From: Bodo Stroesser Checksum handling largely depends on the subarch. Thus, I renamed i386 arch_csum_partial in arch/um/sys-i386/checksum.S back to csum_partial, removed csum_partial from arch/um/kernel/checksum.c and shifted EXPORT_SYMBOL(csum_partial) to arch/um/sys-i386/ksyms.c. Then, csum_partial_copy_to and csum_partial_copy_from were shifted from arch/um/kernel/checksum.c to arch/um/include/sysdep-i386/checksum.h and inserted in the calling functions csum_partial_copy_from_user() and csum_and_copy_to_user(). Now, arch/um/kernel/checksum.c is empty and removed. Signed-off-by: Bodo Stroesser Signed-off-by: Jeff Dike Signed-off-by: Andrew Morton --- arch/um/include/sysdep-i386/checksum.h | 39 ++++++++++++++++++--------------- arch/um/kernel/Makefile | 2 - arch/um/kernel/checksum.c | 36 ------------------------------ arch/um/sys-i386/checksum.S | 6 ++--- arch/um/sys-i386/ksyms.c | 3 -- 5 files changed, 27 insertions(+), 59 deletions(-) diff -puN arch/um/include/sysdep-i386/checksum.h~uml-s390-preparation-checksumming-done-in-arch-code arch/um/include/sysdep-i386/checksum.h --- 25/arch/um/include/sysdep-i386/checksum.h~uml-s390-preparation-checksumming-done-in-arch-code 2005-05-03 16:14:15.000000000 -0700 +++ 25-akpm/arch/um/include/sysdep-i386/checksum.h 2005-05-03 16:14:15.000000000 -0700 @@ -24,19 +24,6 @@ unsigned int csum_partial(const unsigned unsigned int sum); /* - * the same as csum_partial, but copies from src while it - * checksums, and handles user-space pointer exceptions correctly, when needed. - * - * here even more important to align src and dst on a 32-bit (or even - * better 64-bit) boundary - */ - -unsigned int csum_partial_copy_to(const unsigned char *src, unsigned char *dst, - int len, int sum, int *err_ptr); -unsigned int csum_partial_copy_from(const unsigned char *src, unsigned char *dst, - int len, int sum, int *err_ptr); - -/* * Note: when you get a NULL pointer exception here this means someone * passed in an incorrect kernel address to one of these functions. * @@ -52,11 +39,24 @@ unsigned int csum_partial_copy_nocheck(c return(csum_partial(dst, len, sum)); } +/* + * the same as csum_partial, but copies from src while it + * checksums, and handles user-space pointer exceptions correctly, when needed. + * + * here even more important to align src and dst on a 32-bit (or even + * better 64-bit) boundary + */ + static __inline__ unsigned int csum_partial_copy_from_user(const unsigned char *src, unsigned char *dst, int len, int sum, int *err_ptr) { - return csum_partial_copy_from(src, dst, len, sum, err_ptr); + if(copy_from_user(dst, src, len)){ + *err_ptr = -EFAULT; + return(-1); + } + + return csum_partial(dst, len, sum); } /* @@ -67,7 +67,6 @@ unsigned int csum_partial_copy_from_user */ #define csum_partial_copy_fromuser csum_partial_copy_from_user -unsigned int csum_partial_copy(const unsigned char *src, unsigned char *dst, int len, int sum); /* * This is a version of ip_compute_csum() optimized for IP headers, @@ -196,8 +195,14 @@ static __inline__ unsigned int csum_and_ unsigned char *dst, int len, int sum, int *err_ptr) { - if (access_ok(VERIFY_WRITE, dst, len)) - return(csum_partial_copy_to(src, dst, len, sum, err_ptr)); + if (access_ok(VERIFY_WRITE, dst, len)){ + if(copy_to_user(dst, src, len)){ + *err_ptr = -EFAULT; + return(-1); + } + + return