yaffs2: Fix GCC 4.6 compile warnings

Fix:
yaffs_guts.c: In function 'yaffs_check_chunk_erased':
yaffs_guts.c:324:6: warning: variable 'result' set but not used
[-Wunused-but-set-variable]
yaffs_guts.c: In function 'yaffs_verify_chunk_written':
yaffs_guts.c:352:6: warning: variable 'result' set but not used
[-Wunused-but-set-variable]
yaffs_guts.c: In function 'yaffs_grab_chunk_cache':
yaffs_guts.c:1488:6: warning: variable 'pushout' set but not used
[-Wunused-but-set-variable]
yaffs_guts.c: In function 'yaffs_check_obj_details_loaded':
yaffs_guts.c:3180:6: warning: variable 'alloc_failed' set but not used
[-Wunused-but-set-variable]
yaffs_guts.c:3179:6: warning: variable 'result' set but not used
[-Wunused-but-set-variable]
yaffs_guts.c: In function 'yaffs_update_oh':
yaffs_guts.c:3288:6: warning: variable 'result' set but not used
[-Wunused-but-set-variable]
yaffs_guts.c: In function 'yaffs_get_obj_name':
yaffs_guts.c:4447:7: warning: variable 'result' set but not used
[-Wunused-but-set-variable]
yaffs_summary.c: In function 'yaffs_summary_read':
yaffs_summary.c:194:6: warning: variable 'sum_tags_bytes' set but not
used [-Wunused-but-set-variable]
yaffs_verify.c: In function 'yaffs_verify_file':
yaffs_verify.c:227:6: warning: variable 'actual_depth' set but not used
[-Wunused-but-set-variable]
yaffs_yaffs1.c: In function 'yaffs1_scan':
yaffs_yaffs1.c:26:6: warning: variable 'result' set but not used
[-Wunused-but-set-variable]
yaffs_yaffs2.c: In function 'yaffs2_scan_chunk':
yaffs_yaffs2.c:949:6: warning: variable 'result' set but not used
[-Wunused-but-set-variable]
yaffs_yaffs2.c: In function 'yaffs2_scan_backwards':
yaffs_yaffs2.c:1352:6: warning: variable 'deleted' set but not used
[-Wunused-but-set-variable]

Signed-off-by: Anatolij Gustschin <agust@denx.de>
Cc: Charles Manning <cdhmanning@gmail.com>
Tested-by: Albert ARIBAUD <albert.u.boot@aribaud.net>

fs/yaffs2/yaffs_guts.c

@@ -321,9 +321,8 @@ static int yaffs_check_chunk_erased(struct yaffs_dev *dev, int nand_chunk)
 	int retval = YAFFS_OK;
 	u8 *data = yaffs_get_temp_buffer(dev);
 	struct yaffs_ext_tags tags;
-	int result;
 
-	result = yaffs_rd_chunk_tags_nand(dev, nand_chunk, data, &tags);
+	yaffs_rd_chunk_tags_nand(dev, nand_chunk, data, &tags);
 
 	if (tags.ecc_result > YAFFS_ECC_RESULT_NO_ERROR)
 		retval = YAFFS_FAIL;
@@ -349,9 +348,8 @@ static int yaffs_verify_chunk_written(struct yaffs_dev *dev,
 	int retval = YAFFS_OK;
 	struct yaffs_ext_tags temp_tags;
 	u8 *buffer = yaffs_get_temp_buffer(dev);
-	int result;
 
-	result = yaffs_rd_chunk_tags_nand(dev, nand_chunk, buffer, &temp_tags);
+	yaffs_rd_chunk_tags_nand(dev, nand_chunk, buffer, &temp_tags);
 	if (memcmp(buffer, data, dev->data_bytes_per_chunk) ||
 	    temp_tags.obj_id != tags->obj_id ||
 	    temp_tags.chunk_id != tags->chunk_id ||
@@ -1485,7 +1483,6 @@ static struct yaffs_cache *yaffs_grab_chunk_cache(struct yaffs_dev *dev)
 	struct yaffs_obj *the_obj;
 	int usage;
 	int i;
-	int pushout;
 
 	if (dev->param.n_caches < 1)
 		return NULL;
@@ -1506,7 +1503,6 @@ static struct yaffs_cache *yaffs_grab_chunk_cache(struct yaffs_dev *dev)
 		the_obj = dev->cache[0].object;
 		usage = -1;
 		cache = NULL;
-		pushout = -1;
 
 		for (i = 0; i < dev->param.n_caches; i++) {
 			if (dev->cache[i].object &&
@@ -1516,7 +1512,6 @@ static struct yaffs_cache *yaffs_grab_chunk_cache(struct yaffs_dev *dev)
 				usage = dev->cache[i].last_use;
 				the_obj = dev->cache[i].object;
 				cache = &dev->cache[i];
-				pushout = i;
 			}
 		}
 
