[PATCH RFC PKS/PMEM 27/58] fs/ubifs: 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: Richard Weinberger <richard@xxxxxx>
Signed-off-by: Ira Weiny <ira.weiny@xxxxxxxxx>
---
 fs/ubifs/file.c | 16 ++++++++--------
 1 file changed, 8 insertions(+), 8 deletions(-)

diff --git a/fs/ubifs/file.c b/fs/ubifs/file.c
index b77d1637bbbc..a3537447a885 100644
--- a/fs/ubifs/file.c
+++ b/fs/ubifs/file.c
@@ -111,7 +111,7 @@ static int do_readpage(struct page *page)
        ubifs_assert(c, !PageChecked(page));
        ubifs_assert(c, !PagePrivate(page));
 
-       addr = kmap(page);
+       addr = kmap_thread(page);
 
        block = page->index << UBIFS_BLOCKS_PER_PAGE_SHIFT;
        beyond = (i_size + UBIFS_BLOCK_SIZE - 1) >> UBIFS_BLOCK_SHIFT;
@@ -174,7 +174,7 @@ static int do_readpage(struct page *page)
        SetPageUptodate(page);
        ClearPageError(page);
        flush_dcache_page(page);
-       kunmap(page);
+       kunmap_thread(page);
        return 0;
 
 error:
@@ -182,7 +182,7 @@ static int do_readpage(struct page *page)
        ClearPageUptodate(page);
        SetPageError(page);
        flush_dcache_page(page);
-       kunmap(page);
+       kunmap_thread(page);
        return err;
 }
 
@@ -616,7 +616,7 @@ static int populate_page(struct ubifs_info *c, struct page 
*page,
        dbg_gen("ino %lu, pg %lu, i_size %lld, flags %#lx",
                inode->i_ino, page->index, i_size, page->flags);
 
-       addr = zaddr = kmap(page);
+       addr = zaddr = kmap_thread(page);
 
        end_index = (i_size - 1) >> PAGE_SHIFT;
        if (!i_size || page->index > end_index) {
@@ -692,7 +692,7 @@ static int populate_page(struct ubifs_info *c, struct page 
*page,
        SetPageUptodate(page);
        ClearPageError(page);
        flush_dcache_page(page);
-       kunmap(page);
+       kunmap_thread(page);
        *n = nn;
        return 0;
 
@@ -700,7 +700,7 @@ static int populate_page(struct ubifs_info *c, struct page 
*page,
        ClearPageUptodate(page);
        SetPageError(page);
        flush_dcache_page(page);
-       kunmap(page);
+       kunmap_thread(page);
        ubifs_err(c, "bad data node (block %u, inode %lu)",
                  page_block, inode->i_ino);
        return -EINVAL;
@@ -918,7 +918,7 @@ static int do_writepage(struct page *page, int len)
        /* Update radix tree tags */
        set_page_writeback(page);
 
-       addr = kmap(page);
+       addr = kmap_thread(page);
        block = page->index << UBIFS_BLOCKS_PER_PAGE_SHIFT;
        i = 0;
        while (len) {
@@ -950,7 +950,7 @@ static int do_writepage(struct page *page, int len)
        ClearPagePrivate(page);
        ClearPageChecked(page);
 
-       kunmap(page);
+       kunmap_thread(page);
        unlock_page(page);
        end_page_writeback(page);
        return err;
-- 
2.28.0.rc0.12.gb6a658bd00c9