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mm: move shmem prototypes to shmem_fs.h

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Before adding any more global entry points into shmem.c, gather such
prototypes into shmem_fs.h.  Remove mm's own declarations from swap.h,
but for now leave the ones in mm.h: because shmem_file_setup() and
shmem_zero_setup() are called from various places, and we should not
force other subsystems to update immediately.

Signed-off-by: Hugh Dickins <hughd@google.com>
Cc: Christoph Hellwig <hch@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Hugh Dickins 2011-06-27 16:18:02 -07:00 committed by Linus Torvalds
parent 5b8ba10198
commit 072441e21d
4 changed files with 19 additions and 11 deletions
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17
include/linux/shmem_fs.h
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@ -5,6 +5,13 @@
#include <linux/mempolicy.h>
#include <linux/percpu_counter.h>
struct page;
struct file;
struct inode;
struct super_block;
struct user_struct;
struct vm_area_struct;
/* inode in-kernel data */
#define SHMEM_NR_DIRECT 16
@ -45,7 +52,17 @@ static inline struct shmem_inode_info *SHMEM_I(struct inode *inode)
return container_of(inode, struct shmem_inode_info, vfs_inode);
}
/*
* Functions in mm/shmem.c called directly from elsewhere:
*/
extern int init_tmpfs(void);
extern int shmem_fill_super(struct super_block *sb, void *data, int silent);
extern struct file *shmem_file_setup(const char *name,
loff_t size, unsigned long flags);
extern int shmem_zero_setup(struct vm_area_struct *);
extern int shmem_lock(struct file *file, int lock, struct user_struct *user);
extern int shmem_unuse(swp_entry_t entry, struct page *page);
extern void mem_cgroup_get_shmem_target(struct inode *inode, pgoff_t pgoff,
struct page **pagep, swp_entry_t *ent);
#endif

10
include/linux/swap.h
View File

@ -300,16 +300,6 @@ static inline void scan_unevictable_unregister_node(struct node *node)
extern int kswapd_run(int nid);
extern void kswapd_stop(int nid);
#ifdef CONFIG_MMU
/* linux/mm/shmem.c */
extern int shmem_unuse(swp_entry_t entry, struct page *page);
#endif /* CONFIG_MMU */
#ifdef CONFIG_CGROUP_MEM_RES_CTLR
extern void mem_cgroup_get_shmem_target(struct inode *inode, pgoff_t pgoff,
struct page **pagep, swp_entry_t *ent);
#endif
#ifdef CONFIG_SWAP
/* linux/mm/page_io.c */
extern int swap_readpage(struct page *);

1
mm/memcontrol.c
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@ -35,6 +35,7 @@
#include <linux/limits.h>
#include <linux/mutex.h>
#include <linux/rbtree.h>
#include <linux/shmem_fs.h>
#include <linux/slab.h>
#include <linux/swap.h>
#include <linux/swapops.h>

2
mm/swapfile.c
View File

@ -14,7 +14,7 @@
#include <linux/vmalloc.h>
#include <linux/pagemap.h>
#include <linux/namei.h>
#include <linux/shm.h>
#include <linux/shmem_fs.h>
#include <linux/blkdev.h>
#include <linux/random.h>
#include <linux/writeback.h>