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Date:	Thu, 10 Jul 2008 11:44:16 -0500
From:	Jon Tollefson <kniht@...ux.vnet.ibm.com>
To:	Alexey Dobriyan <adobriyan@...il.com>
CC:	Andrew Morton <akpm@...ux-foundation.org>, penberg@...helsinki.fi,
	mpm@...enic.com, linux-mm@...ck.org, linux-kernel@...r.kernel.org,
	cl@...ux-foundation.org
Subject: Re: SL*B: drop kmem cache argument from constructor

Alexey Dobriyan wrote:
> Kmem cache passed to constructor is only needed for constructors that are
> themselves multiplexeres. Nobody uses this "feature", nor does anybody uses
> passed kmem cache in non-trivial way, so pass only pointer to object.
>
> Non-trivial places are:
> 	arch/powerpc/mm/init_64.c
> 	arch/powerpc/mm/hugetlbpage.c
>   
...<snip>...
> --- a/arch/powerpc/mm/hugetlbpage.c
> +++ b/arch/powerpc/mm/hugetlbpage.c
> @@ -595,9 +595,9 @@ static int __init hugepage_setup_sz(char *str)
>  }
>  __setup("hugepagesz=", hugepage_setup_sz);
>
> -static void zero_ctor(struct kmem_cache *cache, void *addr)
> +static void zero_ctor(void *addr)
>  {
> -	memset(addr, 0, kmem_cache_size(cache));
> +	memset(addr, 0, HUGEPTE_TABLE_SIZE);
>   
This isn't going to work with the multiple huge page size support.  The
HUGEPTE_TABLE_SIZE macro now takes a parameter with of the mmu psize
index to indicate the size of page.

Jon

>  }
>
>  static int __init hugetlbpage_init(void)
> --- a/arch/powerpc/mm/init_64.c
> +++ b/arch/powerpc/mm/init_64.c
> @@ -136,9 +136,14 @@ static int __init setup_kcore(void)
>  module_init(setup_kcore);
>  #endif
>
> -static void zero_ctor(struct kmem_cache *cache, void *addr)
> +static void pgd_ctor(void *addr)
>  {
> -	memset(addr, 0, kmem_cache_size(cache));
> +	memset(addr, 0, PGD_TABLE_SIZE);
> +}
> +
> +static void pmd_ctor(void *addr)
> +{
> +	memset(addr, 0, PMD_TABLE_SIZE);
>  }
>
>  static const unsigned int pgtable_cache_size[2] = {
> @@ -163,19 +168,8 @@ struct kmem_cache *pgtable_cache[ARRAY_SIZE(pgtable_cache_size)];
>
>  void pgtable_cache_init(void)
>  {
> -	int i;
> -
> -	for (i = 0; i < ARRAY_SIZE(pgtable_cache_size); i++) {
> -		int size = pgtable_cache_size[i];
> -		const char *name = pgtable_cache_name[i];
> -
> -		pr_debug("Allocating page table cache %s (#%d) "
> -			"for size: %08x...\n", name, i, size);
> -		pgtable_cache[i] = kmem_cache_create(name,
> -						     size, size,
> -						     SLAB_PANIC,
> -						     zero_ctor);
> -	}
> +	pgtable_cache[0] = kmem_cache_create(pgtable_cache_name[0], PGD_TABLE_SIZE, PGD_TABLE_SIZE, SLAB_PANIC, pgd_ctor);
> +	pgtable_cache[1] = kmem_cache_create(pgtable_cache_name[1], PMD_TABLE_SIZE, PMD_TABLE_SIZE, SLAB_PANIC, pmd_ctor);
>  }
>
>  #ifdef CONFIG_SPARSEMEM_VMEMMAP
> --- a/arch/powerpc/platforms/cell/spufs/inode.c
> +++ b/arch/powerpc/platforms/cell/spufs/inode.c
> @@ -69,7 +69,7 @@ spufs_destroy_inode(struct inode *inode)
>  }
>
>  static void
> -spufs_init_once(struct kmem_cache *cachep, void *p)
> +spufs_init_once(void *p)
>  {
>  	struct spufs_inode_info *ei = p;
>
> --- a/arch/sh/mm/pmb.c
> +++ b/arch/sh/mm/pmb.c
> @@ -293,7 +293,7 @@ void pmb_unmap(unsigned long addr)
>  	} while (pmbe);
>  }
>
> -static void pmb_cache_ctor(struct kmem_cache *cachep, void *pmb)
> +static void pmb_cache_ctor(void *pmb)
>  {
>  	struct pmb_entry *pmbe = pmb;
>
> --- a/arch/xtensa/mm/init.c
> +++ b/arch/xtensa/mm/init.c
> @@ -309,7 +309,7 @@ void show_mem(void)
>
>  struct kmem_cache *pgtable_cache __read_mostly;
>
> -static void pgd_ctor(struct kmem_cache *cache, void* addr)
> +static void pgd_ctor(void* addr)
>  {
>  	pte_t* ptep = (pte_t*)addr;
>  	int i;
> --- a/drivers/usb/mon/mon_text.c
> +++ b/drivers/usb/mon/mon_text.c
> @@ -87,7 +87,7 @@ struct mon_reader_text {
>
>  static struct dentry *mon_dir;		/* Usually /sys/kernel/debug/usbmon */
>
> -static void mon_text_ctor(struct kmem_cache *, void *);
> +static void mon_text_ctor(void *);
>
>  struct mon_text_ptr {
>  	int cnt, limit;
> @@ -720,7 +720,7 @@ void mon_text_del(struct mon_bus *mbus)
>  /*
>   * Slab interface: constructor.
