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

From: Steven Rostedt
Date: Wed Mar 08 2017 - 15:34:58 EST


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

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

From: Dan Murphy <dmurphy@xxxxxx>

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@xxxxxx>
[bigeasy: merge the two patches from Dan into one, adapt changelog]
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@xxxxxxxxxxxxx>
Signed-off-by: Steven Rostedt (VMware) <rostedt@xxxxxxxxxxx>
---
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