Fix warnings in yaffs

Sorry if this is already fixed somewhere - I could not find it.

This fixes the warnings show below.

yaffs_tagscompat.c: In function 'yaffs_TagsCompatabilityReadChunkWithTagsFromNAND':
yaffs_tagscompat.c:151: warning: dereferencing pointer 'tu' does break strict-aliasing rules
yaffs_tagscompat.c:150: warning: dereferencing pointer 'tu' does break strict-aliasing rules
yaffs_tagscompat.c:149: warning: dereferencing pointer 'tu' does break strict-aliasing rules
yaffs_tagscompat.c:148: warning: dereferencing pointer 'tu' does break strict-aliasing rules
yaffs_tagscompat.c:147: warning: dereferencing pointer 'tu' does break strict-aliasing rules
yaffs_tagscompat.c:146: warning: dereferencing pointer 'tu' does break strict-aliasing rules
yaffs_tagscompat.c:145: warning: dereferencing pointer 'tu' does break strict-aliasing rules
yaffs_tagscompat.c:144: warning: dereferencing pointer 'tu' does break strict-aliasing rules
yaffs_tagscompat.c:141: note: initialized from here

Signed-off-by: Simon Glass <sjg@chromium.org>

fs/yaffs2/yaffs_tagscompat.c

@@ -136,9 +136,8 @@ static void yaffs_LoadTagsIntoSpare(yaffs_Spare * sparePtr,
 }
 
 static void yaffs_GetTagsFromSpare(yaffs_Device * dev, yaffs_Spare * sparePtr,
-				   yaffs_Tags * tagsPtr)
+				   yaffs_TagsUnion *tu)
 {
-	yaffs_TagsUnion *tu = (yaffs_TagsUnion *) tagsPtr;
 	int result;
 
 	tu->asBytes[0] = sparePtr->tagByte0;
@@ -150,7 +149,7 @@ static void yaffs_GetTagsFromSpare(yaffs_Device * dev, yaffs_Spare * sparePtr,
 	tu->asBytes[6] = sparePtr->tagByte6;
 	tu->asBytes[7] = sparePtr->tagByte7;
 
-	result = yaffs_CheckECCOnTags(tagsPtr);
+	result = yaffs_CheckECCOnTags(&tu->asTags);
 	if (result > 0) {
 		dev->tagsEccFixed++;
 	} else if (result < 0) {
@@ -437,7 +436,7 @@ int yaffs_TagsCompatabilityReadChunkWithTagsFromNAND(yaffs_Device * dev,
 {
 
 	yaffs_Spare spare;
-	yaffs_Tags tags;
+	yaffs_TagsUnion tags;
 	yaffs_ECCResult eccResult;
 
 	static yaffs_Spare spareFF;
@@ -467,10 +466,10 @@ int yaffs_TagsCompatabilityReadChunkWithTagsFromNAND(yaffs_Device * dev,
 			if (eTags->chunkUsed) {
 				yaffs_GetTagsFromSpare(dev, &spare, &tags);
 
-				eTags->objectId = tags.objectId;
-				eTags->chunkId = tags.chunkId;
-				eTags->byteCount = tags.byteCount;
-				eTags->serialNumber = tags.serialNumber;
+				eTags->objectId = tags.asTags.objectId;
+				eTags->chunkId = tags.asTags.chunkId;
+				eTags->byteCount = tags.asTags.byteCount;
+				eTags->serialNumber = tags.asTags.serialNumber;
 			}
 		}