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Jane Chu
047218ec90
Introduce dax_recovery_write() operation. The function is used to recover a dax range that contains poison. Typical use case is when a user process receives a SIGBUS with si_code BUS_MCEERR_AR indicating poison(s) in a dax range, in response, the user process issues a pwrite() to the page-aligned dax range, thus clears the poison and puts valid data in the range. Reviewed-by: Christoph Hellwig <[email protected]> Signed-off-by: Jane Chu <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Dan Williams <[email protected]>