um: remove csum_partial_copy_generic_i386 to clean up exception table

arch/x86/um/checksum_32.S had been copy & paste from x86. When build
x86 uml, csum_partial_copy_generic_i386 mess up the exception table.
In fact, exception table dose not work in uml kernel.

And csum_partial_copy_generic_i386 never been called. So, delete it.

Signed-off-by: Honggang Li <enjoymindful@gmail.com>
Signed-off-by: Richard Weinberger <richard@nod.at>

diff --git a/arch/x86/um/checksum_32.S b/arch/x86/um/checksum_32.S
index 8d0c420..fa4b8b9 100644 (file)
--- a/arch/x86/um/checksum_32.S
+++ b/arch/x86/um/checksum_32.S
@@ -214,242 +214,3 @@ csum_partial:
        ret
                                
 #endif
-
-/*
-unsigned int csum_partial_copy_generic (const char *src, char *dst,
-                                 int len, int sum, int *src_err_ptr, int *dst_err_ptr)
- */ 
-
-/*
- * Copy from ds while checksumming, otherwise like csum_partial
- *
- * The macros SRC and DST specify the type of access for the instruction.
- * thus we can call a custom exception handler for all access types.
- *
- * FIXME: could someone double-check whether I haven't mixed up some SRC and
- *       DST definitions? It's damn hard to trigger all cases.  I hope I got
- *       them all but there's no guarantee.
- */
-
-#define SRC(y...)                      \
-       9999: y;                        \
-       _ASM_EXTABLE(9999b, 6001f)
-
-#define DST(y...)                      \
-       9999: y;                        \
-       _ASM_EXTABLE(9999b, 6002f)
-
-.align 4
-
-#ifndef CONFIG_X86_USE_PPRO_CHECKSUM
-
-#define ARGBASE 16             
-#define FP             12
-
-csum_partial_copy_generic_i386:
-       subl  $4,%esp   
-       pushl %edi
-       pushl %esi
-       pushl %ebx
-       movl ARGBASE+16(%esp),%eax      # sum
-       movl ARGBASE+12(%esp),%ecx      # len
-       movl ARGBASE+4(%esp),%esi       # src
-       movl ARGBASE+8(%esp),%edi       # dst
-
-       testl $2, %edi                  # Check alignment. 
-       jz 2f                           # Jump if alignment is ok.
-       subl $2, %ecx                   # Alignment uses up two bytes.
-       jae 1f                          # Jump if we had at least two bytes.
-       addl $2, %ecx                   # ecx was < 2.  Deal with it.
-       jmp 4f
-SRC(1: movw (%esi), %bx        )
-       addl $2, %esi
-DST(   movw %bx, (%edi)        )
-       addl $2, %edi
-       addw %bx, %ax   
-       adcl $0, %eax
-2:
-       movl %ecx, FP(%esp)
-       shrl $5, %ecx
-       jz 2f
-       testl %esi, %esi
-SRC(1: movl (%esi), %ebx       )
-SRC(   movl 4(%esi), %edx      )
-       adcl %ebx, %eax
-DST(   movl %ebx, (%edi)       )
-       adcl %edx, %eax
-DST(   movl %edx, 4(%edi)      )
-
-SRC(   movl 8(%esi), %ebx      )
-SRC(   movl 12(%esi), %edx     )
-       adcl %ebx, %eax
-DST(   movl %ebx, 8(%edi)      )
-       adcl %edx, %eax
-DST(   movl %edx, 12(%edi)     )
-
-SRC(   movl 16(%esi), %ebx     )
-SRC(   movl 20(%esi), %edx     )
-       adcl %ebx, %eax
-DST(   movl %ebx, 16(%edi)     )
-       adcl %edx, %eax
-DST(   movl %edx, 20(%edi)     )
-
-SRC(   movl 24(%esi), %ebx     )
-SRC(   movl 28(%esi), %edx     )
-       adcl %ebx, %eax
-DST(   movl %ebx, 24(%edi)     )
-       adcl %edx, %eax
-DST(   movl %edx, 28(%edi)     )
-
-       lea 32(%esi), %esi
-       lea 32(%edi), %edi
-       dec %ecx
-       jne 1b
-       adcl $0, %eax
-2:     movl FP(%esp), %edx
-       movl %edx, %ecx
-       andl $0x1c, %edx
-       je 4f
-       shrl $2, %edx                   # This clears CF
-SRC(3: movl (%esi), %ebx       )
-       adcl %ebx, %eax
-DST(   movl %ebx, (%edi)       )