>   */
> -static void mon_text_ctor(struct kmem_cache *slab, void *mem)
> +static void mon_text_ctor(void *mem)
>  {
>  	/*
>  	 * Nothing to initialize. No, really!
> --- a/fs/adfs/super.c
> +++ b/fs/adfs/super.c
> @@ -249,7 +249,7 @@ static void adfs_destroy_inode(struct inode *inode)
>  	kmem_cache_free(adfs_inode_cachep, ADFS_I(inode));
>  }
>
> -static void init_once(struct kmem_cache *cachep, void *foo)
> +static void init_once(void *foo)
>  {
>  	struct adfs_inode_info *ei = (struct adfs_inode_info *) foo;
>
> --- a/fs/affs/super.c
> +++ b/fs/affs/super.c
> @@ -90,7 +90,7 @@ static void affs_destroy_inode(struct inode *inode)
>  	kmem_cache_free(affs_inode_cachep, AFFS_I(inode));
>  }
>
> -static void init_once(struct kmem_cache *cachep, void *foo)
> +static void init_once(void *foo)
>  {
>  	struct affs_inode_info *ei = (struct affs_inode_info *) foo;
>
> --- a/fs/afs/super.c
> +++ b/fs/afs/super.c
> @@ -27,7 +27,7 @@
>
>  #define AFS_FS_MAGIC 0x6B414653 /* 'kAFS' */
>
> -static void afs_i_init_once(struct kmem_cache *cachep, void *foo);
> +static void afs_i_init_once(void *foo);
>  static int afs_get_sb(struct file_system_type *fs_type,
>  		      int flags, const char *dev_name,
>  		      void *data, struct vfsmount *mnt);
> @@ -449,7 +449,7 @@ static void afs_put_super(struct super_block *sb)
>  /*
>   * initialise an inode cache slab element prior to any use
>   */
> -static void afs_i_init_once(struct kmem_cache *cachep, void *_vnode)
> +static void afs_i_init_once(void *_vnode)
>  {
>  	struct afs_vnode *vnode = _vnode;
>
> --- a/fs/befs/linuxvfs.c
> +++ b/fs/befs/linuxvfs.c
> @@ -289,7 +289,7 @@ befs_destroy_inode(struct inode *inode)
>          kmem_cache_free(befs_inode_cachep, BEFS_I(inode));
>  }
>
> -static void init_once(struct kmem_cache *cachep, void *foo)
> +static void init_once(void *foo)
>  {
>          struct befs_inode_info *bi = (struct befs_inode_info *) foo;
>
> --- a/fs/bfs/inode.c
> +++ b/fs/bfs/inode.c
> @@ -259,7 +259,7 @@ static void bfs_destroy_inode(struct inode *inode)
>  	kmem_cache_free(bfs_inode_cachep, BFS_I(inode));
>  }
>
> -static void init_once(struct kmem_cache *cachep, void *foo)
> +static void init_once(void *foo)
>  {
>  	struct bfs_inode_info *bi = foo;
>
> --- a/fs/block_dev.c
> +++ b/fs/block_dev.c
> @@ -271,7 +271,7 @@ static void bdev_destroy_inode(struct inode *inode)
>  	kmem_cache_free(bdev_cachep, bdi);
>  }
>
> -static void init_once(struct kmem_cache * cachep, void *foo)
> +static void init_once(void *foo)
>  {
>  	struct bdev_inode *ei = (struct bdev_inode *) foo;
>  	struct block_device *bdev = &ei->bdev;
> --- a/fs/buffer.c
> +++ b/fs/buffer.c
> @@ -3259,7 +3259,7 @@ int bh_submit_read(struct buffer_head *bh)
>  EXPORT_SYMBOL(bh_submit_read);
>
>  static void
> -init_buffer_head(struct kmem_cache *cachep, void *data)
> +init_buffer_head(void *data)
>  {
>  	struct buffer_head *bh = data;
>
> --- a/fs/cifs/cifsfs.c
> +++ b/fs/cifs/cifsfs.c
> @@ -766,7 +766,7 @@ const struct file_operations cifs_dir_ops = {
>  };
>
>  static void
> -cifs_init_once(struct kmem_cache *cachep, void *inode)
> +cifs_init_once(void *inode)
>  {
>  	struct cifsInodeInfo *cifsi = inode;
>
> --- a/fs/coda/inode.c
> +++ b/fs/coda/inode.c
> @@ -58,7 +58,7 @@ static void coda_destroy_inode(struct inode *inode)
>  	kmem_cache_free(coda_inode_cachep, ITOC(inode));
>  }
>
> -static void init_once(struct kmem_cache * cachep, void *foo)
