erofs: introduce physical cluster slab pools

[linux-2.6-microblaze.git] / fs / erofs / zdata.h

diff --git a/fs/erofs/zdata.h b/fs/erofs/zdata.h
index b503b35..942ee69 100644 (file)
--- a/fs/erofs/zdata.h
+++ b/fs/erofs/zdata.h
@@ -10,6 +10,7 @@
 #include "internal.h"
 #include "zpvec.h"
 
+#define Z_EROFS_PCLUSTER_MAX_PAGES     (Z_EROFS_PCLUSTER_MAX_SIZE / PAGE_SIZE)
 #define Z_EROFS_NR_INLINE_PAGEVECS      3
 
 /*
@@ -59,16 +60,17 @@ struct z_erofs_pcluster {
        /* A: point to next chained pcluster or TAILs */
        z_erofs_next_pcluster_t next;
 
-       /* A: compressed pages (including multi-usage pages) */
-       struct page *compressed_pages[Z_EROFS_CLUSTER_MAX_PAGES];
-
        /* A: lower limit of decompressed length and if full length or not */
        unsigned int length;
 
+       /* I: physical cluster size in pages */
+       unsigned short pclusterpages;
+
        /* I: compression algorithm format */
        unsigned char algorithmformat;
-       /* I: bit shift of physical cluster size */
-       unsigned char clusterbits;
+
+       /* A: compressed pages (can be cached or inplaced pages) */
+       struct page *compressed_pages[];
 };
 
 #define z_erofs_primarycollection(pcluster) (&(pcluster)->primary_collection)
@@ -82,8 +84,6 @@ struct z_erofs_pcluster {
 
 #define Z_EROFS_PCLUSTER_NIL            (NULL)
 
-#define Z_EROFS_WORKGROUP_SIZE  sizeof(struct z_erofs_pcluster)
-
 struct z_erofs_decompressqueue {
        struct super_block *sb;
        atomic_t pending_bios;