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hostfs: Convert hostfs_write_end() to use a folio

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Convert the passed page to a folio and operate on that.
Replaces four calls to compound_head() with one.

Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Signed-off-by: Christian Brauner <brauner@kernel.org>
This commit is contained in:
Matthew Wilcox (Oracle) 2024-07-12 12:08:54 -04:00 committed by Christian Brauner
parent a060d835cf
commit 02d8a3227f
No known key found for this signature in database
GPG Key ID: 91C61BC06578DCA2
1 changed files with 8 additions and 7 deletions
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15
fs/hostfs/hostfs_kern.c
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@ -479,17 +479,18 @@ static int hostfs_write_end(struct file *file, struct address_space *mapping,
loff_t pos, unsigned len, unsigned copied,
struct page *page, void *fsdata)
{
struct folio *folio = page_folio(page);
struct inode *inode = mapping->host;
void *buffer;
unsigned from = pos & (PAGE_SIZE - 1);
size_t from = offset_in_folio(folio, pos);
int err;
buffer = kmap_local_page(page);
err = write_file(FILE_HOSTFS_I(file)->fd, &pos, buffer + from, copied);
buffer = kmap_local_folio(folio, from);
err = write_file(FILE_HOSTFS_I(file)->fd, &pos, buffer, copied);
kunmap_local(buffer);
if (!PageUptodate(page) && err == PAGE_SIZE)
SetPageUptodate(page);
if (!folio_test_uptodate(folio) && err == folio_size(folio))
folio_mark_uptodate(folio);
/*
* If err > 0, write_file has added err to pos, so we are comparing
@ -497,8 +498,8 @@ static int hostfs_write_end(struct file *file, struct address_space *mapping,
*/
if (err > 0 && (pos > inode->i_size))
inode->i_size = pos;
unlock_page(page);
put_page(page);
folio_unlock(folio);
folio_put(folio);
return err;
}