From 869ec0c230c37a50be289bc154d109a2cba1dd6c Mon Sep 17 00:00:00 2001
From: Steven Rostedt <srostedt@redhat.com>
Date: Wed, 29 Apr 2009 00:23:13 -0400
Subject: [PATCH] --- yaml --- r: 146067 b: refs/heads/master c:
 93459c6cb9816c52200993d29dd18cea1daee335 h: refs/heads/master i:   146065:
 6d6b53b4eebe87c42ef0932136e66c5607e6ce25   146063:
 6558792c164b9b81f841f54319b4cf28d1d51dce v: v3

---
 [refs]                     | 2 +-
 trunk/kernel/trace/trace.c | 8 ++++++--
 2 files changed, 7 insertions(+), 3 deletions(-)

diff --git a/[refs] b/[refs]
index d6fc4586fe51..2f02af4b0ac3 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 5beae6efd1004b44c3e257dc96087978e4c763c1
+refs/heads/master: 93459c6cb9816c52200993d29dd18cea1daee335
diff --git a/trunk/kernel/trace/trace.c b/trunk/kernel/trace/trace.c
index 9058240c85ca..0aeb3b93414e 100644
--- a/trunk/kernel/trace/trace.c
+++ b/trunk/kernel/trace/trace.c
@@ -3508,7 +3508,7 @@ tracing_buffers_splice_read(struct file *file, loff_t *ppos,
 		.spd_release	= buffer_spd_release,
 	};
 	struct buffer_ref *ref;
-	int size, i;
+	int entries, size, i;
 	size_t ret;
 
 	if (*ppos & (PAGE_SIZE - 1)) {
@@ -3523,7 +3523,9 @@ tracing_buffers_splice_read(struct file *file, loff_t *ppos,
 		len &= PAGE_MASK;
 	}
 
-	for (i = 0; i < PIPE_BUFFERS && len; i++, len -= PAGE_SIZE) {
+	entries = ring_buffer_entries_cpu(info->tr->buffer, info->cpu);
+
+	for (i = 0; i < PIPE_BUFFERS && len && entries; i++, len -= PAGE_SIZE) {
 		struct page *page;
 		int r;
 
@@ -3564,6 +3566,8 @@ tracing_buffers_splice_read(struct file *file, loff_t *ppos,
 		spd.partial[i].private = (unsigned long)ref;
 		spd.nr_pages++;
 		*ppos += PAGE_SIZE;
+
+		entries = ring_buffer_entries_cpu(info->tr->buffer, info->cpu);
 	}
 
 	spd.nr_pages = i;