Squashfs: factor out remaining zlib dependencies into separate wrapper file

Move zlib buffer init/destroy code into separate wrapper file.  Also
make zlib z_stream field a void * removing the need to include zlib.h
for most files.

Signed-off-by: Phillip Lougher <phillip@lougher.demon.co.uk>

1 files changed, 5 insertions, 9 deletions

diff --git a/fs/squashfs/super.c b/fs/squashfs/super.c
index 6c197ef53add..b9f8c6a92d6a 100644
--- a/fs/squashfs/super.c
+++ b/fs/squashfs/super.c
@@ -35,7 +35,6 @@
 #include <linux/pagemap.h>
 #include <linux/init.h>
 #include <linux/module.h>
-#include <linux/zlib.h>
 #include <linux/magic.h>
 
 #include "squashfs_fs.h"
@@ -87,12 +86,9 @@ static int squashfs_fill_super(struct super_block *sb, void *data, int silent)
         }
         msblk = sb->s_fs_info;
 
-        msblk->stream.workspace = kmalloc(zlib_inflate_workspacesize(),
-                GFP_KERNEL);
-        if (msblk->stream.workspace == NULL) {
-                ERROR("Failed to allocate zlib workspace\n");
+        msblk->stream = squashfs_zlib_init();
+        if (msblk->stream == NULL)
                 goto failure;
-        }
 
         sblk = kzalloc(sizeof(*sblk), GFP_KERNEL);
         if (sblk == NULL) {
@@ -292,17 +288,17 @@ failed_mount:
         squashfs_cache_delete(msblk->block_cache);
         squashfs_cache_delete(msblk->fragment_cache);
         squashfs_cache_delete(msblk->read_page);
+        squashfs_zlib_free(msblk->stream);
         kfree(msblk->inode_lookup_table);
         kfree(msblk->fragment_index);
         kfree(msblk->id_table);
-        kfree(msblk->stream.workspace);
         kfree(sb->s_fs_info);
         sb->s_fs_info = NULL;
         kfree(sblk);
         return err;
 
 failure:
-        kfree(msblk->stream.workspace);
+        squashfs_zlib_free(msblk->stream);
         kfree(sb->s_fs_info);
         sb->s_fs_info = NULL;
         return -ENOMEM;
@@ -346,10 +342,10 @@ static void squashfs_put_super(struct super_block *sb)
                 squashfs_cache_delete(sbi->block_cache);
                 squashfs_cache_delete(sbi->fragment_cache);
                 squashfs_cache_delete(sbi->read_page);
+                squashfs_zlib_free(sbi->stream);
                 kfree(sbi->id_table);
                 kfree(sbi->fragment_index);
                 kfree(sbi->meta_index);
-                kfree(sbi->stream.workspace);
                 kfree(sb->s_fs_info);
                 sb->s_fs_info = NULL;
         }