@@ -3176,8 +3171,6 @@ static void yaffs_check_obj_details_loaded(struct yaffs_obj *in)
 	struct yaffs_obj_hdr *oh;
 	struct yaffs_dev *dev;
 	struct yaffs_ext_tags tags;
-	int result;
-	int alloc_failed = 0;
 
 	if (!in || !in->lazy_loaded || in->hdr_chunk < 1)
 		return;
@@ -3186,7 +3179,7 @@ static void yaffs_check_obj_details_loaded(struct yaffs_obj *in)
 	in->lazy_loaded = 0;
 	buf = yaffs_get_temp_buffer(dev);
 
-	result = yaffs_rd_chunk_tags_nand(dev, in->hdr_chunk, buf, &tags);
+	yaffs_rd_chunk_tags_nand(dev, in->hdr_chunk, buf, &tags);
 	oh = (struct yaffs_obj_hdr *)buf;
 
 	in->yst_mode = oh->yst_mode;
@@ -3196,8 +3189,6 @@ static void yaffs_check_obj_details_loaded(struct yaffs_obj *in)
 	if (in->variant_type == YAFFS_OBJECT_TYPE_SYMLINK) {
 		in->variant.symlink_variant.alias =
 		    yaffs_clone_str(oh->alias);
-		if (!in->variant.symlink_variant.alias)
-			alloc_failed = 1;	/* Not returned */
 	}
 	yaffs_release_temp_buffer(dev, buf);
 }
@@ -3285,7 +3276,6 @@ int yaffs_update_oh(struct yaffs_obj *in, const YCHAR *name, int force,
 	struct yaffs_dev *dev = in->my_dev;
 	int prev_chunk_id;
 	int ret_val = 0;
-	int result = 0;
 	int new_chunk_id;
 	struct yaffs_ext_tags new_tags;
 	struct yaffs_ext_tags old_tags;
@@ -3309,8 +3299,8 @@ int yaffs_update_oh(struct yaffs_obj *in, const YCHAR *name, int force,
 	prev_chunk_id = in->hdr_chunk;
 
 	if (prev_chunk_id > 0) {
-		result = yaffs_rd_chunk_tags_nand(dev, prev_chunk_id,
-						  buffer, &old_tags);
+		yaffs_rd_chunk_tags_nand(dev, prev_chunk_id,
+					  buffer, &old_tags);
 
 		yaffs_verify_oh(in, oh, &old_tags, 0);
 		memcpy(old_name, oh->name, sizeof(oh->name));
@@ -4444,7 +4434,6 @@ int yaffs_get_obj_name(struct yaffs_obj *obj, YCHAR *name, int buffer_size)
 	} else if (obj->short_name[0]) {
 		yaffs_strcpy(name, obj->short_name);
 	} else if (obj->hdr_chunk > 0) {
-		int result;
 		u8 *buffer = yaffs_get_temp_buffer(obj->my_dev);
 
 		struct yaffs_obj_hdr *oh = (struct yaffs_obj_hdr *)buffer;
@@ -4452,9 +4441,9 @@ int yaffs_get_obj_name(struct yaffs_obj *obj, YCHAR *name, int buffer_size)
 		memset(buffer, 0, obj->my_dev->data_bytes_per_chunk);
 
 		if (obj->hdr_chunk > 0) {
-			result = yaffs_rd_chunk_tags_nand(obj->my_dev,
-							  obj->hdr_chunk,
-							  buffer, NULL);
+			yaffs_rd_chunk_tags_nand(obj->my_dev,
+						 obj->hdr_chunk,
+						 buffer, NULL);
 		}
 		yaffs_load_name_from_oh(obj->my_dev, name, oh->name,
 					buffer_size);

fs/yaffs2/yaffs_summary.c

@@ -191,10 +191,7 @@ int yaffs_summary_read(struct yaffs_dev *dev,
 	struct yaffs_summary_header hdr;
 	struct yaffs_block_info *bi = yaffs_get_block_info(dev, blk);
 	int sum_bytes_per_chunk = dev->data_bytes_per_chunk - sizeof(hdr);
-	int sum_tags_bytes;
 
