From 732703af9c3478c3f935dd5ae80140b9b12bda09 Mon Sep 17 00:00:00 2001 From: Arnd Bergmann Date: Tue, 31 Mar 2009 15:30:31 +0200 Subject: microblaze: clean up checksum.c This changes the function prototypes in the checksum code to have the usual prototypes, typically by turning int arguments into __wsum. Also change csum_partial_copy_from_user() to operate on the right address space and export ip_fast_csum, which is used in modular networking code. The new version is now sparse-clean including endianess checks. Signed-off-by: Arnd Bergmann Signed-off-by: Michal Simek --- arch/microblaze/lib/checksum.c | 31 ++++++++++++++++++++----------- 1 file changed, 20 insertions(+), 11 deletions(-) (limited to 'arch/microblaze/lib') diff --git a/arch/microblaze/lib/checksum.c b/arch/microblaze/lib/checksum.c index 809340070a1..f08e7459141 100644 --- a/arch/microblaze/lib/checksum.c +++ b/arch/microblaze/lib/checksum.c @@ -32,9 +32,10 @@ /* Revised by Kenneth Albanowski for m68knommu. Basic problem: unaligned access kills, so most of the assembly has to go. */ -#include -#include #include +#include + +#include static inline unsigned short from32to16(unsigned long x) { @@ -102,6 +103,7 @@ __sum16 ip_fast_csum(const void *iph, unsigned int ihl) { return (__force __sum16)~do_csum(iph, ihl*4); } +EXPORT_SYMBOL(ip_fast_csum); /* * computes the checksum of a memory block at buff, length len, @@ -115,15 +117,16 @@ __sum16 ip_fast_csum(const void *iph, unsigned int ihl) * * it's best to have buff aligned on a 32-bit boundary */ -__wsum csum_partial(const void *buff, int len, __wsum sum) +__wsum csum_partial(const void *buff, int len, __wsum wsum) { + unsigned int sum = (__force unsigned int)wsum; unsigned int result = do_csum(buff, len); /* add in old sum, and carry.. */ result += sum; if (sum > result) result += 1; - return result; + return (__force __wsum)result; } EXPORT_SYMBOL(csum_partial); @@ -131,9 +134,9 @@ EXPORT_SYMBOL(csum_partial); * this routine is used for miscellaneous IP-like checksums, mainly * in icmp.c */ -__sum16 ip_compute_csum(const unsigned char *buff, int len) +__sum16 ip_compute_csum(const void *buff, int len) { - return ~do_csum(buff, len); + return (__force __sum16)~do_csum(buff, len); } EXPORT_SYMBOL(ip_compute_csum); @@ -141,12 +144,18 @@ EXPORT_SYMBOL(ip_compute_csum); * copy from fs while checksumming, otherwise like csum_partial */ __wsum -csum_partial_copy_from_user(const char __user *src, char *dst, int len, - int sum, int *csum_err) +csum_partial_copy_from_user(const void __user *src, void *dst, int len, + __wsum sum, int *csum_err) { - if (csum_err) + int missing; + + missing = __copy_from_user(dst, src, len); + if (missing) { + memset(dst + len - missing, 0, missing); + *csum_err = -EFAULT; + } else *csum_err = 0; - memcpy(dst, src, len); + return csum_partial(dst, len, sum); } EXPORT_SYMBOL(csum_partial_copy_from_user); @@ -155,7 +164,7 @@ EXPORT_SYMBOL(csum_partial_copy_from_user); * copy from ds while checksumming, otherwise like csum_partial */ __wsum -csum_partial_copy(const char *src, char *dst, int len, int sum) +csum_partial_copy(const void *src, void *dst, int len, __wsum sum) { memcpy(dst, src, len); return csum_partial(dst, len, sum); -- cgit v1.2.3