From 56146a41bd3a13e759fbff557df54db2983a0910 Mon Sep 17 00:00:00 2001
From: hinus <hinus@163.com>
Date: Fri, 9 Jul 2021 01:36:45 +0800
Subject: [PATCH] Title: Initialization for static variables. Issue:
 https://gitee.com/hinus/linux_kernel_011/issues/I3ZTSO Description: Bugfix,
 initialize static variable 'start_buffer'.

---
 fs/buffer.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/fs/buffer.c b/fs/buffer.c
index ceb30e9..3c1a26b 100644
--- a/fs/buffer.c
+++ b/fs/buffer.c
@@ -7,7 +7,7 @@
 
 extern int end;
 
-struct buffer_head * start_buffer = (struct buffer_head *) &end;
+struct buffer_head * start_buffer;
 struct buffer_head * hash_table[NR_HASH];
 static struct buffer_head * free_list;
 static struct task_struct * buffer_wait = NULL;
@@ -160,6 +160,7 @@ struct buffer_head * bread(int dev,int block) {
 }
 
 void buffer_init(long buffer_end) {
+    start_buffer = (struct buffer_head *) &end;
     struct buffer_head * h = start_buffer;
     void * b;
     int i;
@@ -169,6 +170,8 @@ void buffer_init(long buffer_end) {
     else
         b = (void *) buffer_end;
 
+    printk("buffer start at %x, end at %x\n", h, b);
+
     while ( (b -= BLOCK_SIZE) >= ((void *) (h+1)) ) {
         h->b_dev = 0;
         h->b_dirt = 0;
-- 
Gitee