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xfs: use current->journal_info for detecting transaction recursion
commit 756b1c3 upstream. Because the iomap code using PF_MEMALLOC_NOFS to detect transaction recursion in XFS is just wrong. Remove it from the iomap code and replace it with XFS specific internal checks using current->journal_info instead. [djwong: This change also realigns the lifetime of NOFS flag changes to match the incore transaction, instead of the inconsistent scheme we have now.] Fixes: 9070733 ("xfs: abstract PF_FSTRANS to PF_MEMALLOC_NOFS") Signed-off-by: Dave Chinner <dchinner@redhat.com> Reviewed-by: Darrick J. Wong <djwong@kernel.org> Signed-off-by: Darrick J. Wong <djwong@kernel.org> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Amir Goldstein <amir73il@gmail.com> Acked-by: Darrick J. Wong <djwong@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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