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mm: fix assertion in folio_end_read()

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We only need to assert that the uptodate flag is clear if we're going to
set it.  This hasn't been a problem before now because we have only used
folio_end_read() when completing with an error, but it's convenient to use
it in squashfs if we discover the folio is already uptodate.

Link: https://lkml.kernel.org/r/20250110163300.3346321-1-willy@infradead.org
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Phillip Lougher <phillip@squashfs.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Matthew Wilcox (Oracle) 2025-01-10 16:32:57 +00:00 committed by Andrew Morton
parent bd3d56ffa2
commit 1c47c57818
1 changed files with 1 additions and 1 deletions
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2
mm/filemap.c
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@ -1523,7 +1523,7 @@ void folio_end_read(struct folio *folio, bool success)
/* Must be in bottom byte for x86 to work */
BUILD_BUG_ON(PG_uptodate > 7);
VM_BUG_ON_FOLIO(!folio_test_locked(folio), folio);
VM_BUG_ON_FOLIO(folio_test_uptodate(folio), folio);
VM_BUG_ON_FOLIO(success && folio_test_uptodate(folio), folio);
if (likely(success))
mask |= 1 << PG_uptodate;