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

Commit Message

Ira Weiny Oct. 9, 2020, 7:50 p.m. UTC

From: Ira Weiny <[e-mail]>

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 <[e-mail]>
Signed-off-by: Ira Weiny <[e-mail]>
---
 fs/cachefiles/rdwr.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

Patch

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;