iomap: use largest_zero_folio() in iomap_dio_zero()

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iomap_dio_zero() uses a custom allocated memory of zeroes for padding
zeroes. This was a temporary solution until there was a way to request a
zero folio that was greater than the PAGE_SIZE.

Use largest_zero_folio() function instead of using the custom allocated
memory of zeroes. There is no guarantee from largest_zero_folio()
function that it will always return a PMD sized folio. Adapt the code so
that it can also work if largest_zero_folio() returns a ZERO_PAGE.

Signed-off-by: Pankaj Raghav <p.raghav@samsung.com>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Signed-off-by: Christian Brauner <brauner@kernel.org>

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Pankaj Raghav 2025-08-14 16:21:37 +02:00 • committed by Christian Brauner

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commit 10436adf9d

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1 changed files with 15 additions and 23 deletions

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fs/iomap/direct-io.c

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