> +static void init_once(void *foo)
>  {
>  	struct coda_inode_info *ei = (struct coda_inode_info *) foo;
>
> --- a/fs/ecryptfs/main.c
> +++ b/fs/ecryptfs/main.c
> @@ -605,7 +605,7 @@ static struct file_system_type ecryptfs_fs_type = {
>   * Initializes the ecryptfs_inode_info_cache when it is created
>   */
>  static void
> -inode_info_init_once(struct kmem_cache *cachep, void *vptr)
> +inode_info_init_once(void *vptr)
>  {
>  	struct ecryptfs_inode_info *ei = (struct ecryptfs_inode_info *)vptr;
>
> @@ -616,7 +616,7 @@ static struct ecryptfs_cache_info {
>  	struct kmem_cache **cache;
>  	const char *name;
>  	size_t size;
> -	void (*ctor)(struct kmem_cache *cache, void *obj);
> +	void (*ctor)(void *obj);
>  } ecryptfs_cache_infos[] = {
>  	{
>  		.cache = &ecryptfs_auth_tok_list_item_cache,
> --- a/fs/efs/super.c
> +++ b/fs/efs/super.c
> @@ -70,7 +70,7 @@ static void efs_destroy_inode(struct inode *inode)
>  	kmem_cache_free(efs_inode_cachep, INODE_INFO(inode));
>  }
>
> -static void init_once(struct kmem_cache *cachep, void *foo)
> +static void init_once(void *foo)
>  {
>  	struct efs_inode_info *ei = (struct efs_inode_info *) foo;
>
> --- a/fs/ext2/super.c
> +++ b/fs/ext2/super.c
> @@ -158,7 +158,7 @@ static void ext2_destroy_inode(struct inode *inode)
>  	kmem_cache_free(ext2_inode_cachep, EXT2_I(inode));
>  }
>
> -static void init_once(struct kmem_cache * cachep, void *foo)
> +static void init_once(void *foo)
>  {
>  	struct ext2_inode_info *ei = (struct ext2_inode_info *) foo;
>
> --- a/fs/ext3/super.c
> +++ b/fs/ext3/super.c
> @@ -472,7 +472,7 @@ static void ext3_destroy_inode(struct inode *inode)
>  	kmem_cache_free(ext3_inode_cachep, EXT3_I(inode));
>  }
>
> -static void init_once(struct kmem_cache * cachep, void *foo)
> +static void init_once(void *foo)
>  {
>  	struct ext3_inode_info *ei = (struct ext3_inode_info *) foo;
>
> --- a/fs/ext4/super.c
> +++ b/fs/ext4/super.c
> @@ -587,7 +587,7 @@ static void ext4_destroy_inode(struct inode *inode)
>  	kmem_cache_free(ext4_inode_cachep, EXT4_I(inode));
>  }
>
> -static void init_once(struct kmem_cache *cachep, void *foo)
> +static void init_once(void *foo)
>  {
>  	struct ext4_inode_info *ei = (struct ext4_inode_info *) foo;
>
> --- a/fs/fat/cache.c
> +++ b/fs/fat/cache.c
> @@ -36,7 +36,7 @@ static inline int fat_max_cache(struct inode *inode)
>
>  static struct kmem_cache *fat_cache_cachep;
>
> -static void init_once(struct kmem_cache *cachep, void *foo)
> +static void init_once(void *foo)
>  {
>  	struct fat_cache *cache = (struct fat_cache *)foo;
>
> --- a/fs/fat/inode.c
> +++ b/fs/fat/inode.c
> @@ -496,7 +496,7 @@ static void fat_destroy_inode(struct inode *inode)
>  	kmem_cache_free(fat_inode_cachep, MSDOS_I(inode));
>  }
>
> -static void init_once(struct kmem_cache *cachep, void *foo)
> +static void init_once(void *foo)
>  {
>  	struct msdos_inode_info *ei = (struct msdos_inode_info *)foo;
>
> --- a/fs/fuse/inode.c
> +++ b/fs/fuse/inode.c
> @@ -781,7 +781,7 @@ static inline void unregister_fuseblk(void)
>  }
>  #endif
>
> -static void fuse_inode_init_once(struct kmem_cache *cachep, void *foo)
> +static void fuse_inode_init_once(void *foo)
>  {
>  	struct inode * inode = foo;
>
> --- a/fs/gfs2/main.c
> +++ b/fs/gfs2/main.c
> @@ -24,7 +24,7 @@
>  #include "util.h"
>  #include "glock.h"
>
> -static void gfs2_init_inode_once(struct kmem_cache *cachep, void *foo)
> +static void gfs2_init_inode_once(void *foo)
>  {
