From: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Date: Fri, 9 Dec 2011 14:26:06 +0000 (-0500)
Subject: lttng lib: ring buffer remove duplicate null pointer
X-Git-Tag: v2.0-pre11~4
X-Git-Url: http://git.liburcu.org/?p=lttng-modules.git;a=commitdiff_plain;h=1deffc9b1233b244190924ebd315db7b3c802f85

lttng lib: ring buffer remove duplicate null pointer

This check is performed at mapping setup time in
lib_ring_buffer_mmap_buf() already, so we can safely remove this
duplicata.

Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
---

diff --git a/lib/ringbuffer/ring_buffer_mmap.c b/lib/ringbuffer/ring_buffer_mmap.c
index 68221ee9..cf374348 100644
--- a/lib/ringbuffer/ring_buffer_mmap.c
+++ b/lib/ringbuffer/ring_buffer_mmap.c
@@ -30,9 +30,6 @@ static int lib_ring_buffer_fault(struct vm_area_struct *vma, struct vm_fault *vm
 	void **virt;
 	unsigned long offset, sb_bindex;
 
-	if (!buf)
-		return VM_FAULT_OOM;
-
 	/*
 	 * Verify that faults are only done on the range of pages owned by the
 	 * reader.