xfs: add a fast path to xfs_buf_zero when b_addr is set

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No need to walk the page list if bp->b_addr is valid.  That also means
b_offset doesn't need to be taken into account in the unmapped loop as
b_offset is only set for kmem backed buffers which are always mapped.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Signed-off-by: Carlos Maiolino <cem@kernel.org>

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Christoph Hellwig 2025-03-10 14:19:05 +01:00 • committed by Carlos Maiolino

parent 69659e46b7

commit f2a3717a74

1 changed files with 7 additions and 2 deletions

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fs/xfs/xfs_buf.c

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