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powerpc: Use generic checksum code in little endian 

We need to fix some endian issues in our checksum code. For now
just enable the generic checksum routines for little endian builds.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
Anton Blanchard 2013-09-23 12:04:51 +10:00 committed by Benjamin Herrenschmidt
parent 52055d07ce
commit 7a332b0c9a
4 changed files with 17 additions and 2 deletions
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3
arch/powerpc/Kconfig
View File

@ -139,6 +139,9 @@ config PPC
select OLD_SIGACTION if PPC32
select HAVE_DEBUG_STACKOVERFLOW
config GENERIC_CSUM
def_bool CPU_LITTLE_ENDIAN
config EARLY_PRINTK
bool
default y

5
arch/powerpc/include/asm/checksum.h
View File

@ -14,6 +14,9 @@
* which always checksum on 4 octet boundaries. ihl is the number
* of 32-bit words and is always >= 5.
*/
#ifdef CONFIG_GENERIC_CSUM
#include <asm-generic/checksum.h>
#else
extern __sum16 ip_fast_csum(const void *iph, unsigned int ihl);
/*
@ -123,5 +126,7 @@ static inline __wsum csum_tcpudp_nofold(__be32 saddr, __be32 daddr,
return sum;
#endif
}
#endif
#endif /* __KERNEL__ */
#endif

2
arch/powerpc/kernel/ppc_ksyms.c
View File

@ -79,10 +79,12 @@ EXPORT_SYMBOL(strlen);
EXPORT_SYMBOL(strcmp);
EXPORT_SYMBOL(strncmp);
#ifndef CONFIG_GENERIC_CSUM
EXPORT_SYMBOL(csum_partial);
EXPORT_SYMBOL(csum_partial_copy_generic);
EXPORT_SYMBOL(ip_fast_csum);
EXPORT_SYMBOL(csum_tcpudp_magic);
#endif
EXPORT_SYMBOL(__copy_tofrom_user);
EXPORT_SYMBOL(__clear_user);

9
arch/powerpc/lib/Makefile
View File

@ -10,15 +10,20 @@ CFLAGS_REMOVE_code-patching.o = -pg
CFLAGS_REMOVE_feature-fixups.o = -pg
obj-y := string.o alloc.o \
checksum_$(CONFIG_WORD_SIZE).o crtsavres.o
crtsavres.o
obj-$(CONFIG_PPC32) += div64.o copy_32.o
obj-$(CONFIG_HAS_IOMEM) += devres.o
obj-$(CONFIG_PPC64) += copypage_64.o copyuser_64.o \
memcpy_64.o usercopy_64.o mem_64.o string.o \
checksum_wrappers_64.o hweight_64.o \
hweight_64.o \
copyuser_power7.o string_64.o copypage_power7.o \
memcpy_power7.o
ifeq ($(CONFIG_GENERIC_CSUM),)
obj-y += checksum_$(CONFIG_WORD_SIZE).o
obj-$(CONFIG_PPC64) += checksum_wrappers_64.o
endif
obj-$(CONFIG_PPC_EMULATE_SSTEP) += sstep.o ldstfp.o
ifeq ($(CONFIG_PPC64),y)