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netfs: Use folio_next_pos()

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This is one instruction more efficient than open-coding folio_pos() +
folio_size().  It's the equivalent of (x + y) << z rather than
x << z + y << z.

Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Link: https://patch.msgid.link/20251024170822.1427218-9-willy@infradead.org
Acked-by: David Howells <dhowells@redhat.com>
Reviewed-by: Paulo Alcantara (Red Hat) <pc@manguebit.org>
Cc: David Howells <dhowells@redhat.com>
Cc: Paulo Alcantara <pc@manguebit.org>
Cc: netfs@lists.linux.dev
Signed-off-by: Christian Brauner <brauner@kernel.org>
This commit is contained in:
Matthew Wilcox (Oracle) 2025-10-24 18:08:16 +01:00 • committed by Christian Brauner
parent ac97520804
commit 2408900d40
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GPG key ID: 91C61BC06578DCA2
2 changed files with 2 additions and 2 deletions
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2
fs/netfs/buffered_write.c
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@ -535,7 +535,7 @@ vm_fault_t netfs_page_mkwrite(struct vm_fault *vmf, struct netfs_group *netfs_gr
folio_unlock(folio);
err = filemap_fdatawrite_range(mapping,
folio_pos(folio),
folio_pos(folio) + folio_size(folio));
folio_next_pos(folio));
switch (err) {
case 0:
ret = VM_FAULT_RETRY;

2
fs/netfs/misc.c
View file

@ -298,7 +298,7 @@ bool netfs_release_folio(struct folio *folio, gfp_t gfp)
if (folio_test_dirty(folio))
return false;
end = umin(folio_pos(folio) + folio_size(folio), i_size_read(&ctx->inode));
end = umin(folio_next_pos(folio), i_size_read(&ctx->inode));
if (end > ctx->zero_point)
ctx->zero_point = end;