1*4882a593SmuzhiyunFrom 9fcd5003c0363af140a06aba94e62c9e1ea0381e Mon Sep 17 00:00:00 2001
2*4882a593SmuzhiyunFrom: Marc Gonzalez <marc_gonzalez@sigmadesigns.com>
3*4882a593SmuzhiyunDate: Mon, 11 Jan 2016 16:45:30 +0100
4*4882a593SmuzhiyunSubject: [PATCH] Fix fusion: Unknown symbol tasklist_lock (err 0)
5*4882a593Smuzhiyun
6*4882a593SmuzhiyunCommit 28f6569ab7d0 renamed TREE_PREEMPT_RCU to PREEMPT_RCU in 3.19
7*4882a593SmuzhiyunAs a result, the code incorrectly falls back to using tasklist_lock
8*4882a593Smuzhiyun(which was made private in 2.6.18)
9*4882a593Smuzhiyun
10*4882a593SmuzhiyunAlways use rcu_read_lock on modern kernels.
11*4882a593Smuzhiyun
12*4882a593SmuzhiyunSigned-off-by: Marc Gonzalez <marc_gonzalez@sigmadesigns.com>
13*4882a593Smuzhiyun---
14*4882a593Smuzhiyun linux/drivers/char/fusion/fusionee.c | 4 ++--
15*4882a593Smuzhiyun 1 file changed, 2 insertions(+), 2 deletions(-)
16*4882a593Smuzhiyun
17*4882a593Smuzhiyundiff --git a/linux/drivers/char/fusion/fusionee.c b/linux/drivers/char/fusion/fusionee.c
18*4882a593Smuzhiyunindex ef067f5bc831..70cd0a665f98 100644
19*4882a593Smuzhiyun--- a/linux/drivers/char/fusion/fusionee.c
20*4882a593Smuzhiyun+++ b/linux/drivers/char/fusion/fusionee.c
21*4882a593Smuzhiyun@@ -925,7 +925,7 @@ fusionee_kill(FusionDev * dev,
22*4882a593Smuzhiyun                if (f != fusionee && (!target || target == f->id)) {
23*4882a593Smuzhiyun                     struct task_struct *p;
24*4882a593Smuzhiyun
25*4882a593Smuzhiyun-#if defined(CONFIG_TREE_RCU) || defined(CONFIG_TREE_PREEMPT_RCU) || defined(CONFIG_TINY_RCU) || defined(rcu_read_lock)
26*4882a593Smuzhiyun+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0)
27*4882a593Smuzhiyun                     rcu_read_lock();
28*4882a593Smuzhiyun #else
29*4882a593Smuzhiyun                     read_lock(&tasklist_lock);
30*4882a593Smuzhiyun@@ -946,7 +946,7 @@ fusionee_kill(FusionDev * dev,
31*4882a593Smuzhiyun                          }
32*4882a593Smuzhiyun                     }
33*4882a593Smuzhiyun
34*4882a593Smuzhiyun-#if defined(CONFIG_TREE_RCU) || defined(CONFIG_TREE_PREEMPT_RCU) || defined(CONFIG_TINY_RCU) || defined(rcu_read_unlock)
35*4882a593Smuzhiyun+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0)
36*4882a593Smuzhiyun                     rcu_read_unlock();
37*4882a593Smuzhiyun #else
38*4882a593Smuzhiyun                     read_unlock(&tasklist_lock);
39