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.
Cc: Jeff Dike jdike@addtoit.com Cc: Richard Weinberger richard@nod.at Cc: Anton Ivanov anton.ivanov@cambridgegreys.com Signed-off-by: Ira Weiny ira.weiny@intel.com --- fs/hostfs/hostfs_kern.c | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-)
diff --git a/fs/hostfs/hostfs_kern.c b/fs/hostfs/hostfs_kern.c index c070c0d8e3e9..608efd0f83cb 100644 --- a/fs/hostfs/hostfs_kern.c +++ b/fs/hostfs/hostfs_kern.c @@ -409,7 +409,7 @@ static int hostfs_writepage(struct page *page, struct writeback_control *wbc) if (page->index >= end_index) count = inode->i_size & (PAGE_SIZE-1);
- buffer = kmap(page); + buffer = kmap_thread(page);
err = write_file(HOSTFS_I(inode)->fd, &base, buffer, count); if (err != count) { @@ -425,7 +425,7 @@ static int hostfs_writepage(struct page *page, struct writeback_control *wbc) err = 0;
out: - kunmap(page); + kunmap_thread(page);
unlock_page(page); return err; @@ -437,7 +437,7 @@ static int hostfs_readpage(struct file *file, struct page *page) loff_t start = page_offset(page); int bytes_read, ret = 0;
- buffer = kmap(page); + buffer = kmap_thread(page); bytes_read = read_file(FILE_HOSTFS_I(file)->fd, &start, buffer, PAGE_SIZE); if (bytes_read < 0) { @@ -454,7 +454,7 @@ static int hostfs_readpage(struct file *file, struct page *page)
out: flush_dcache_page(page); - kunmap(page); + kunmap_thread(page); unlock_page(page); return ret; } @@ -480,9 +480,9 @@ static int hostfs_write_end(struct file *file, struct address_space *mapping, unsigned from = pos & (PAGE_SIZE - 1); int err;
- buffer = kmap(page); + buffer = kmap_thread(page); err = write_file(FILE_HOSTFS_I(file)->fd, &pos, buffer + from, copied); - kunmap(page); + kunmap_thread(page);
if (!PageUptodate(page) && err == PAGE_SIZE) SetPageUptodate(page);