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fscrypt: convert bh_get_inode_and_lblk_num to use a folio

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Patch series "Remove page_mapping()".

There are only a few users left.  Convert them all to either call
folio_mapping() or just use folio->mapping directly.  


This patch (of 6):

Remove uses of page->index, page_mapping() and b_page.  Saves a call
to compound_head().

Link: https://lkml.kernel.org/r/20240423225552.4113447-1-willy@infradead.org
Link: https://lkml.kernel.org/r/20240423225552.4113447-2-willy@infradead.org
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: Eric Biggers <ebiggers@google.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Cc: Sidhartha Kumar <sidhartha.kumar@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Matthew Wilcox (Oracle) 2024-04-23 23:55:32 +01:00 committed by Andrew Morton
parent b650e1d2ae
commit 262f014dd7
1 changed files with 3 additions and 3 deletions
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6
fs/crypto/inline_crypt.c
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@ -284,7 +284,7 @@ static bool bh_get_inode_and_lblk_num(const struct buffer_head *bh,
const struct inode **inode_ret,
u64 *lblk_num_ret)
{
struct page *page = bh->b_page;
struct folio *folio = bh->b_folio;
const struct address_space *mapping;
const struct inode *inode;
@ -292,13 +292,13 @@ static bool bh_get_inode_and_lblk_num(const struct buffer_head *bh,
* The ext4 journal (jbd2) can submit a buffer_head it directly created
* for a non-pagecache page. fscrypt doesn't care about these.
*/
mapping = page_mapping(page);
mapping = folio_mapping(folio);
if (!mapping)
return false;
inode = mapping->host;
*inode_ret = inode;
*lblk_num_ret = ((u64)page->index << (PAGE_SHIFT - inode->i_blkbits)) +
*lblk_num_ret = ((u64)folio->index << (PAGE_SHIFT - inode->i_blkbits)) +
(bh_offset(bh) >> inode->i_blkbits);
return true;
}