yaffs，linux3.11，内核编译时报错， error: unknown field 'readdir' specified in initializer

要编译linux3.11的内核，但是下载最新的yaffs2，之后编译报错： error: unknown field 'readdir' specified in initializer

看了源码后发现，在linux3.11的源码里的file_operations结构体里面没有readdir，取而代之的是iterate，但是在yaffs里面（fs/yaffs2/yaffs_vfs.c）还是用的是readdir，所以把该文件改写一下。

具体改变如下：

#if (LINUX_VERSION_CODE >= KERNEL_VERSION(3, 11, 0))
static int yaffs_iterate(struct file *file, struct dir_context *ctx)
{
struct yaffs_obj *obj;
struct yaffs_dev *dev;
struct yaffs_search_context *sc;
struct inode *inode = file->f_dentry->d_inode;
unsigned long offset, curoffs;
struct yaffs_obj *l;
int ret_val = 0;

char name[YAFFS_MAX_NAME_LENGTH + 1];

obj = yaffs_dentry_to_obj(file->f_dentry);
dev = obj->my_dev;

yaffs_gross_lock(dev);

yaffs_dev_to_lc(dev)->readdir_process = current;

offset = ctx->pos;

sc = yaffs_new_search(obj);
if (!sc) {
ret_val = -ENOMEM;
goto out;
}

yaffs_trace(YAFFS_TRACE_OS,"yaffs_readdir: starting at %d", (int)offset);
if (offset == 0) {
yaffs_trace(YAFFS_TRACE_OS, "yaffs_readdir: entry . ino %d", (int)inode->i_ino);
yaffs_gross_unlock(dev);
if (!dir_emit_dot(file, ctx)) {
yaffs_gross_lock(dev);
goto out;
}
yaffs_gross_lock(dev);
offset++;
ctx->pos++;
}
if (offset == 1) {
yaffs_trace(YAFFS_TRACE_OS, "yaffs_readdir: entry .. ino %d", (int)file->f_dentry->d_parent->d_inode->i_ino);
yaffs_gross_unlock(dev);
if (!dir_emit_dotdot(file, ctx)) {
yaffs_gross_lock(dev);
goto out;
}
yaffs_gross_lock(dev);
offset++;
ctx->pos++;
}

curoffs = 1;

/* If the directory has changed since the open or last call to readdir, rewind to after the 2 canned entries. */
if (file->f_version != inode->i_version) {
offset = 2;
ctx->pos = offset;
file->f_version = inode->i_version;
}

while (sc->next_return) {
curoffs++;
l = sc->next_return;
if (curoffs >= offset) {
int this_inode = yaffs_get_obj_inode(l);
int this_type = yaffs_get_obj_type(l);

yaffs_get_obj_name(l, name, YAFFS_MAX_NAME_LENGTH + 1);
yaffs_trace(YAFFS_TRACE_OS, "yaffs_readdir: %s inode %d", name, yaffs_get_obj_inode(l));

yaffs_gross_unlock(dev);

if (!dir_emit(ctx, name, strlen(name),this_inode, this_type) < 0) {
yaffs_gross_lock(dev);
goto out;
}

yaffs_gross_lock(dev);

offset++;
ctx->pos++;
}
yaffs_search_advance(sc);
}

out:
yaffs_search_end(sc);
yaffs_dev_to_lc(dev)->readdir_process = NULL;
yaffs_gross_unlock(dev);

return ret_val;
}
#else
static int yaffs_readdir(struct file *f, void *dirent, filldir_t filldir)
{
.....
}
#endif

static const struct file_operations yaffs_dir_operations = {
.read = generic_read_dir,
//	.readdir = yaffs_readdir,
//add by jxm begin
#if (LINUX_VERSION_CODE >= KERNEL_VERSION(3, 11, 0))
.iterate = yaffs_iterate,
#else
.readdir = yaffs_readdir,
#endif
//add by jxm end
.fsync = yaffs_sync_object,
.llseek = generic_file_llseek,
};

然后编译，就不报这个错了

参考网址：https://dev.openwrt.org/browser/trunk/target/linux/generic/patches-3.12/503-yaffs-3.12-convert-readdir-to-iterate.patch?rev=39084#L1911

还会报这个错：fs/yaffs2/yaffs_vfs.c:3501: error: implicit declaration of function 'create_proc_entry'，解决方法可以看我转载的这篇文章
http://blog.csdn.net/xiaominthere/article/details/17549607