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[PATCH RT 6/7] lockdep: Fix compilation error for !CONFIG_MODULES and !CONFIG_SMP

From Steven Rostedt <rostedt@goodmis.org>
Newsgroups linux.kernel
Subject [PATCH RT 6/7] lockdep: Fix compilation error for !CONFIG_MODULES and !CONFIG_SMP
Date 2017-03-08 21:40 +0100
Message-ID <tiQxm-3cL-67@gated-at.bofh.it> (permalink)
References <tiQxj-3cL-3@gated-at.bofh.it>
Organization linux.* mail to news gateway

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3.12.70-rt95-rc1 stable review patch.
If anyone has any objections, please let me know.

------------------

From: Dan Murphy <dmurphy@ti.com>

When CONFIG_MODULES is not set then it fails to compile in lockdep:

|kernel/locking/lockdep.c: In function 'look_up_lock_class':
|kernel/locking/lockdep.c:684:12: error: implicit declaration of function
| '__is_module_percpu_address' [-Werror=implicit-function-declaration]

If CONFIG_MODULES is set but CONFIG_SMP is not, then it compiles but
fails link at the end:

|kernel/locking/lockdep.c:684: undefined reference to `__is_module_percpu_address'
|kernel/built-in.o:(.debug_addr+0x1e674): undefined reference to `__is_module_percpu_address'

This patch adds the function for both cases.

Signed-off-by: Dan Murphy <dmurphy@ti.com>
[bigeasy: merge the two patches from Dan into one, adapt changelog]
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
---
 include/linux/module.h | 5 +++++
 kernel/module.c        | 5 +++++
 2 files changed, 10 insertions(+)

diff --git a/include/linux/module.h b/include/linux/module.h
index 7ae21ed9453d..874504dcc825 100644
--- a/include/linux/module.h
+++ b/include/linux/module.h
@@ -543,6 +543,11 @@ static inline bool is_module_percpu_address(unsigned long addr)
 	return false;
 }
 
+static inline bool __is_module_percpu_address(unsigned long addr, unsigned long *can_addr)
+{
+	return false;
+}
+
 static inline bool is_module_text_address(unsigned long addr)
 {
 	return false;
diff --git a/kernel/module.c b/kernel/module.c
index 4347aa243941..64135e935223 100644
--- a/kernel/module.c
+++ b/kernel/module.c
@@ -604,6 +604,11 @@ bool is_module_percpu_address(unsigned long addr)
 	return false;
 }
 
+bool __is_module_percpu_address(unsigned long addr, unsigned long *can_addr)
+{
+	return false;
+}
+
 #endif /* CONFIG_SMP */
 
 #define MODINFO_ATTR(field)	\
-- 
2.10.2

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Thread

[PATCH RT 0/7] Linux 3.12.70-rt95-rc1 Steven Rostedt <rostedt@goodmis.org> - 2017-03-08 21:40 +0100
  [PATCH RT 7/7] Linux 3.12.70-rt95-rc1 Steven Rostedt <rostedt@goodmis.org> - 2017-03-08 21:40 +0100
  [PATCH RT 5/7] rt: Drop the removal of _GPL from rt_mutex_destroy()s EXPORT_SYMBOL Steven Rostedt <rostedt@goodmis.org> - 2017-03-08 21:40 +0100
  [PATCH RT 3/7] rt: Drop mutex_disable() on !DEBUG configs and the GPL suffix from  export symbol Steven Rostedt <rostedt@goodmis.org> - 2017-03-08 21:40 +0100
  [PATCH RT 6/7] lockdep: Fix compilation error for !CONFIG_MODULES and !CONFIG_SMP Steven Rostedt <rostedt@goodmis.org> - 2017-03-08 21:40 +0100
  [PATCH RT 2/7] x86/mm/cpa: avoid wbinvd() for PREEMPT Steven Rostedt <rostedt@goodmis.org> - 2017-03-08 22:00 +0100

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