kernel: start working on 3.18 support

This commit:
1) Copies 3.14 patches
2) Drops mainlined stuff
3) Modifies some patches to apply

Signed-off-by: Rafał Miłecki <zajec5@gmail.com>

SVN-Revision: 43093

1 files changed, 129 insertions, 0 deletions

diff --git a/target/linux/generic/patches-3.18/503-yaffs-3.12-convert-readdir-to-iterate.patch b/target/linux/generic/patches-3.18/503-yaffs-3.12-convert-readdir-to-iterate.patch
new file mode 100644
index 0000000000..586c141e0a
--- /dev/null
+++ b/target/linux/generic/patches-3.18/503-yaffs-3.12-convert-readdir-to-iterate.patch
@@ -0,0 +1,129 @@
+--- a/fs/yaffs2/yaffs_vfs.c
++++ b/fs/yaffs2/yaffs_vfs.c
+@@ -1701,6 +1701,110 @@ static void yaffs_remove_obj_callback(st
+ 
+ /*-----------------------------------------------------------------*/
+ 
++#if (LINUX_VERSION_CODE >= KERNEL_VERSION(3, 12, 0))
++static int yaffs_readdir(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)
+ {
+ 	struct yaffs_obj *obj;
+@@ -1807,10 +1911,15 @@ out:
+ 
+ 	return ret_val;
+ }
++#endif
+ 
+ static const struct file_operations yaffs_dir_operations = {
+ 	.read = generic_read_dir,
++#if (LINUX_VERSION_CODE >= KERNEL_VERSION(3, 12, 0))
++	.iterate = yaffs_readdir,
++#else
+ 	.readdir = yaffs_readdir,
++#endif
+ 	.fsync = yaffs_sync_object,
+ 	.llseek = generic_file_llseek,
+ };