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Subject[PATCH RFC PKS/PMEM 31/58] fs/vboxsf: 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.

Cc: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Ira Weiny <ira.weiny@intel.com>
---
fs/vboxsf/file.c | 12 ++++++------
1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/fs/vboxsf/file.c b/fs/vboxsf/file.c
index c4ab5996d97a..d9c7e6b7b4cc 100644
--- a/fs/vboxsf/file.c
+++ b/fs/vboxsf/file.c
@@ -216,7 +216,7 @@ static int vboxsf_readpage(struct file *file, struct page *page)
u8 *buf;
int err;

- buf = kmap(page);
+ buf = kmap_thread(page);

err = vboxsf_read(sf_handle->root, sf_handle->handle, off, &nread, buf);
if (err == 0) {
@@ -227,7 +227,7 @@ static int vboxsf_readpage(struct file *file, struct page *page)
SetPageError(page);
}

- kunmap(page);
+ kunmap_thread(page);
unlock_page(page);
return err;
}
@@ -268,10 +268,10 @@ static int vboxsf_writepage(struct page *page, struct writeback_control *wbc)
if (!sf_handle)
return -EBADF;

- buf = kmap(page);
+ buf = kmap_thread(page);
err = vboxsf_write(sf_handle->root, sf_handle->handle,
off, &nwrite, buf);
- kunmap(page);
+ kunmap_thread(page);

kref_put(&sf_handle->refcount, vboxsf_handle_release);

@@ -302,10 +302,10 @@ static int vboxsf_write_end(struct file *file, struct address_space *mapping,
if (!PageUptodate(page) && copied < len)
zero_user(page, from + copied, len - copied);

- buf = kmap(page);
+ buf = kmap_thread(page);
err = vboxsf_write(sf_handle->root, sf_handle->handle,
pos, &nwritten, buf + from);
- kunmap(page);
+ kunmap_thread(page);

if (err) {
nwritten = 0;
--
2.28.0.rc0.12.gb6a658bd00c9
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