>  	struct gfs2_inode *ip = foo;
>
> @@ -33,7 +33,7 @@ static void gfs2_init_inode_once(struct kmem_cache *cachep, void *foo)
>  	ip->i_alloc = NULL;
>  }
>
> -static void gfs2_init_glock_once(struct kmem_cache *cachep, void *foo)
> +static void gfs2_init_glock_once(void *foo)
>  {
>  	struct gfs2_glock *gl = foo;
>
> --- a/fs/hfs/super.c
> +++ b/fs/hfs/super.c
> @@ -432,7 +432,7 @@ static struct file_system_type hfs_fs_type = {
>  	.fs_flags	= FS_REQUIRES_DEV,
>  };
>
> -static void hfs_init_once(struct kmem_cache *cachep, void *p)
> +static void hfs_init_once(void *p)
>  {
>  	struct hfs_inode_info *i = p;
>
> --- a/fs/hfsplus/super.c
> +++ b/fs/hfsplus/super.c
> @@ -485,7 +485,7 @@ static struct file_system_type hfsplus_fs_type = {
>  	.fs_flags	= FS_REQUIRES_DEV,
>  };
>
> -static void hfsplus_init_once(struct kmem_cache *cachep, void *p)
> +static void hfsplus_init_once(void *p)
>  {
>  	struct hfsplus_inode_info *i = p;
>
> --- a/fs/hpfs/super.c
> +++ b/fs/hpfs/super.c
> @@ -173,7 +173,7 @@ static void hpfs_destroy_inode(struct inode *inode)
>  	kmem_cache_free(hpfs_inode_cachep, hpfs_i(inode));
>  }
>
> -static void init_once(struct kmem_cache *cachep, void *foo)
> +static void init_once(void *foo)
>  {
>  	struct hpfs_inode_info *ei = (struct hpfs_inode_info *) foo;
>
> --- a/fs/hugetlbfs/inode.c
> +++ b/fs/hugetlbfs/inode.c
> @@ -696,7 +696,7 @@ static const struct address_space_operations hugetlbfs_aops = {
>  };
>
>
> -static void init_once(struct kmem_cache *cachep, void *foo)
> +static void init_once(void *foo)
>  {
>  	struct hugetlbfs_inode_info *ei = (struct hugetlbfs_inode_info *)foo;
>
> --- a/fs/inode.c
> +++ b/fs/inode.c
> @@ -224,7 +224,7 @@ void inode_init_once(struct inode *inode)
>
>  EXPORT_SYMBOL(inode_init_once);
>
> -static void init_once(struct kmem_cache * cachep, void *foo)
> +static void init_once(void *foo)
>  {
>  	struct inode * inode = (struct inode *) foo;
>
> --- a/fs/isofs/inode.c
> +++ b/fs/isofs/inode.c
> @@ -73,7 +73,7 @@ static void isofs_destroy_inode(struct inode *inode)
>  	kmem_cache_free(isofs_inode_cachep, ISOFS_I(inode));
>  }
>
> -static void init_once(struct kmem_cache *cachep, void *foo)
> +static void init_once(void *foo)
>  {
>  	struct iso_inode_info *ei = foo;
>
> --- a/fs/jffs2/super.c
> +++ b/fs/jffs2/super.c
> @@ -44,7 +44,7 @@ static void jffs2_destroy_inode(struct inode *inode)
>  	kmem_cache_free(jffs2_inode_cachep, JFFS2_INODE_INFO(inode));
>  }
>
> -static void jffs2_i_init_once(struct kmem_cache *cachep, void *foo)
> +static void jffs2_i_init_once(void *foo)
>  {
>  	struct jffs2_inode_info *f = foo;
>
> --- a/fs/jfs/jfs_metapage.c
> +++ b/fs/jfs/jfs_metapage.c
> @@ -180,7 +180,7 @@ static inline void remove_metapage(struct page *page, struct metapage *mp)
>
>  #endif
>
> -static void init_once(struct kmem_cache *cachep, void *foo)
> +static void init_once(void *foo)
>  {
>  	struct metapage *mp = (struct metapage *)foo;
>
> --- a/fs/jfs/super.c
> +++ b/fs/jfs/super.c
> @@ -760,7 +760,7 @@ static struct file_system_type jfs_fs_type = {
>  	.fs_flags	= FS_REQUIRES_DEV,
>  };
>
> -static void init_once(struct kmem_cache *cachep, void *foo)
> +static void init_once(void *foo)
>  {
>  	struct jfs_inode_info *jfs_ip = (struct jfs_inode_info *) foo;
>
> --- a/fs/locks.c
> +++ b/fs/locks.c
> @@ -201,7 +201,7 @@ EXPORT_SYMBOL(locks_init_lock);
>   * Initialises the fields of the file lock which are invariant for
>   * free file_locks.
