new:kzalloc

kernel/common/compiler.h

@@ -1,5 +1,7 @@
 #pragma once
 
+#define __force __attribute__((force))
+
 #define likely(x) __builtin_expect(!!(x), 1)
 #define unlikely(x) __builtin_expect(!!(x), 0)
 

kernel/common/gfp.h

@@ -0,0 +1,8 @@
+#pragma once
+#include <common/sys/types.h>
+#include <common/compiler.h>
+/**
+ * __GFP_ZERO: 获取内存的同时，将获取到的这块内存清空
+ *
+ */
+#define __GFP_ZERO ((gfp_t)(1UL << 0))

kernel/common/mutex.c

@@ -37,14 +37,14 @@ void mutex_lock(mutex_t *lock)
         spin_lock(&lock->wait_lock);
         if (likely(mutex_is_locked(lock)))
         {
-            struct mutex_waiter_t *waiter = (struct mutex_waiter_t *)kmalloc(sizeof(struct mutex_waiter_t), 0);
+            struct mutex_waiter_t *waiter = (struct mutex_waiter_t *)kzalloc(sizeof(struct mutex_waiter_t), 0);
             if (waiter == NULL)
             {
                 kerror("In mutex_lock: no memory to alloc waiter. Program's behaviour might be indetermined!");
                 spin_unlock(&lock->wait_lock);
                 return;
             }
-            memset(waiter, 0, sizeof(struct mutex_waiter_t));
+            // memset(waiter, 0, sizeof(struct mutex_waiter_t));
             waiter->pcb = current_pcb;
             list_init(&waiter->list);
             list_append(&lock->wait_list, &waiter->list);

kernel/common/sys/types.h

@@ -83,4 +83,6 @@ typedef struct __pthread_spinlock_t
 typedef struct __pthread_condattr_t
 {
     int clockid; // clockid_t
-} pthread_condattr_t;
+} pthread_condattr_t;
+
+typedef uint64_t gfp_t;