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FIEMAP API is not supported by tmpfs file system, but SEEK_HOLE/SEEK_DATA is supported. Returned back FilemapSeek class that implements support of SEEK_HOLE/SEEK_DATA API to make sparse_copy API working on tmpfs again. This reverts commit 6b80c13f7a82a312a3b981de5a56c66466ba1fac. (From OE-Core rev: e75bd6a7dd5c1b4bad039c35cf4a2ffc2f77c60a) Signed-off-by: Ed Bartosh <ed.bartosh@linux.intel.com> Signed-off-by: Ross Burton <ross.burton@intel.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>