>   */
> -static void init_once(struct kmem_cache *cache, void *foo)
> +static void init_once(void *foo)
>  {
>  	struct file_lock *lock = (struct file_lock *) foo;
>
> --- a/fs/minix/inode.c
> +++ b/fs/minix/inode.c
> @@ -68,7 +68,7 @@ static void minix_destroy_inode(struct inode *inode)
>  	kmem_cache_free(minix_inode_cachep, minix_i(inode));
>  }
>
> -static void init_once(struct kmem_cache * cachep, void *foo)
> +static void init_once(void *foo)
>  {
>  	struct minix_inode_info *ei = (struct minix_inode_info *) foo;
>
> --- a/fs/ncpfs/inode.c
> +++ b/fs/ncpfs/inode.c
> @@ -64,7 +64,7 @@ static void ncp_destroy_inode(struct inode *inode)
>  	kmem_cache_free(ncp_inode_cachep, NCP_FINFO(inode));
>  }
>
> -static void init_once(struct kmem_cache *cachep, void *foo)
> +static void init_once(void *foo)
>  {
>  	struct ncp_inode_info *ei = (struct ncp_inode_info *) foo;
>
> --- a/fs/nfs/inode.c
> +++ b/fs/nfs/inode.c
> @@ -1193,7 +1193,7 @@ static inline void nfs4_init_once(struct nfs_inode *nfsi)
>  #endif
>  }
>
> -static void init_once(struct kmem_cache * cachep, void *foo)
> +static void init_once(void *foo)
>  {
>  	struct nfs_inode *nfsi = (struct nfs_inode *) foo;
>
> --- a/fs/ntfs/super.c
> +++ b/fs/ntfs/super.c
> @@ -3080,7 +3080,7 @@ struct kmem_cache *ntfs_inode_cache;
>  struct kmem_cache *ntfs_big_inode_cache;
>
>  /* Init once constructor for the inode slab cache. */
> -static void ntfs_big_inode_init_once(struct kmem_cache *cachep, void *foo)
> +static void ntfs_big_inode_init_once(void *foo)
>  {
>  	ntfs_inode *ni = (ntfs_inode *)foo;
>
> --- a/fs/ocfs2/dlm/dlmfs.c
> +++ b/fs/ocfs2/dlm/dlmfs.c
> @@ -267,8 +267,7 @@ static ssize_t dlmfs_file_write(struct file *filp,
>  	return writelen;
>  }
>
> -static void dlmfs_init_once(struct kmem_cache *cachep,
> -			    void *foo)
> +static void dlmfs_init_once(void *foo)
>  {
>  	struct dlmfs_inode_private *ip =
>  		(struct dlmfs_inode_private *) foo;
> --- a/fs/ocfs2/super.c
> +++ b/fs/ocfs2/super.c
> @@ -1118,7 +1118,7 @@ bail:
>  	return status;
>  }
>
> -static void ocfs2_inode_init_once(struct kmem_cache *cachep, void *data)
> +static void ocfs2_inode_init_once(void *data)
>  {
>  	struct ocfs2_inode_info *oi = data;
>
> --- a/fs/openpromfs/inode.c
> +++ b/fs/openpromfs/inode.c
> @@ -430,7 +430,7 @@ static struct file_system_type openprom_fs_type = {
>  	.kill_sb	= kill_anon_super,
>  };
>
> -static void op_inode_init_once(struct kmem_cache * cachep, void *data)
> +static void op_inode_init_once(void *data)
>  {
>  	struct op_inode_info *oi = (struct op_inode_info *) data;
>
> --- a/fs/proc/inode.c
> +++ b/fs/proc/inode.c
> @@ -94,7 +94,7 @@ static void proc_destroy_inode(struct inode *inode)
>  	kmem_cache_free(proc_inode_cachep, PROC_I(inode));
>  }
>
> -static void init_once(struct kmem_cache * cachep, void *foo)
> +static void init_once(void *foo)
>  {
>  	struct proc_inode *ei = (struct proc_inode *) foo;
>
> --- a/fs/qnx4/inode.c
> +++ b/fs/qnx4/inode.c
> @@ -553,7 +553,7 @@ static void qnx4_destroy_inode(struct inode *inode)
>  	kmem_cache_free(qnx4_inode_cachep, qnx4_i(inode));
>  }
>
> -static void init_once(struct kmem_cache *cachep, void *foo)
> +static void init_once(void *foo)
>  {
>  	struct qnx4_inode_info *ei = (struct qnx4_inode_info *) foo;
>
> --- a/fs/reiserfs/super.c
> +++ b/fs/reiserfs/super.c