csum_partial(src, len, sum); + } if (len) *err_ptr = -EFAULT; diff -puN arch/um/kernel/checksum.c~uml-s390-preparation-checksumming-done-in-arch-code arch/um/kernel/checksum.c --- 25/arch/um/kernel/checksum.c~uml-s390-preparation-checksumming-done-in-arch-code 2005-05-03 16:14:15.000000000 -0700 +++ 25-akpm/arch/um/kernel/checksum.c 2005-05-03 16:14:15.000000000 -0700 @@ -1,36 +0,0 @@ -#include "asm/uaccess.h" -#include "linux/errno.h" -#include "linux/module.h" - -unsigned int arch_csum_partial(const unsigned char *buff, int len, int sum); - -unsigned int csum_partial(unsigned char *buff, int len, int sum) -{ - return arch_csum_partial(buff, len, sum); -} - -EXPORT_SYMBOL(csum_partial); - -unsigned int csum_partial_copy_to(const unsigned char *src, - unsigned char __user *dst, int len, int sum, - int *err_ptr) -{ - if(copy_to_user(dst, src, len)){ - *err_ptr = -EFAULT; - return(-1); - } - - return(arch_csum_partial(src, len, sum)); -} - -unsigned int csum_partial_copy_from(const unsigned char __user *src, - unsigned char *dst, int len, int sum, - int *err_ptr) -{ - if(copy_from_user(dst, src, len)){ - *err_ptr = -EFAULT; - return(-1); - } - - return arch_csum_partial(dst, len, sum); -} diff -puN arch/um/kernel/Makefile~uml-s390-preparation-checksumming-done-in-arch-code arch/um/kernel/Makefile --- 25/arch/um/kernel/Makefile~uml-s390-preparation-checksumming-done-in-arch-code 2005-05-03 16:14:15.000000000 -0700 +++ 25-akpm/arch/um/kernel/Makefile 2005-05-03 16:14:15.000000000 -0700 @@ -6,7 +6,7 @@ extra-y := vmlinux.lds clean-files := -obj-y = checksum.o config.o exec_kern.o exitcode.o \ +obj-y = config.o exec_kern.o exitcode.o \ helper.o init_task.o irq.o irq_user.o ksyms.o main.o mem.o mem_user.o \ physmem.o process.o process_kern.o ptrace.o reboot.o resource.o \ sigio_user.o sigio_kern.o signal_kern.o signal_user.o smp.o \ diff -puN arch/um/sys-i386/checksum.S~uml-s390-preparation-checksumming-done-in-arch-code arch/um/sys-i386/checksum.S --- 25/arch/um/sys-i386/checksum.S~uml-s390-preparation-checksumming-done-in-arch-code 2005-05-03 16:14:15.000000000 -0700 +++ 25-akpm/arch/um/sys-i386/checksum.S 2005-05-03 16:14:15.000000000 -0700 @@ -38,7 +38,7 @@ unsigned int csum_partial(const unsigned .text .align 4 -.globl arch_csum_partial +.globl csum_partial #ifndef CONFIG_X86_USE_PPRO_CHECKSUM @@ -49,7 +49,7 @@ unsigned int csum_partial(const unsigned * Fortunately, it is easy to convert 2-byte alignment to 4-byte * alignment for the unrolled loop. */ -arch_csum_partial: +csum_partial: pushl %esi pushl %ebx movl 20(%esp),%eax # Function arg: unsigned int sum @@ -119,7 +119,7 @@ arch_csum_partial: /* Version for PentiumII/PPro */ -arch_csum_partial: +csum_partial: pushl %esi pushl %ebx movl 20(%esp),%eax # Function arg: unsigned int sum diff -puN arch/um/sys-i386/ksyms.c~uml-s390-preparation-checksumming-done-in-arch-code arch/um/sys-i386/ksyms.c --- 25/arch/um/sys-i386/ksyms.c~uml-s390-preparation-checksumming-done-in-arch-code 2005-05-03 16:14:15.000000000 -0700 +++ 25-akpm/arch/um/sys-i386/ksyms.c 2005-05-03 16:14:15.000000000 -0700 @@ -13,5 +13,4 @@ EXPORT_SYMBOL(__down_failed_trylock); EXPORT_SYMBOL(__up_wakeup); /* Networking helper routines. */ -EXPORT_SYMBOL(csum_partial_copy_from); -EXPORT_SYMBOL(csum_partial_copy_to); +EXPORT_SYMBOL(csum_partial); _