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mm: redefine address_space.assoc_mapping

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Overhaul struct address_space.assoc_mapping renaming it to
address_space.private_data and its type is redefined to void*.  By this
approach we consistently name the .private_* elements from struct
address_space as well as allow extended usage for address_space
association with other data structures through ->private_data.

Also, all users of old ->assoc_mapping element are converted to reflect
its new name and type change (->private_data).

Signed-off-by: Rafael Aquini <aquini@redhat.com>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: "Michael S. Tsirkin" <mst@redhat.com>
Cc: Rik van Riel <riel@redhat.com>
Cc: Mel Gorman <mel@csn.ul.ie>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Cc: Minchan Kim <minchan@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Rafael Aquini 2012-12-11 16:02:35 -08:00 committed by Linus Torvalds
parent 78bd52097d
commit 252aa6f5be
5 changed files with 10 additions and 10 deletions
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12
fs/buffer.c
View file

@ -555,7 +555,7 @@ void emergency_thaw_all(void)
*/
int sync_mapping_buffers(struct address_space *mapping)
{
struct address_space *buffer_mapping = mapping->assoc_mapping;
struct address_space *buffer_mapping = mapping->private_data;
if (buffer_mapping == NULL || list_empty(&mapping->private_list))
return 0;
@ -588,10 +588,10 @@ void mark_buffer_dirty_inode(struct buffer_head *bh, struct inode *inode)
struct address_space *buffer_mapping = bh->b_page->mapping;
mark_buffer_dirty(bh);
if (!mapping->assoc_mapping) {
mapping->assoc_mapping = buffer_mapping;
if (!mapping->private_data) {
mapping->private_data = buffer_mapping;
} else {
BUG_ON(mapping->assoc_mapping != buffer_mapping);
BUG_ON(mapping->private_data != buffer_mapping);
}
if (!bh->b_assoc_map) {
spin_lock(&buffer_mapping->private_lock);
@ -788,7 +788,7 @@ void invalidate_inode_buffers(struct inode *inode)
if (inode_has_buffers(inode)) {
struct address_space *mapping = &inode->i_data;
struct list_head *list = &mapping->private_list;
struct address_space *buffer_mapping = mapping->assoc_mapping;
struct address_space *buffer_mapping = mapping->private_data;
spin_lock(&buffer_mapping->private_lock);
while (!list_empty(list))
@ -811,7 +811,7 @@ int remove_inode_buffers(struct inode *inode)
if (inode_has_buffers(inode)) {
struct address_space *mapping = &inode->i_data;
struct list_head *list = &mapping->private_list;
struct address_space *buffer_mapping = mapping->assoc_mapping;
struct address_space *buffer_mapping = mapping->private_data;
spin_lock(&buffer_mapping->private_lock);
while (!list_empty(list)) {

2
fs/gfs2/glock.c
View file

@ -768,7 +768,7 @@ int gfs2_glock_get(struct gfs2_sbd *sdp, u64 number,
mapping->host = s->s_bdev->bd_inode;
mapping->flags = 0;
mapping_set_gfp_mask(mapping, GFP_NOFS);
mapping->assoc_mapping = NULL;
mapping->private_data = NULL;
mapping->backing_dev_info = s->s_bdi;
mapping->writeback_index = 0;
}

2
fs/inode.c
View file

@ -165,7 +165,7 @@ int inode_init_always(struct super_block *sb, struct inode *inode)
mapping->host = inode;
mapping->flags = 0;
mapping_set_gfp_mask(mapping, GFP_HIGHUSER_MOVABLE);
mapping->assoc_mapping = NULL;
mapping->private_data = NULL;
mapping->backing_dev_info = &default_backing_dev_info;
mapping->writeback_index = 0;

2
fs/nilfs2/page.c
View file

@ -431,7 +431,7 @@ void nilfs_mapping_init(struct address_space *mapping, struct inode *inode,
mapping->host = inode;
mapping->flags = 0;
mapping_set_gfp_mask(mapping, GFP_NOFS);
mapping->assoc_mapping = NULL;
mapping->private_data = NULL;
mapping->backing_dev_info = bdi;
mapping->a_ops = &empty_aops;
}

2
include/linux/fs.h
View file

@ -418,7 +418,7 @@ struct address_space {
struct backing_dev_info *backing_dev_info; /* device readahead, etc */
spinlock_t private_lock; /* for use by the address_space */
struct list_head private_list; /* ditto */
struct address_space *assoc_mapping; /* ditto */
void *private_data; /* ditto */
} __attribute__((aligned(sizeof(long))));
/*
* On most architectures that alignment is already the case; but