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powerpc: Use generic checksum code in little endian

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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)