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buffer: Use a folio in generic_write_end()

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Replaces two implicit 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) 2024-07-10 13:46:15 -04:00 committed by Christian Brauner
parent 1262249d03
commit 696876d035
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GPG Key ID: 91C61BC06578DCA2
1 changed files with 4 additions and 3 deletions
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7
fs/buffer.c
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@ -2283,6 +2283,7 @@ int generic_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;
loff_t old_size = inode->i_size;
bool i_size_changed = false;
@ -2293,7 +2294,7 @@ int generic_write_end(struct file *file, struct address_space *mapping,
* No need to use i_size_read() here, the i_size cannot change under us
* because we hold i_rwsem.
*
* But it's important to update i_size while still holding page lock:
* But it's important to update i_size while still holding folio lock:
* page writeout could otherwise come in and zero beyond i_size.
*/
if (pos + copied > inode->i_size) {
@ -2301,8 +2302,8 @@ int generic_write_end(struct file *file, struct address_space *mapping,
i_size_changed = true;
}
unlock_page(page);
put_page(page);
folio_unlock(folio);
folio_put(folio);
if (old_size < pos)
pagecache_isize_extended(inode, old_size, pos);