On Fri, 9 Oct 2020, ira.weiny@intel.com wrote:
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: Nicolas Pitre nico@fluxnic.net Signed-off-by: Ira Weiny ira.weiny@intel.com
Acked-by: Nicolas Pitre nico@fluxnic.net
fs/cramfs/inode.c | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-)
diff --git a/fs/cramfs/inode.c b/fs/cramfs/inode.c index 912308600d39..003c014a42ed 100644 --- a/fs/cramfs/inode.c +++ b/fs/cramfs/inode.c @@ -247,8 +247,8 @@ static void *cramfs_blkdev_read(struct super_block *sb, unsigned int offset, struct page *page = pages[i]; if (page) {
memcpy(data, kmap(page), PAGE_SIZE);kunmap(page);
memcpy(data, kmap_thread(page), PAGE_SIZE);kunmap_thread(page); put_page(page);@@ -826,7 +826,7 @@ static int cramfs_readpage(struct file *file, struct page *page) maxblock = (inode->i_size + PAGE_SIZE - 1) >> PAGE_SHIFT; bytes_filled = 0;
- pgdata = kmap(page);
- pgdata = kmap_thread(page);
if (page->index < maxblock) { struct super_block *sb = inode->i_sb; @@ -914,13 +914,13 @@ static int cramfs_readpage(struct file *file, struct page *page) memset(pgdata + bytes_filled, 0, PAGE_SIZE - bytes_filled); flush_dcache_page(page);
- kunmap(page);
- kunmap_thread(page); SetPageUptodate(page); unlock_page(page); return 0;
err:
- kunmap(page);
- kunmap_thread(page); ClearPageUptodate(page); SetPageError(page); unlock_page(page);
-- 2.28.0.rc0.12.gb6a658bd00c9