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Subject[PATCH RFC PKS/PMEM 18/58] fs/hfs: Utilize new kmap_thread()
Date
From: Ira Weiny <ira.weiny@intel.com>

The kmap() calls in this FS are localized to a single thread. To avoid
the over head of global PKRS updates use the new kmap_thread() call.

Signed-off-by: Ira Weiny <ira.weiny@intel.com>
---
fs/hfs/bnode.c | 14 +++++++-------
fs/hfs/btree.c | 20 ++++++++++----------
2 files changed, 17 insertions(+), 17 deletions(-)

diff --git a/fs/hfs/bnode.c b/fs/hfs/bnode.c
index b63a4df7327b..8b4d02576405 100644
--- a/fs/hfs/bnode.c
+++ b/fs/hfs/bnode.c
@@ -23,8 +23,8 @@ void hfs_bnode_read(struct hfs_bnode *node, void *buf,
off += node->page_offset;
page = node->page[0];

- memcpy(buf, kmap(page) + off, len);
- kunmap(page);
+ memcpy(buf, kmap_thread(page) + off, len);
+ kunmap_thread(page);
}

u16 hfs_bnode_read_u16(struct hfs_bnode *node, int off)
@@ -108,9 +108,9 @@ void hfs_bnode_copy(struct hfs_bnode *dst_node, int dst,
src_page = src_node->page[0];
dst_page = dst_node->page[0];

- memcpy(kmap(dst_page) + dst, kmap(src_page) + src, len);
- kunmap(src_page);
- kunmap(dst_page);
+ memcpy(kmap_thread(dst_page) + dst, kmap_thread(src_page) + src, len);
+ kunmap_thread(src_page);
+ kunmap_thread(dst_page);
set_page_dirty(dst_page);
}

@@ -125,9 +125,9 @@ void hfs_bnode_move(struct hfs_bnode *node, int dst, int src, int len)
src += node->page_offset;
dst += node->page_offset;
page = node->page[0];
- ptr = kmap(page);
+ ptr = kmap_thread(page);
memmove(ptr + dst, ptr + src, len);
- kunmap(page);
+ kunmap_thread(page);
set_page_dirty(page);
}

diff --git a/fs/hfs/btree.c b/fs/hfs/btree.c
index 19017d296173..bd4a6d35e361 100644
--- a/fs/hfs/btree.c
+++ b/fs/hfs/btree.c
@@ -80,7 +80,7 @@ struct hfs_btree *hfs_btree_open(struct super_block *sb, u32 id, btree_keycmp ke
goto free_inode;

/* Load the header */
- head = (struct hfs_btree_header_rec *)(kmap(page) + sizeof(struct hfs_bnode_desc));
+ head = (struct hfs_btree_header_rec *)(kmap_thread(page) + sizeof(struct hfs_bnode_desc));
tree->root = be32_to_cpu(head->root);
tree->leaf_count = be32_to_cpu(head->leaf_count);
tree->leaf_head = be32_to_cpu(head->leaf_head);
@@ -119,7 +119,7 @@ struct hfs_btree *hfs_btree_open(struct super_block *sb, u32 id, btree_keycmp ke
tree->node_size_shift = ffs(size) - 1;
tree->pages_per_bnode = (tree->node_size + PAGE_SIZE - 1) >> PAGE_SHIFT;

- kunmap(page);
+ kunmap_thread(page);
put_page(page);
return tree;

@@ -268,7 +268,7 @@ struct hfs_bnode *hfs_bmap_alloc(struct hfs_btree *tree)

off += node->page_offset;
pagep = node->page + (off >> PAGE_SHIFT);
- data = kmap(*pagep);
+ data = kmap_thread(*pagep);
off &= ~PAGE_MASK;
idx = 0;

@@ -281,7 +281,7 @@ struct hfs_bnode *hfs_bmap_alloc(struct hfs_btree *tree)
idx += i;
data[off] |= m;
set_page_dirty(*pagep);
- kunmap(*pagep);
+ kunmap_thread(*pagep);
tree->free_nodes--;
mark_inode_dirty(tree->inode);
hfs_bnode_put(node);
@@ -290,14 +290,14 @@ struct hfs_bnode *hfs_bmap_alloc(struct hfs_btree *tree)
}
}
if (++off >= PAGE_SIZE) {
- kunmap(*pagep);
- data = kmap(*++pagep);
+ kunmap_thread(*pagep);
+ data = kmap_thread(*++pagep);
off = 0;
}
idx += 8;
len--;
}
- kunmap(*pagep);
+ kunmap_thread(*pagep);
nidx = node->next;
if (!nidx) {
printk(KERN_DEBUG "create new bmap node...\n");
@@ -313,7 +313,7 @@ struct hfs_bnode *hfs_bmap_alloc(struct hfs_btree *tree)
off = off16;
off += node->page_offset;
pagep = node->page + (off >> PAGE_SHIFT);
- data = kmap(*pagep);
+ data = kmap_thread(*pagep);
off &= ~PAGE_MASK;
}
}
@@ -360,7 +360,7 @@ void hfs_bmap_free(struct hfs_bnode *node)
}
off += node->page_offset + nidx / 8;
page = node->page[off >> PAGE_SHIFT];
- data = kmap(page);
+ data = kmap_thread(page);
off &= ~PAGE_MASK;
m = 1 << (~nidx & 7);
byte = data[off];
@@ -373,7 +373,7 @@ void hfs_bmap_free(struct hfs_bnode *node)
}
data[off] = byte & ~m;
set_page_dirty(page);
- kunmap(page);
+ kunmap_thread(page);
hfs_bnode_put(node);
tree->free_nodes++;
mark_inode_dirty(tree->inode);
--
2.28.0.rc0.12.gb6a658bd00c9
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