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Commit 4e0748f5 authored by Markos Chandras's avatar Markos Chandras
Browse files

MIPS: Use generic checksum functions for MIPS R6 



The following instructions have been removed from MIPS R6

ulw, ulh, swl, lwr, lwl, swr.

However, all of them are used in the MIPS specific checksum implementation.
As a result of which, we will use the generic checksum on MIPS R6

Signed-off-by: default avatarMarkos Chandras <markos.chandras@imgtec.com>
parent 98a833c1

arch/mips/Kconfig

+5 −0
Original line number Diff line number Diff line
@@ -1034,6 +1034,9 @@ config MIPS_MACHINE 
config NO_IOPORT_MAP

	def_bool n



config GENERIC_CSUM

	bool



config GENERIC_ISA_DMA

	bool

	select ZONE_DMA if GENERIC_ISA_DMA_SUPPORT_BROKEN=n
@@ -1312,6 +1315,7 @@ config CPU_MIPS32_R6 
	select CPU_SUPPORTS_32BIT_KERNEL

	select CPU_SUPPORTS_HIGHMEM

	select CPU_SUPPORTS_MSA

	select GENERIC_CSUM

	select HAVE_KVM

	select MIPS_O32_FP64_SUPPORT

	help
@@ -1363,6 +1367,7 @@ config CPU_MIPS64_R6 
	select CPU_SUPPORTS_64BIT_KERNEL

	select CPU_SUPPORTS_HIGHMEM

	select CPU_SUPPORTS_MSA

	select GENERIC_CSUM

	help

	  Choose this option to build a kernel for release 6 or later of the

	  MIPS64 architecture.  New MIPS processors, starting with the Warrior

arch/mips/include/asm/Kbuild

+1 −0
Original line number Diff line number Diff line 
# MIPS headers

generic-(CONFIG_GENERIC_CSUM) += checksum.h

generic-y += cputime.h

generic-y += current.h

generic-y += dma-contiguous.h

arch/mips/include/asm/checksum.h

+5 −0
Original line number Diff line number Diff line
@@ -12,6 +12,10 @@ 
#ifndef _ASM_CHECKSUM_H

#define _ASM_CHECKSUM_H



#ifdef CONFIG_GENERIC_CSUM

#include <asm-generic/checksum.h>

#else



#include <linux/in6.h>



#include <asm/uaccess.h>
@@ -274,5 +278,6 @@ static __inline__ __sum16 csum_ipv6_magic(const struct in6_addr *saddr, 
}



#include <asm-generic/checksum.h>

#endif /* CONFIG_GENERIC_CSUM */



#endif /* _ASM_CHECKSUM_H */

arch/mips/kernel/mips_ksyms.c

+2 −0
Original line number Diff line number Diff line
@@ -67,11 +67,13 @@ EXPORT_SYMBOL(__strnlen_kernel_asm); 
EXPORT_SYMBOL(__strnlen_user_nocheck_asm);

EXPORT_SYMBOL(__strnlen_user_asm);



#ifndef CONFIG_CPU_MIPSR6

EXPORT_SYMBOL(csum_partial);

EXPORT_SYMBOL(csum_partial_copy_nocheck);

EXPORT_SYMBOL(__csum_partial_copy_kernel);

EXPORT_SYMBOL(__csum_partial_copy_to_user);

EXPORT_SYMBOL(__csum_partial_copy_from_user);

#endif



EXPORT_SYMBOL(invalid_pte_table);

#ifdef CONFIG_FUNCTION_TRACER

arch/mips/lib/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -8,6 +8,7 @@ lib-y += bitops.o csum_partial.o delay.o memcpy.o memset.o \ 


obj-y			+= iomap.o

obj-$(CONFIG_PCI)	+= iomap-pci.o

lib-$(CONFIG_GENERIC_CSUM)	:= $(filter-out csum_partial.o, $(lib-y))



obj-$(CONFIG_CPU_GENERIC_DUMP_TLB) += dump_tlb.o

obj-$(CONFIG_CPU_R3000)		+= r3k_dump_tlb.o