Linux kernel stable tree (mirror) https://git.radix-linux.su/kernel/linux.git/atom?h=linux-4.7.y 2016-05-28T19:48:58+00:00 2016-05-28T19:48:58+00:00 George Spelvin linux@sciencehorizons.net 2016-05-25T15:06:09+00:00 urn:sha1:7b13277b682972c2ff8f6419e86c333d81936023 Microblaze is an FPGA soft core that can be configured various ways. If it is configured without a multiplier, the standard __hash_32() will require a call to __mulsi3, which is a slow software loop. Instead, use a shift-and-add sequence for the constant multiply. GCC knows how to do this, but it's not as clever as some. Signed-off-by: George Spelvin <linux@sciencehorizons.net> Cc: Alistair Francis <alistair.francis@xilinx.com> Cc: Michal Simek <michal.simek@xilinx.com>