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The writebufsize concept was introduce by commit "0e4ca7e mtd: add writebufsize field to mtd_info struct" and it represents the maximum amount of data the device writes to the media at a time. This is an important parameter for UBIFS which is used during recovery and which basically defines how big a corruption caused by a power cut can be. Set it to be equivalent to mtd->writesize because this is the maximum amount of data the driver writes at a time. Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Cc: stable@kernel.org [2.6.38+] Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>