> @@ -520,7 +520,7 @@ static void reiserfs_destroy_inode(struct inode *inode)
>  	kmem_cache_free(reiserfs_inode_cachep, REISERFS_I(inode));
>  }
>
> -static void init_once(struct kmem_cache * cachep, void *foo)
> +static void init_once(void *foo)
>  {
>  	struct reiserfs_inode_info *ei = (struct reiserfs_inode_info *)foo;
>
> --- a/fs/romfs/inode.c
> +++ b/fs/romfs/inode.c
> @@ -577,7 +577,7 @@ static void romfs_destroy_inode(struct inode *inode)
>  	kmem_cache_free(romfs_inode_cachep, ROMFS_I(inode));
>  }
>
> -static void init_once(struct kmem_cache *cachep, void *foo)
> +static void init_once(void *foo)
>  {
>  	struct romfs_inode_info *ei = foo;
>
> --- a/fs/smbfs/inode.c
> +++ b/fs/smbfs/inode.c
> @@ -67,7 +67,7 @@ static void smb_destroy_inode(struct inode *inode)
>  	kmem_cache_free(smb_inode_cachep, SMB_I(inode));
>  }
>
> -static void init_once(struct kmem_cache *cachep, void *foo)
> +static void init_once(void *foo)
>  {
>  	struct smb_inode_info *ei = (struct smb_inode_info *) foo;
>
> --- a/fs/sysv/inode.c
> +++ b/fs/sysv/inode.c
> @@ -326,7 +326,7 @@ static void sysv_destroy_inode(struct inode *inode)
>  	kmem_cache_free(sysv_inode_cachep, SYSV_I(inode));
>  }
>
> -static void init_once(struct kmem_cache *cachep, void *p)
> +static void init_once(void *p)
>  {
>  	struct sysv_inode_info *si = (struct sysv_inode_info *)p;
>
> --- a/fs/udf/super.c
> +++ b/fs/udf/super.c
> @@ -148,7 +148,7 @@ static void udf_destroy_inode(struct inode *inode)
>  	kmem_cache_free(udf_inode_cachep, UDF_I(inode));
>  }
>
> -static void init_once(struct kmem_cache *cachep, void *foo)
> +static void init_once(void *foo)
>  {
>  	struct udf_inode_info *ei = (struct udf_inode_info *)foo;
>
> --- a/fs/ufs/super.c
> +++ b/fs/ufs/super.c
> @@ -1301,7 +1301,7 @@ static void ufs_destroy_inode(struct inode *inode)
>  	kmem_cache_free(ufs_inode_cachep, UFS_I(inode));
>  }
>
> -static void init_once(struct kmem_cache * cachep, void *foo)
> +static void init_once(void *foo)
>  {
>  	struct ufs_inode_info *ei = (struct ufs_inode_info *) foo;
>
> --- a/fs/xfs/linux-2.6/kmem.h
> +++ b/fs/xfs/linux-2.6/kmem.h
> @@ -79,7 +79,7 @@ kmem_zone_init(int size, char *zone_name)
>
>  static inline kmem_zone_t *
>  kmem_zone_init_flags(int size, char *zone_name, unsigned long flags,
> -		     void (*construct)(kmem_zone_t *, void *))
> +		     void (*construct)(void *))
>  {
>  	return kmem_cache_create(zone_name, size, 0, flags, construct);
>  }
> --- a/fs/xfs/linux-2.6/xfs_super.c
> +++ b/fs/xfs/linux-2.6/xfs_super.c
> @@ -843,7 +843,6 @@ xfs_fs_destroy_inode(
>
>  STATIC void
>  xfs_fs_inode_init_once(
> -	kmem_zone_t		*zonep,
>  	void			*vnode)
>  {
>  	inode_init_once(vn_to_inode((bhv_vnode_t *)vnode));
> --- a/include/linux/slab.h
> +++ b/include/linux/slab.h
> @@ -58,7 +58,7 @@ int slab_is_available(void);
>
>  struct kmem_cache *kmem_cache_create(const char *, size_t, size_t,
>  			unsigned long,
> -			void (*)(struct kmem_cache *, void *));
> +			void (*)(void *));
>  void kmem_cache_destroy(struct kmem_cache *);
>  int kmem_cache_shrink(struct kmem_cache *);
>  void kmem_cache_free(struct kmem_cache *, void *);
> --- a/include/linux/slub_def.h
> +++ b/include/linux/slub_def.h
> @@ -85,7 +85,7 @@ struct kmem_cache {
>  	struct kmem_cache_order_objects min;
>  	gfp_t allocflags;	/* gfp flags to use on each alloc */
>  	int refcount;		/* Refcount for slab cache destroy */
