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btrfs: subpage: prepare for large data folios

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The subpage handling code has two locations not supporting large folios:

- btrfs_attach_subpage()
  Which is doing a metadata specific ASSERT() check.

  But for the future large data folios support, that check is too
  generic.  Since it's metadata specific, only check the ASSERT() for
  metadata.

- btrfs_subpage_assert()
  Just remove the "ASSERT(folio_order(folio) == 0)" check.

Signed-off-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Qu Wenruo 2025-03-17 17:40:51 +10:30 committed by David Sterba
parent c08d45de63
commit 3a8f948633
1 changed files with 2 additions and 4 deletions
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6
fs/btrfs/subpage.c
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@ -69,7 +69,8 @@ int btrfs_attach_subpage(const struct btrfs_fs_info *fs_info,
struct btrfs_subpage *subpage;
/* For metadata we don't support large folio yet. */
ASSERT(!folio_test_large(folio));
if (type == BTRFS_SUBPAGE_METADATA)
ASSERT(!folio_test_large(folio));
/*
* We have cases like a dummy extent buffer page, which is not mapped
@ -181,9 +182,6 @@ void btrfs_folio_dec_eb_refs(const struct btrfs_fs_info *fs_info, struct folio *
static void btrfs_subpage_assert(const struct btrfs_fs_info *fs_info,
struct folio *folio, u64 start, u32 len)
{
/* For subpage support, the folio must be single page. */
ASSERT(folio_order(folio) == 0);
/* Basic checks */
ASSERT(folio_test_private(folio) && folio_get_private(folio));
ASSERT(IS_ALIGNED(start, fs_info->sectorsize) &&