From 1fa0dc9a49d024c4a421116e326ee561f0aaeebe Mon Sep 17 00:00:00 2001
From: binarycraft007 <elliot.huang.signed@gmail.com>
Date: Thu, 8 Feb 2024 22:41:55 +0800
Subject: [PATCH] kernel: fix build errors for clang

---
 kernel/include/cache.h                | 4 ++--
 kernel/linux/include/linux/rcupdate.h | 9 ++++++++-
 kernel/patch/module/module.c          | 5 +++--
 3 files changed, 13 insertions(+), 5 deletions(-)

diff --git a/kernel/include/cache.h b/kernel/include/cache.h
index 1c0c4e24..48f35fc3 100644
--- a/kernel/include/cache.h
+++ b/kernel/include/cache.h
@@ -45,7 +45,7 @@ enum dma_data_direction
 static inline uint32_t current_el(void)
 {
     uint32_t el;
-    asm volatile("mrs %0, CurrentEL" : "=r"(el));
+    asm volatile("mrs %w0, CurrentEL" : "=r"(el));
     return el >> 2;
 }
 
@@ -115,4 +115,4 @@ void __dma_flush_range(unsigned long start, unsigned long end);
 void __dma_map_area(unsigned long start, unsigned long size, enum dma_data_direction dir);
 void __dma_unmap_area(unsigned long start, unsigned long size, enum dma_data_direction dir);
 
-#endif
\ No newline at end of file
+#endif
diff --git a/kernel/linux/include/linux/rcupdate.h b/kernel/linux/include/linux/rcupdate.h
index 43090ad7..f87c7f40 100644
--- a/kernel/linux/include/linux/rcupdate.h
+++ b/kernel/linux/include/linux/rcupdate.h
@@ -78,6 +78,7 @@ static inline void synchronize_rcu(void)
 static inline unsigned long get_completed_synchronize_rcu(void)
 {
     kfunc_call(get_completed_synchronize_rcu)
+    return 0;
 }
 static inline void get_completed_synchronize_rcu_full(struct rcu_gp_oldstate *rgosp)
 {
@@ -136,18 +137,22 @@ static inline void rcu_irq_work_resched(void)
 static inline int rcu_read_lock_held(void)
 {
     kfunc_call(rcu_read_lock_held);
+    return 0;
 }
 static inline int rcu_read_lock_bh_held(void)
 {
     kfunc_call(rcu_read_lock_bh_held);
+    return 0;
 }
 static inline int rcu_read_lock_sched_held(void)
 {
     kfunc_call(rcu_read_lock_sched_held);
+    return 0;
 }
 static inline int rcu_read_lock_any_held(void)
 {
     kfunc_call(rcu_read_lock_any_held);
+    return 0;
 }
 
 static inline void rcu_init_nohz(void)
@@ -157,10 +162,12 @@ static inline void rcu_init_nohz(void)
 static inline int rcu_nocb_cpu_offload(int cpu)
 {
     kfunc_call(rcu_nocb_cpu_offload, cpu);
+    return 0;
 }
 static inline int rcu_nocb_cpu_deoffload(int cpu)
 {
     kfunc_call(rcu_nocb_cpu_deoffload, cpu);
+    return 0;
 }
 static inline void rcu_nocb_flush_deferred_wakeup(void)
 {
@@ -343,4 +350,4 @@ static inline bool rcu_head_after_call_rcu(struct rcu_head *rhp, rcu_callback_t
     return false;
 }
 
-#endif
\ No newline at end of file
+#endif
diff --git a/kernel/patch/module/module.c b/kernel/patch/module/module.c
index 7d30bfbc..ade08a9f 100644
--- a/kernel/patch/module/module.c
+++ b/kernel/patch/module/module.c
@@ -175,6 +175,7 @@ static int simplify_symbols(struct module *mod, const struct load_info *info)
     int ret = 0;
 
     for (i = 1; i < symsec->sh_size / sizeof(Elf_Sym); i++) {
+        unsigned long addr;
         const char *name = info->strtab + sym[i].st_name;
         switch (sym[i].st_shndx) {
         case SHN_COMMON:
@@ -186,7 +187,7 @@ static int simplify_symbols(struct module *mod, const struct load_info *info)
         case SHN_ABS:
             break;
         case SHN_UNDEF:
-            unsigned long addr = symbol_lookup_name(name);
+            addr = symbol_lookup_name(name);
             // kernel symbol cause overflow in relocation
             // if (!addr) addr = kallsyms_lookup_name(name);
             if (!addr) {
@@ -674,4 +675,4 @@ int module_init()
     INIT_LIST_HEAD(&modules.list);
     spin_lock_init(&module_lock);
     return 0;
-}
\ No newline at end of file
+}