> -	void (*ctor)(struct kmem_cache *, void *);
> +	void (*ctor)(void *);
>  	int inuse;		/* Offset to metadata */
>  	int align;		/* Alignment */
>  	const char *name;	/* Name (only for display!) */
> --- a/ipc/mqueue.c
> +++ b/ipc/mqueue.c
> @@ -207,7 +207,7 @@ static int mqueue_get_sb(struct file_system_type *fs_type,
>  	return get_sb_single(fs_type, flags, data, mqueue_fill_super, mnt);
>  }
>
> -static void init_once(struct kmem_cache *cachep, void *foo)
> +static void init_once(void *foo)
>  {
>  	struct mqueue_inode_info *p = (struct mqueue_inode_info *) foo;
>
> --- a/kernel/fork.c
> +++ b/kernel/fork.c
> @@ -1403,7 +1403,7 @@ long do_fork(unsigned long clone_flags,
>  #define ARCH_MIN_MMSTRUCT_ALIGN 0
>  #endif
>
> -static void sighand_ctor(struct kmem_cache *cachep, void *data)
> +static void sighand_ctor(void *data)
>  {
>  	struct sighand_struct *sighand = data;
>
> --- a/lib/idr.c
> +++ b/lib/idr.c
> @@ -580,7 +580,7 @@ void *idr_replace(struct idr *idp, void *ptr, int id)
>  }
>  EXPORT_SYMBOL(idr_replace);
>
> -static void idr_cache_ctor(struct kmem_cache *idr_layer_cache, void *idr_layer)
> +static void idr_cache_ctor(void *idr_layer)
>  {
>  	memset(idr_layer, 0, sizeof(struct idr_layer));
>  }
> --- a/lib/radix-tree.c
> +++ b/lib/radix-tree.c
> @@ -1051,7 +1051,7 @@ int radix_tree_tagged(struct radix_tree_root *root, unsigned int tag)
>  EXPORT_SYMBOL(radix_tree_tagged);
>
>  static void
> -radix_tree_node_ctor(struct kmem_cache *cachep, void *node)
> +radix_tree_node_ctor(void *node)
>  {
>  	memset(node, 0, sizeof(struct radix_tree_node));
>  }
> --- a/mm/rmap.c
> +++ b/mm/rmap.c
> @@ -138,7 +138,7 @@ void anon_vma_unlink(struct vm_area_struct *vma)
>  		anon_vma_free(anon_vma);
>  }
>
> -static void anon_vma_ctor(struct kmem_cache *cachep, void *data)
> +static void anon_vma_ctor(void *data)
>  {
>  	struct anon_vma *anon_vma = data;
>
> --- a/mm/shmem.c
> +++ b/mm/shmem.c
> @@ -2330,7 +2330,7 @@ static void shmem_destroy_inode(struct inode *inode)
>  	kmem_cache_free(shmem_inode_cachep, SHMEM_I(inode));
>  }
>
> -static void init_once(struct kmem_cache *cachep, void *foo)
> +static void init_once(void *foo)
>  {
>  	struct shmem_inode_info *p = (struct shmem_inode_info *) foo;
>
> --- a/mm/slab.c
> +++ b/mm/slab.c
> @@ -406,7 +406,7 @@ struct kmem_cache {
>  	unsigned int dflags;		/* dynamic flags */
>
>  	/* constructor func */
> -	void (*ctor)(struct kmem_cache *, void *);
> +	void (*ctor)(void *);
>
>  /* 5) cache creation/removal */
>  	const char *name;
> @@ -2145,8 +2145,7 @@ static int __init_refok setup_cpu_cache(struct kmem_cache *cachep)
>   */
>  struct kmem_cache *
>  kmem_cache_create (const char *name, size_t size, size_t align,
> -	unsigned long flags,
> -	void (*ctor)(struct kmem_cache *, void *))
> +	unsigned long flags, void (*ctor)(void *))
>  {
>  	size_t left_over, slab_size, ralign;
>  	struct kmem_cache *cachep = NULL, *pc;
> @@ -2677,7 +2676,7 @@ static void cache_init_objs(struct kmem_cache *cachep,
>  					 cachep->buffer_size / PAGE_SIZE, 0);
>  #else
>  		if (cachep->ctor)
> -			cachep->ctor(cachep, objp);
> +			cachep->ctor(objp);
>  #endif
>  		slab_bufctl(slabp)[i] = i + 1;
>  	}
> --- a/mm/slob.c
> +++ b/mm/slob.c
> @@ -525,12 +525,11 @@ struct kmem_cache {
>  	unsigned int size, align;
>  	unsigned long flags;
>  	const char *name;
> -	void (*ctor)(struct kmem_cache *, void *);
