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author | Bodo Stroesser <bstroesser@fujitsu-siemens.com> | 2005-05-05 16:15:36 -0700 |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-05-05 16:36:38 -0700 |
commit | 7d37c6d52fce13008f20344790a81a6a5a0003b3 (patch) | |
tree | ebf98bc32d8c0e29627f7be8a4dd349a32efff1d /arch/um | |
parent | c52ac046757deebc514483e407dca39a9c774aa3 (diff) | |
download | kernel_samsung_crespo-7d37c6d52fce13008f20344790a81a6a5a0003b3.zip kernel_samsung_crespo-7d37c6d52fce13008f20344790a81a6a5a0003b3.tar.gz kernel_samsung_crespo-7d37c6d52fce13008f20344790a81a6a5a0003b3.tar.bz2 |
[PATCH] uml: s390 preparation, checksumming done in arch code
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 <bstroesser@fujitsu-siemens.com>
Signed-off-by: Jeff Dike <jdike@addtoit.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'arch/um')
-rw-r--r-- | arch/um/include/sysdep-i386/checksum.h | 39 | ||||
-rw-r--r-- | arch/um/kernel/Makefile | 2 | ||||
-rw-r--r-- | arch/um/kernel/checksum.c | 36 | ||||
-rw-r--r-- | arch/um/sys-i386/checksum.S | 6 | ||||
-rw-r--r-- | arch/um/sys-i386/ksyms.c | 3 |
5 files changed, 27 insertions, 59 deletions
diff --git a/arch/um/include/sysdep-i386/checksum.h b/arch/um/include/sysdep-i386/checksum.h index 3a2a458..764ba4d 100644 --- a/arch/um/include/sysdep-i386/checksum.h +++ b/arch/um/include/sysdep-i386/checksum.h @@ -24,19 +24,6 @@ unsigned int csum_partial(const unsigned char * buff, int len, 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(const unsigned char *src, unsigned char * 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(const unsigned char *src, unsigned char */ #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_copy_to_user(const unsigned char *src, 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 --git a/arch/um/kernel/Makefile b/arch/um/kernel/Makefile index 9d2c261..dca6542 100644 --- a/arch/um/kernel/Makefile +++ b/arch/um/kernel/Makefile @@ -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 --git a/arch/um/kernel/checksum.c b/arch/um/kernel/checksum.c index e69b2be..e69de29 100644 --- a/arch/um/kernel/checksum.c +++ b/arch/um/kernel/checksum.c @@ -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 --git a/arch/um/sys-i386/checksum.S b/arch/um/sys-i386/checksum.S index a11171f..d98b2ff 100644 --- a/arch/um/sys-i386/checksum.S +++ b/arch/um/sys-i386/checksum.S @@ -38,7 +38,7 @@ unsigned int csum_partial(const unsigned char * buff, int len, unsigned int sum) .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 char * buff, int len, unsigned int sum) * 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 --git a/arch/um/sys-i386/ksyms.c b/arch/um/sys-i386/ksyms.c index 74f70a1..b10bfdd 100644 --- a/arch/um/sys-i386/ksyms.c +++ b/arch/um/sys-i386/ksyms.c @@ -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); |