ecryptfs: Convert lower_offset_for_page() to take a folio

Both callers have a folio, so pass it in and use folio->index instead of
page->index.

Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Link: https://lore.kernel.org/r/20241025190822.1319162-10-willy@infradead.org
Signed-off-by: Christian Brauner <brauner@kernel.org>

diff --git a/fs/ecryptfs/crypto.c b/fs/ecryptfs/crypto.c
index 90d38da..bb65a3a 100644 (file)
--- a/fs/ecryptfs/crypto.c
+++ b/fs/ecryptfs/crypto.c
@@ -328,10 +328,10 @@ out:
  * Convert an eCryptfs page index into a lower byte offset
  */
 static loff_t lower_offset_for_page(struct ecryptfs_crypt_stat *crypt_stat,
-                                   struct page *page)
+                                   struct folio *folio)
 {
        return ecryptfs_lower_header_size(crypt_stat) +
-              ((loff_t)page->index << PAGE_SHIFT);
+              (loff_t)folio->index * PAGE_SIZE;
 }
 
 /**
@@ -440,7 +440,7 @@ int ecryptfs_encrypt_page(struct folio *folio)
                }
        }
 
-       lower_offset = lower_offset_for_page(crypt_stat, &folio->page);
+       lower_offset = lower_offset_for_page(crypt_stat, folio);
        enc_extent_virt = kmap_local_page(enc_extent_page);
        rc = ecryptfs_write_lower(ecryptfs_inode, enc_extent_virt, lower_offset,
                                  PAGE_SIZE);
@@ -489,7 +489,7 @@ int ecryptfs_decrypt_page(struct folio *folio)
                &(ecryptfs_inode_to_private(ecryptfs_inode)->crypt_stat);
        BUG_ON(!(crypt_stat->flags & ECRYPTFS_ENCRYPTED));
 
-       lower_offset = lower_offset_for_page(crypt_stat, &folio->page);
+       lower_offset = lower_offset_for_page(crypt_stat, folio);
        page_virt = kmap_local_folio(folio, 0);
        rc = ecryptfs_read_lower(page_virt, lower_offset, PAGE_SIZE,
                                 ecryptfs_inode);