> +	void (*ctor)(void *);
>  };
>
>  struct kmem_cache *kmem_cache_create(const char *name, size_t size,
> -	size_t align, unsigned long flags,
> -	void (*ctor)(struct kmem_cache *, void *))
> +	size_t align, unsigned long flags, void (*ctor)(void *))
>  {
>  	struct kmem_cache *c;
>
> @@ -575,7 +574,7 @@ void *kmem_cache_alloc_node(struct kmem_cache *c, gfp_t flags, int node)
>  		b = slob_new_page(flags, get_order(c->size), node);
>
>  	if (c->ctor)
> -		c->ctor(c, b);
> +		c->ctor(b);
>
>  	return b;
>  }
> --- a/mm/slub.c
> +++ b/mm/slub.c
> @@ -1045,7 +1045,7 @@ __setup("slub_debug", setup_slub_debug);
>
>  static unsigned long kmem_cache_flags(unsigned long objsize,
>  	unsigned long flags, const char *name,
> -	void (*ctor)(struct kmem_cache *, void *))
> +	void (*ctor)(void *))
>  {
>  	/*
>  	 * Enable debugging if selected on the kernel commandline.
> @@ -1073,7 +1073,7 @@ static inline int check_object(struct kmem_cache *s, struct page *page,
>  static inline void add_full(struct kmem_cache_node *n, struct page *page) {}
>  static inline unsigned long kmem_cache_flags(unsigned long objsize,
>  	unsigned long flags, const char *name,
> -	void (*ctor)(struct kmem_cache *, void *))
> +	void (*ctor)(void *))
>  {
>  	return flags;
>  }
> @@ -1136,7 +1136,7 @@ static void setup_object(struct kmem_cache *s, struct page *page,
>  {
>  	setup_object_debug(s, page, object);
>  	if (unlikely(s->ctor))
> -		s->ctor(s, object);
> +		s->ctor(object);
>  }
>
>  static struct page *new_slab(struct kmem_cache *s, gfp_t flags, int node)
> @@ -2324,7 +2324,7 @@ static int calculate_sizes(struct kmem_cache *s, int forced_order)
>  static int kmem_cache_open(struct kmem_cache *s, gfp_t gfpflags,
>  		const char *name, size_t size,
>  		size_t align, unsigned long flags,
> -		void (*ctor)(struct kmem_cache *, void *))
> +		void (*ctor)(void *))
>  {
>  	memset(s, 0, kmem_size);
>  	s->name = name;
> @@ -3079,7 +3079,7 @@ static int slab_unmergeable(struct kmem_cache *s)
>
>  static struct kmem_cache *find_mergeable(size_t size,
>  		size_t align, unsigned long flags, const char *name,
> -		void (*ctor)(struct kmem_cache *, void *))
> +		void (*ctor)(void *))
>  {
>  	struct kmem_cache *s;
>
> @@ -3119,8 +3119,7 @@ static struct kmem_cache *find_mergeable(size_t size,
>  }
>
>  struct kmem_cache *kmem_cache_create(const char *name, size_t size,
> -		size_t align, unsigned long flags,
> -		void (*ctor)(struct kmem_cache *, void *))
> +		size_t align, unsigned long flags, void (*ctor)(void *))
>  {
>  	struct kmem_cache *s;
>
> --- a/net/socket.c
> +++ b/net/socket.c
> @@ -262,7 +262,7 @@ static void sock_destroy_inode(struct inode *inode)
>  			container_of(inode, struct socket_alloc, vfs_inode));
>  }
>
> -static void init_once(struct kmem_cache *cachep, void *foo)
> +static void init_once(void *foo)
>  {
>  	struct socket_alloc *ei = (struct socket_alloc *)foo;
>
> --- a/net/sunrpc/rpc_pipe.c
> +++ b/net/sunrpc/rpc_pipe.c
> @@ -897,7 +897,7 @@ static struct file_system_type rpc_pipe_fs_type = {
>  };
>
>  static void
> -init_once(struct kmem_cache * cachep, void *foo)
> +init_once(void *foo)
>  {
>  	struct rpc_inode *rpci = (struct rpc_inode *) foo;
>
>
> --
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> see: http://www.linux-mm.org/ .
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