btrfs: concentrate all tree block parentness check parameters into one structure

[sfrench/cifs-2.6.git] / fs / btrfs / compression.h

diff --git a/fs/btrfs/compression.h b/fs/btrfs/compression.h
index 1aa02903de69700088cc9e0d9113e18305eae3fc..6209d40a1e08e31a0adf5c5d4c7007d2e417e14f 100644 (file)
--- a/fs/btrfs/compression.h
+++ b/fs/btrfs/compression.h
@@ -6,6 +6,7 @@
 #ifndef BTRFS_COMPRESSION_H
 #define BTRFS_COMPRESSION_H
 
+#include <linux/blk_types.h>
 #include <linux/sizes.h>
 
 struct btrfs_inode;
@@ -77,7 +78,7 @@ static inline unsigned int btrfs_compress_level(unsigned int type_level)
        return ((type_level & 0xF0) >> 4);
 }
 
-void __init btrfs_init_compress(void);
+int __init btrfs_init_compress(void);
 void __cold btrfs_exit_compress(void);
 
 int btrfs_compress_pages(unsigned int type_level, struct address_space *mapping,
@@ -85,7 +86,7 @@ int btrfs_compress_pages(unsigned int type_level, struct address_space *mapping,
                         unsigned long *out_pages,
                         unsigned long *total_in,
                         unsigned long *total_out);
-int btrfs_decompress(int type, unsigned char *data_in, struct page *dest_page,
+int btrfs_decompress(int type, const u8 *data_in, struct page *dest_page,
                     unsigned long start_byte, size_t srclen, size_t destlen);
 int btrfs_decompress_buf2page(const char *buf, u32 buf_len,
                              struct compressed_bio *cb, u32 decompressed);
@@ -149,7 +150,7 @@ int zlib_compress_pages(struct list_head *ws, struct address_space *mapping,
                u64 start, struct page **pages, unsigned long *out_pages,
                unsigned long *total_in, unsigned long *total_out);
 int zlib_decompress_bio(struct list_head *ws, struct compressed_bio *cb);
-int zlib_decompress(struct list_head *ws, unsigned char *data_in,
+int zlib_decompress(struct list_head *ws, const u8 *data_in,
                struct page *dest_page, unsigned long start_byte, size_t srclen,
                size_t destlen);
 struct list_head *zlib_alloc_workspace(unsigned int level);
@@ -160,7 +161,7 @@ int lzo_compress_pages(struct list_head *ws, struct address_space *mapping,
                u64 start, struct page **pages, unsigned long *out_pages,
                unsigned long *total_in, unsigned long *total_out);
 int lzo_decompress_bio(struct list_head *ws, struct compressed_bio *cb);
-int lzo_decompress(struct list_head *ws, unsigned char *data_in,
+int lzo_decompress(struct list_head *ws, const u8 *data_in,
                struct page *dest_page, unsigned long start_byte, size_t srclen,
                size_t destlen);
 struct list_head *lzo_alloc_workspace(unsigned int level);
@@ -170,7 +171,7 @@ int zstd_compress_pages(struct list_head *ws, struct address_space *mapping,
                u64 start, struct page **pages, unsigned long *out_pages,
                unsigned long *total_in, unsigned long *total_out);
 int zstd_decompress_bio(struct list_head *ws, struct compressed_bio *cb);
-int zstd_decompress(struct list_head *ws, unsigned char *data_in,
+int zstd_decompress(struct list_head *ws, const u8 *data_in,
                struct page *dest_page, unsigned long start_byte, size_t srclen,
                size_t destlen);
 void zstd_init_workspace_manager(void);