linux-kernel - [PATCH] userfaultfd: drop dead code

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Date:   Tue, 16 May 2017 13:35:17 +0300
From:   "Mike Rapoport" <rppt@...ux.vnet.ibm.com>
To:     Andrew Morton <akpm@...ux-foundation.org>
Cc:     Andrea Arcangeli <aarcange@...hat.com>,
        linux-mm <linux-mm@...ck.org>,
        lkml <linux-kernel@...r.kernel.org>,
        Mike Rapoport <rppt@...ux.vnet.ibm.com>
Subject: [PATCH] userfaultfd: drop dead code

Calculation of start end end in __wake_userfault function are not used and
can be removed.

Signed-off-by: Mike Rapoport <rppt@...ux.vnet.ibm.com>
---
 fs/userfaultfd.c | 5 -----
 1 file changed, 5 deletions(-)

diff --git a/fs/userfaultfd.c b/fs/userfaultfd.c
index f7555fc..1446e9d 100644
--- a/fs/userfaultfd.c
+++ b/fs/userfaultfd.c
@@ -1101,11 +1101,6 @@ static ssize_t userfaultfd_read(struct file *file, char __user *buf,
 static void __wake_userfault(struct userfaultfd_ctx *ctx,
 			     struct userfaultfd_wake_range *range)
 {
-	unsigned long start, end;
-
-	start = range->start;
-	end = range->start + range->len;
-
 	spin_lock(&ctx->fault_pending_wqh.lock);
 	/* wake all in the range and autoremove */
 	if (waitqueue_active(&ctx->fault_pending_wqh))
-- 
2.7.4