Btrfs: Fix compile warnings on 32 bit machines

Simple casting here and there to fix things up.
Signed-off-by: Chris Mason <chris.mason@oracle.com>

fs/btrfs/compression.c

@@ -174,7 +174,8 @@ static noinline int end_compressed_writeback(struct inode *inode, u64 start,
 
 	while(nr_pages > 0) {
 		ret = find_get_pages_contig(inode->i_mapping, index,
-				     min(nr_pages, ARRAY_SIZE(pages)), pages);
+				     min_t(unsigned long,
+				     nr_pages, ARRAY_SIZE(pages)), pages);
 		if (ret == 0) {
 			nr_pages -= 1;
 			index += 1;

fs/btrfs/extent_io.c

@@ -1157,7 +1157,8 @@ static noinline int __unlock_for_delalloc(struct inode *inode,
 
 	while(nr_pages > 0) {
 		ret = find_get_pages_contig(inode->i_mapping, index,
-				     min(nr_pages, ARRAY_SIZE(pages)), pages);
+				     min_t(unsigned long, nr_pages,
+				     ARRAY_SIZE(pages)), pages);
 		for (i = 0; i < ret; i++) {
 			if (pages[i] != locked_page)
 				unlock_page(pages[i]);
@@ -1192,7 +1193,8 @@ static noinline int lock_delalloc_pages(struct inode *inode,
 	nrpages = end_index - index + 1;
 	while(nrpages > 0) {
 		ret = find_get_pages_contig(inode->i_mapping, index,
-				     min(nrpages, ARRAY_SIZE(pages)), pages);
+				     min_t(unsigned long,
+				     nrpages, ARRAY_SIZE(pages)), pages);
 		if (ret == 0) {
 			ret = -EAGAIN;
 			goto done;
@@ -1346,7 +1348,8 @@ int extent_clear_unlock_delalloc(struct inode *inode,
 
 	while(nr_pages > 0) {
 		ret = find_get_pages_contig(inode->i_mapping, index,
-				     min(nr_pages, ARRAY_SIZE(pages)), pages);
+				     min_t(unsigned long,
+				     nr_pages, ARRAY_SIZE(pages)), pages);
 		for (i = 0; i < ret; i++) {
 			if (pages[i] == locked_page) {
 				page_cache_release(pages[i]);
@@ -1896,7 +1899,7 @@ static int submit_extent_page(int rw, struct extent_io_tree *tree,
 	int contig = 0;
 	int this_compressed = bio_flags & EXTENT_BIO_COMPRESSED;
 	int old_compressed = prev_bio_flags & EXTENT_BIO_COMPRESSED;
-	size_t page_size = min(size, PAGE_CACHE_SIZE);
+	size_t page_size = min_t(size_t, size, PAGE_CACHE_SIZE);
 
 	if (bio_ret && *bio_ret) {
 		bio = *bio_ret;

fs/btrfs/inode.c

@@ -184,7 +184,7 @@ static int noinline insert_inline_extent(struct btrfs_trans_handle *trans,
 		int i = 0;
 		while(compressed_size > 0) {
 			cpage = compressed_pages[i];
-			cur_size = min(compressed_size,
+			cur_size = min_t(unsigned long, compressed_size,
 				       PAGE_CACHE_SIZE);
 
 			kaddr = kmap(cpage);
@@ -3812,7 +3812,7 @@ static noinline int uncompress_inline(struct btrfs_path *path,
 
 	read_extent_buffer(leaf, tmp, ptr, inline_size);
 
-	max_size = min(PAGE_CACHE_SIZE, max_size);
+	max_size = min_t(unsigned long, PAGE_CACHE_SIZE, max_size);
 	ret = btrfs_zlib_decompress(tmp, page, extent_offset,
 				    inline_size, max_size);
 	if (ret) {

fs/btrfs/zlib.c

@@ -370,7 +370,7 @@ int btrfs_zlib_decompress_biovec(struct page **pages_in,
 
 	data_in = kmap(pages_in[page_in_index]);
 	workspace->inf_strm.next_in = data_in;
-	workspace->inf_strm.avail_in = min(srclen, PAGE_CACHE_SIZE);
+	workspace->inf_strm.avail_in = min_t(size_t, srclen, PAGE_CACHE_SIZE);
 	workspace->inf_strm.total_in = 0;
 
 	workspace->inf_strm.total_out = 0;