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There is no hardware control for DFLTCC window size. After this change, software and hardware window formats no longer match: the software will use wbits and wsize, and the hardware will use HB_BITS and HB_SIZE. Since neither dictionary manipulation nor internal allocation functions are relevant to kernel zlib and zlib_inflate_workspacesize() always use MAX_WBITS for window size calculation, only dfltcc_can_inflate() and dfltcc_inflate() functions are affected by this patch. This commit is based on: https://github.com/zlib-ng/zlib-ng/commit/3eab317 Link: https://lkml.kernel.org/r/20230126131428.1222214-8-zaslonko@linux.ibm.com Signed-off-by: Mikhail Zaslonko <zaslonko@linux.ibm.com> Acked-by: Ilya Leoshkevich <iii@linux.ibm.com> Cc: Heiko Carstens <hca@linux.ibm.com> Cc: Vasily Gorbik <gor@linux.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>