[PATCH v5 2/3] module: Move module_assert_mutex_or_preempt() to internal.h

Aaron Tomlin
2022-05-02T20:51:26Z

No functional change.

This patch migrates module_assert_mutex_or_preempt() to internal.h.
So, the aforementiond function can be used outside of main/or core
module code yet will remain restricted for internal use only.

Signed-off-by: Aaron Tomlin <atomlin@redhat.com>
---
kernel/module/internal.h | 12 ++++++++++++
kernel/module/main.c | 11 -----------
2 files changed, 12 insertions(+), 11 deletions(-)

diff --git a/kernel/module/internal.h b/kernel/module/internal.h
index abbd1c5ef264..0bdf64c9dfb5 100644
--- a/kernel/module/internal.h
+++ b/kernel/module/internal.h
@@ -10,6 +10,7 @@
#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/rculist.h>
+#include <linux/rcupdate.h>

#ifndef ARCH_SHF_SMALL
#define ARCH_SHF_SMALL 0
@@ -102,6 +103,17 @@ long module_get_offset(struct module *mod, unsigned int *size, Elf_Shdr *sechdr,
char *module_flags(struct module *mod, char *buf);
size_t module_flags_taint(unsigned long taints, char *buf);

+static inline void module_assert_mutex_or_preempt(void)
+{
+#ifdef CONFIG_LOCKDEP
+ if (unlikely(!debug_locks))
+ return;
+
+ WARN_ON_ONCE(!rcu_read_lock_sched_held() &&
+ !lockdep_is_held(&module_mutex));
+#endif
+}
+
static inline unsigned long kernel_symbol_value(const struct kernel_symbol *sym)
{
#ifdef CONFIG_HAVE_ARCH_PREL32_RELOCATIONS
diff --git a/kernel/module/main.c b/kernel/module/main.c
index 7dbdd098b995..7a0484900320 100644
--- a/kernel/module/main.c
+++ b/kernel/module/main.c
@@ -118,17 +118,6 @@ static void mod_update_bounds(struct module *mod)
#endif
}

-static void module_assert_mutex_or_preempt(void)
-{
-#ifdef CONFIG_LOCKDEP
- if (unlikely(!debug_locks))
- return;
-
- WARN_ON_ONCE(!rcu_read_lock_sched_held() &&
- !lockdep_is_held(&module_mutex));
-#endif
-}
-
/* Block module loading/unloading? */
int modules_disabled = 0;
core_param(nomodule, modules_disabled, bint, 0);
--
2.34.1