-       lea 4(%esi), %esi
-       lea 4(%edi), %edi
-       dec %edx
-       jne 3b
-       adcl $0, %eax
-4:     andl $3, %ecx
-       jz 7f
-       cmpl $2, %ecx
-       jb 5f
-SRC(   movw (%esi), %cx        )
-       leal 2(%esi), %esi
-DST(   movw %cx, (%edi)        )
-       leal 2(%edi), %edi
-       je 6f
-       shll $16,%ecx
-SRC(5: movb (%esi), %cl        )
-DST(   movb %cl, (%edi)        )
-6:     addl %ecx, %eax
-       adcl $0, %eax
-7:
-5000:
-
-# Exception handler:
-.section .fixup, "ax"                                                  
-
-6001:
-       movl ARGBASE+20(%esp), %ebx     # src_err_ptr
-       movl $-EFAULT, (%ebx)
-
-       # zero the complete destination - computing the rest
-       # is too much work 
-       movl ARGBASE+8(%esp), %edi      # dst
-       movl ARGBASE+12(%esp), %ecx     # len
-       xorl %eax,%eax
-       rep ; stosb
-
-       jmp 5000b
-
-6002:
-       movl ARGBASE+24(%esp), %ebx     # dst_err_ptr
-       movl $-EFAULT,(%ebx)
-       jmp 5000b
-
-.previous
-
-       popl %ebx
-       popl %esi
-       popl %edi
-       popl %ecx                       # equivalent to addl $4,%esp
-       ret     
-
-#else
-
-/* Version for PentiumII/PPro */
-
-#define ROUND1(x) \
-       SRC(movl x(%esi), %ebx  )       ;       \
-       addl %ebx, %eax                 ;       \
-       DST(movl %ebx, x(%edi)  )       ; 
-
-#define ROUND(x) \
-       SRC(movl x(%esi), %ebx  )       ;       \
-       adcl %ebx, %eax                 ;       \
-       DST(movl %ebx, x(%edi)  )       ;
-
-#define ARGBASE 12
-               
-csum_partial_copy_generic_i386:
-       pushl %ebx
-       pushl %edi
-       pushl %esi
-       movl ARGBASE+4(%esp),%esi       #src
-       movl ARGBASE+8(%esp),%edi       #dst    
-       movl ARGBASE+12(%esp),%ecx      #len
-       movl ARGBASE+16(%esp),%eax      #sum
-#      movl %ecx, %edx  
-       movl %ecx, %ebx  
-       movl %esi, %edx
-       shrl $6, %ecx     
-       andl $0x3c, %ebx  
-       negl %ebx
-       subl %ebx, %esi  
-       subl %ebx, %edi  
-       lea  -1(%esi),%edx
-       andl $-32,%edx
-       lea 3f(%ebx,%ebx), %ebx
-       testl %esi, %esi 
-       jmp *%ebx
-1:     addl $64,%esi
-       addl $64,%edi 
-       SRC(movb -32(%edx),%bl) ; SRC(movb (%edx),%bl)
-       ROUND1(-64) ROUND(-60) ROUND(-56) ROUND(-52)    
-       ROUND (-48) ROUND(-44) ROUND(-40) ROUND(-36)    
-       ROUND (-32) ROUND(-28) ROUND(-24) ROUND(-20)    
-       ROUND (-16) ROUND(-12) ROUND(-8)  ROUND(-4)     
-3:     adcl $0,%eax
-       addl $64, %edx
-       dec %ecx
-       jge 1b
-4:     movl ARGBASE+12(%esp),%edx      #len
-       andl $3, %edx
-       jz 7f
-       cmpl $2, %edx
-       jb 5f
-SRC(   movw (%esi), %dx         )
-       leal 2(%esi), %esi
-DST(   movw %dx, (%edi)         )
-       leal 2(%edi), %edi
-       je 6f
-       shll $16,%edx
-5:
-SRC(   movb (%esi), %dl         )
-DST(   movb %dl, (%edi)         )
-6:     addl %edx, %eax
-       adcl $0, %eax
-7:
-.section .fixup, "ax"
-6001:  movl    ARGBASE+20(%esp), %ebx  # src_err_ptr   
-       movl $-EFAULT, (%ebx)
-       # zero the complete destination (computing the rest is too much work)
-       movl ARGBASE+8(%esp),%edi       # dst
-       movl ARGBASE+12(%esp),%ecx      # len
-       xorl %eax,%eax
-       rep; stosb
-       jmp 7b
-6002:  movl ARGBASE+24(%esp), %ebx     # dst_err_ptr
-       movl $-EFAULT, (%ebx)
-       jmp  7b                 
-.previous                              
-
-       popl %esi
-       popl %edi
-       popl %ebx
-       ret
-                               
-#undef ROUND
-#undef ROUND1          
-               
-#endif