staging: lustre: ptlrpc: lproc_ptlrpc.c - fix dereferenceing  user space buffer

- this fixes sparse warning for directly deferencing user space buffer

drivers/staging/lustre/lustre/ptlrpc/lproc_ptlrpc.c:652:33: warning: incorrect type in argument 2 (different address spaces)
drivers/staging/lustre/lustre/ptlrpc/lproc_ptlrpc.c:652:33:    expected void const [noderef] <asn:1>*from
drivers/staging/lustre/lustre/ptlrpc/lproc_ptlrpc.c:652:33:    got char const *buffer

Signed-off-by: Anil Belur <askb23@...il.com>
---
 drivers/staging/lustre/lustre/ptlrpc/lproc_ptlrpc.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/staging/lustre/lustre/ptlrpc/lproc_ptlrpc.c b/drivers/staging/lustre/lustre/ptlrpc/lproc_ptlrpc.c
index 6b9c6db..455c6c7 100644
--- a/drivers/staging/lustre/lustre/ptlrpc/lproc_ptlrpc.c
+++ b/drivers/staging/lustre/lustre/ptlrpc/lproc_ptlrpc.c
@@ -628,7 +628,8 @@ out:
  * if the optional token is omitted, the operation is performed on both the
  * regular and high-priority (if the service has one) NRS head.
  */
-static ssize_t ptlrpc_lprocfs_nrs_seq_write(struct file *file, const char *buffer,
+static ssize_t ptlrpc_lprocfs_nrs_seq_write(struct file *file,
+					const char __user *buffer,
 					size_t count, loff_t *off)
 {
 	struct ptlrpc_service *svc = ((struct seq_file *)file->private_data)->private;
-- 
1.9.1

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