Subject: linux-next: build failure after merge of the printk tree

From: Stephen Rothwell <[email-masked]>
Date: Fri, 6 Dec 2019 09:25:03 +1100

Hi all,

After merging the printk tree, today's linux-next build (arm
multi_v7_defconfig) failed like this:

kernel/trace/trace.c: In function 'register_tracer':
kernel/trace/trace.c:1892:3: error: implicit declaration of function 'pr_warning'; did you mean 'pr_warn'? [-Werror=implicit-function-declaration]
 1892 |   pr_warning("Can not register tracer %s due to lockdown\n",
      |   ^~~~~~~~~~
      |   pr_warn

Caused by commit

  55130ba7f010 ("printk: Drop pr_warning definition")

interacting with commit

  a356646a5685 ("tracing: Do not create directories if lockdown is in affect")

from Linus' tree.

I have applied the following merge fix patch for today:

From: Stephen Rothwell <[email-masked]>
Date: Fri, 6 Dec 2019 09:21:57 +1100
Subject: [PATCH] fix up for "printk: Drop pr_warning definition"

Signed-off-by: Stephen Rothwell <[email-masked]>
---
 kernel/trace/ring_buffer.c | 2 +-
 kernel/trace/trace.c       | 6 +++---
 2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/kernel/trace/ring_buffer.c b/kernel/trace/ring_buffer.c
index 4bf050fcfe3b..3f655371eaf6 100644
--- a/kernel/trace/ring_buffer.c
+++ b/kernel/trace/ring_buffer.c
@@ -5070,7 +5070,7 @@ static __init int test_ringbuffer(void)
 	int ret = 0;
 
 	if (security_locked_down(LOCKDOWN_TRACEFS)) {
-		pr_warning("Lockdown is enabled, skipping ring buffer tests\n");
+		pr_warn("Lockdown is enabled, skipping ring buffer tests\n");
 		return 0;
 	}
 
diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index 23459d53d576..6c75410f9698 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -1889,7 +1889,7 @@ int __init register_tracer(struct tracer *type)
 	}
 
 	if (security_locked_down(LOCKDOWN_TRACEFS)) {
-		pr_warning("Can not register tracer %s due to lockdown\n",
+		pr_warn("Can not register tracer %s due to lockdown\n",
 			   type->name);
 		return -EPERM;
 	}
@@ -8796,7 +8796,7 @@ struct dentry *tracing_init_dentry(void)
 	struct trace_array *tr = &global_trace;
 
 	if (security_locked_down(LOCKDOWN_TRACEFS)) {
-		pr_warning("Tracing disabled due to lockdown\n");
+		pr_warn("Tracing disabled due to lockdown\n");
 		return ERR_PTR(-EPERM);
 	}
 
@@ -9244,7 +9244,7 @@ __init static int tracer_alloc_buffers(void)

 	if (security_locked_down(LOCKDOWN_TRACEFS)) {
-		pr_warning("Tracing disabled due to lockdown\n");
+		pr_warn("Tracing disabled due to lockdown\n");
 		return -EPERM;
 	}
 
-- 
2.24.0

-- 
Cheers,
Stephen Rothwell