On 09/05/2015 05:46 PM, Aurelien Jarno wrote: > The rotr, seh and wsbh instructions have been introduced with the R2 > ISA. Thus the current BPF code fails to build on pre-R2 little endian > CPUs: > > CC arch/mips/net/bpf_jit.o > AS arch/mips/net/bpf_jit_asm.o > /home/aurel32/linux-4.2/arch/mips/net/bpf_jit_asm.S: Assembler messages: > /home/aurel32/linux-4.2/arch/mips/net/bpf_jit_asm.S:67: Error: opcode not supported on this processor: mips32 (mips32) `wsbh $8,$19' > /home/aurel32/linux-4.2/arch/mips/net/bpf_jit_asm.S:68: Error: opcode not supported on this processor: mips32 (mips32) `rotr $19,$8,16' > /home/aurel32/linux-4.2/arch/mips/net/bpf_jit_asm.S:83: Error: opcode not supported on this processor: mips32 (mips32) `wsbh $8,$19' > /home/aurel32/linux-4.2/arch/mips/net/bpf_jit_asm.S:84: Error: opcode not supported on this processor: mips32 (mips32) `seh $19,$8' > /home/aurel32/linux-4.2/arch/mips/net/bpf_jit_asm.S:151: Error: opcode not supported on this processor: mips32 (mips32) `wsbh $8,$12' > /home/aurel32/linux-4.2/arch/mips/net/bpf_jit_asm.S:153: Error: opcode not supported on this processor: mips32 (mips32) `rotr $19,$8,16' > /home/aurel32/linux-4.2/arch/mips/net/bpf_jit_asm.S:164: Error: opcode not supported on this processor: mips32 (mips32) `wsbh $19,$12' > /home/aurel32/linux-4.2/scripts/Makefile.build:294: recipe for target 'arch/mips/net/bpf_jit_asm.o' failed > > Fix that by providing equivalent code for these CPUs. > > Cc: Ralf Baechle <ralf@xxxxxxxxxxxxxx> > Cc: Markos Chandras <markos.chandras@xxxxxxxxxx> > Cc: stable@xxxxxxxxxxxxxxx # v4.2+ > Signed-off-by: Aurelien Jarno <aurelien@xxxxxxxxxxx> > --- Reviewed-by: Markos Chandras <markos.chandras@xxxxxxxxxx> -- markos