-	sum_tags_bytes = sizeof(struct yaffs_summary_tags) *
-				dev->chunks_per_summary;
 	buffer = yaffs_get_temp_buffer(dev);
 	n_bytes = sizeof(struct yaffs_summary_tags) * dev->chunks_per_summary;
 	chunk_in_block = dev->chunks_per_summary;

fs/yaffs2/yaffs_verify.c

@@ -224,7 +224,6 @@ void yaffs_verify_file(struct yaffs_obj *obj)
 {
 	u32 x;
 	int required_depth;
-	int actual_depth;
 	int last_chunk;
 	u32 offset_in_chunk;
 	u32 the_chunk;
@@ -256,8 +255,6 @@ void yaffs_verify_file(struct yaffs_obj *obj)
 		required_depth++;
 	}
 
-	actual_depth = obj->variant.file_variant.top_level;
-
 	/* Check that the chunks in the tnode tree are all correct.
 	 * We do this by scanning through the tnode tree and
 	 * checking the tags for every chunk match.

fs/yaffs2/yaffs_yaffs1.c

@@ -23,7 +23,6 @@ int yaffs1_scan(struct yaffs_dev *dev)
 {
 	struct yaffs_ext_tags tags;
 	int blk;
-	int result;
 	int chunk;
 	int c;
 	int deleted;
@@ -95,8 +94,7 @@ int yaffs1_scan(struct yaffs_dev *dev)
 			/* Read the tags and decide what to do */
 			chunk = blk * dev->param.chunks_per_block + c;
 
-			result = yaffs_rd_chunk_tags_nand(dev, chunk, NULL,
-							  &tags);
+			yaffs_rd_chunk_tags_nand(dev, chunk, NULL, &tags);
 
 			/* Let's have a good look at this chunk... */
 
@@ -181,9 +179,8 @@ int yaffs1_scan(struct yaffs_dev *dev)
 				yaffs_set_chunk_bit(dev, blk, c);
 				bi->pages_in_use++;
 
-				result = yaffs_rd_chunk_tags_nand(dev, chunk,
-								  chunk_data,
-								  NULL);
+				yaffs_rd_chunk_tags_nand(dev, chunk,
+							 chunk_data, NULL);
 
 				oh = (struct yaffs_obj_hdr *)chunk_data;
 

fs/yaffs2/yaffs_yaffs2.c

@@ -946,7 +946,6 @@ static inline int yaffs2_scan_chunk(struct yaffs_dev *dev,
 	int is_shrink;
 	int is_unlinked;
 	struct yaffs_ext_tags tags;
-	int result;
 	int alloc_failed = 0;
 	int chunk = blk * dev->param.chunks_per_block + chunk_in_block;
 	struct yaffs_file_var *file_var;
@@ -954,12 +953,12 @@ static inline int yaffs2_scan_chunk(struct yaffs_dev *dev,
 	struct yaffs_symlink_var *sl_var;
 
 	if (summary_available) {
-		result = yaffs_summary_fetch(dev, &tags, chunk_in_block);
+		yaffs_summary_fetch(dev, &tags, chunk_in_block);
 		tags.seq_number = bi->seq_number;
 	}
 
 	if (!summary_available || tags.obj_id == 0) {
-		result = yaffs_rd_chunk_tags_nand(dev, chunk, NULL, &tags);
+		yaffs_rd_chunk_tags_nand(dev, chunk, NULL, &tags);
 		dev->tags_used++;
 	} else {
 		dev->summary_used++;
@@ -1114,10 +1113,7 @@ static inline int yaffs2_scan_chunk(struct yaffs_dev *dev,
 			 * invalid data until needed.
 			 */
 
-			result = yaffs_rd_chunk_tags_nand(dev,
-						  chunk,
-						  chunk_data,
-						  NULL);
+			yaffs_rd_chunk_tags_nand(dev, chunk, chunk_data, NULL);
 
 			oh = (struct yaffs_obj_hdr *)chunk_data;
 
@@ -1349,7 +1345,6 @@ int yaffs2_scan_backwards(struct yaffs_dev *dev)
 	int n_to_scan = 0;
 	enum yaffs_block_state state;
 	int c;
-	int deleted;
 	LIST_HEAD(hard_list);
 	struct yaffs_block_info *bi;
 	u32 seq_number;
@@ -1467,7 +1462,6 @@ int yaffs2_scan_backwards(struct yaffs_dev *dev)
 		/* get the block to scan in the correct order */
 		blk = block_index[block_iter].block;
 		bi = yaffs_get_block_info(dev, blk);
-		deleted = 0;
 
 		summary_available = yaffs_summary_read(dev, dev->sum_tags, blk);