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Subject[PATCH v4 1/7] module: Add lock_modules() and unlock_modules()
Date
Add wrapper functions for acquiring module_mutex so that the locking can
be implicitly compiled out when CONFIG_MODULES is not enabled.

Cc: Andi Kleen <ak@linux.intel.com>
Suggested-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
---
include/linux/module.h | 18 ++++++++++++++++++
1 file changed, 18 insertions(+)

diff --git a/include/linux/module.h b/include/linux/module.h
index 2e6670860d27..8850b9692b8f 100644
--- a/include/linux/module.h
+++ b/include/linux/module.h
@@ -705,6 +705,16 @@ static inline bool is_livepatch_module(struct module *mod)
bool is_module_sig_enforced(void);
void set_module_sig_enforced(void);

+static inline void lock_modules(void)
+{
+ mutex_lock(&module_mutex);
+}
+
+static inline void unlock_modules(void)
+{
+ mutex_unlock(&module_mutex);
+}
+
#else /* !CONFIG_MODULES... */

static inline struct module *__module_address(unsigned long addr)
@@ -852,6 +862,14 @@ void *dereference_module_function_descriptor(struct module *mod, void *ptr)
return ptr;
}

+static inline void lock_modules(void)
+{
+}
+
+static inline void unlock_modules(void)
+{
+}
+
#endif /* CONFIG_MODULES */

#ifdef CONFIG_SYSFS
--
2.25.1
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