[PATCH RFC PKS/PMEM 28/58] fs/cachefiles: Utilize new kmap_thread()

[ira.weiny@xxxxxxxxx]

From: Ira Weiny <ira.weiny@xxxxxxxxx>

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: David Howells <dhowells@xxxxxxxxxx>
Signed-off-by: Ira Weiny <ira.weiny@xxxxxxxxx>
---
 fs/cachefiles/rdwr.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/fs/cachefiles/rdwr.c b/fs/cachefiles/rdwr.c
index 3080cda9e824..2468e5c067ba 100644
--- a/fs/cachefiles/rdwr.c
+++ b/fs/cachefiles/rdwr.c
@@ -936,9 +936,9 @@ int cachefiles_write_page(struct fscache_storage *op, 
struct page *page)
                }
        }
 
-       data = kmap(page);
+       data = kmap_thread(page);
        ret = kernel_write(file, data, len, &pos);
-       kunmap(page);
+       kunmap_thread(page);
        fput(file);
        if (ret != len)
                goto error_eio;
-- 
2.28.0.rc0.12.gb6a658bd00c9