implement sys_munmap()

kernel/include/cls.h

@@ -37,6 +37,8 @@ struct cpu_local_var {
 	
 	int status;
 	int fs;
+
+	struct list_head pending_free_pages;
 } __attribute__((aligned(64)));
 
 

kernel/include/page.h

@@ -1,7 +1,21 @@
 #ifndef __HEADER_PAGE_H
 #define __HEADER_PAGE_H
 
+struct page {
+	struct list_head list;
+	uint64_t flags;
+	int64_t count;
+};
+
+/* flags */
+#define	PAGE_IN_LIST	0x0001UL
+
+struct page *phys_to_page(uintptr_t phys);
+uintptr_t page_to_phys(struct page *page);
+
 void *allocate_pages(int npages, enum ihk_mc_ap_flag flag);
 void free_pages(void *va, int npages);
+void begin_free_pages_pending(void);
+void finish_free_pages_pending(void);
 
 #endif

kernel/include/process.h

@@ -131,6 +131,8 @@ struct vm_range *lookup_process_memory_range(
 		struct process_vm *vm, uintptr_t start, uintptr_t end);
 struct vm_range *next_process_memory_range(
 		struct process_vm *vm, struct vm_range *range);
+struct vm_range *previous_process_memory_range(
+		struct process_vm *vm, struct vm_range *range);
 int remove_process_region(struct process *proc,
                           unsigned long start, unsigned long end);
 struct program_load_desc;