Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 210 insertions, 0 deletions

diff --git a/arch/s390/lib/uaccess.S b/arch/s390/lib/uaccess.S
new file mode 100644
index 000000000000..e8029ef42ef2
--- /dev/null
+++ b/arch/s390/lib/uaccess.S
@@ -0,0 +1,210 @@
+/*
+ *  arch/s390/lib/uaccess.S
+ *    __copy_{from|to}_user functions.
+ *
+ *  s390
+ *    Copyright (C) 2000,2002 IBM Deutschland Entwicklung GmbH, IBM Corporation
+ *    Authors(s): Martin Schwidefsky (schwidefsky@de.ibm.com)
+ *
+ *  These functions have standard call interface
+ */
+
+#include <linux/errno.h>
+#include <asm/lowcore.h>
+#include <asm/offsets.h>
+
+        .text
+        .align 4
+        .globl __copy_from_user_asm
+        # %r2 = to, %r3 = n, %r4 = from
+__copy_from_user_asm:
+        slr     %r0,%r0
+0:      mvcp    0(%r3,%r2),0(%r4),%r0
+        jnz     1f
+        slr     %r2,%r2
+        br      %r14
+1:      la      %r2,256(%r2)
+        la      %r4,256(%r4)
+        ahi     %r3,-256
+2:      mvcp    0(%r3,%r2),0(%r4),%r0
+        jnz     1b
+3:      slr     %r2,%r2
+        br      %r14
+4:      lhi     %r0,-4096
+        lr      %r5,%r4
+        slr     %r5,%r0
+        nr      %r5,%r0         # %r5 = (%r4 + 4096) & -4096
+        slr     %r5,%r4         # %r5 = #bytes to next user page boundary
+        clr     %r3,%r5         # copy crosses next page boundary ?
+        jnh     6f              # no, the current page faulted
+        # move with the reduced length which is < 256
+5:      mvcp    0(%r5,%r2),0(%r4),%r0
+        slr     %r3,%r5
+6:      lr      %r2,%r3
+        br      %r14
+        .section __ex_table,"a"
+        .long   0b,4b
+        .long   2b,4b
+        .long   5b,6b
+        .previous
+
+        .align 4
+        .text
+        .globl __copy_to_user_asm
+        # %r2 = from, %r3 = n, %r4 = to
+__copy_to_user_asm:
+        slr     %r0,%r0
+0:      mvcs    0(%r3,%r4),0(%r2),%r0
+        jnz     1f
+        slr     %r2,%r2
+        br      %r14
+1:      la      %r2,256(%r2)
+        la      %r4,256(%r4)
+        ahi     %r3,-256
+2:      mvcs    0(%r3,%r4),0(%r2),%r0
+        jnz     1b
+3:      slr     %r2,%r2
+        br      %r14
+4:      lhi     %r0,-4096
+        lr      %r5,%r4
+        slr     %r5,%r0
+        nr      %r5,%r0         # %r5 = (%r4 + 4096) & -4096
+        slr     %r5,%r4         # %r5 = #bytes to next user page boundary
+        clr     %r3,%r5         # copy crosses next page boundary ?
+        jnh     6f              # no, the current page faulted
+        # move with the reduced length which is < 256
+5:      mvcs    0(%r5,%r4),0(%r2),%r0
+        slr     %r3,%r5
+6:      lr      %r2,%r3
+        br      %r14
+        .section __ex_table,"a"
+        .long   0b,4b
+        .long   2b,4b
+        .long   5b,6b
+        .previous
+
+        .align 4
+        .text
+        .globl __copy_in_user_asm
+        # %r2 = from, %r3 = n, %r4 = to
+__copy_in_user_asm:
+        sacf    256
+        bras    1,1f
+        mvc     0(1,%r4),0(%r2)
+0:      mvc     0(256,%r4),0(%r2)
+        la      %r2,256(%r2)
+        la      %r4,256(%r4)
+1:      ahi     %r3,-256
+        jnm     0b
+2:      ex      %r3,0(%r1)
+        sacf    0
+        slr     %r2,%r2
+        br      14
+3:      mvc     0(1,%r4),0(%r2)
+        la      %r2,1(%r2)
+        la      %r4,1(%r4)
+        ahi     %r3,-1
+        jnm     3b
+4:      lr      %r2,%r3
+        sacf    0
+        br      %r14
+        .section __ex_table,"a"
+        .long   0b,3b
+        .long   2b,3b
+        .long   3b,4b
+        .previous
+
+        .align 4
+        .text
+        .globl __clear_user_asm
+        # %r2 = to, %r3 = n
+__clear_user_asm:
+        bras    %r5,0f
+        .long   empty_zero_page
+0:      l       %r5,0(%r5)
+        slr     %r0,%r0
+1:      mvcs    0(%r3,%r2),0(%r5),%r0
+        jnz     2f
+        slr     %r2,%r2
+        br      %r14
+2:      la      %r2,256(%r2)
+        ahi     %r3,-256
+3:      mvcs    0(%r3,%r2),0(%r5),%r0
+        jnz     2b
+4:      slr     %r2,%r2
+        br      %r14
+5:      lhi     %r0,-4096
+        lr      %r4,%r2
+        slr     %r4,%r0
+        nr      %r4,%r0         # %r4 = (%r2 + 4096) & -4096
+        slr     %r4,%r2         # %r4 = #bytes to next user page boundary
+        clr     %r3,%r4         # clear crosses next page boundary ?
+        jnh     7f              # no, the current page faulted
+        # clear with the reduced length which is < 256
+6:      mvcs    0(%r4,%r2),0(%r5),%r0
+        slr     %r3,%r4
+7:      lr      %r2,%r3
+        br      %r14
+        .section __ex_table,"a"
+        .long   1b,5b
+        .long   3b,5b
+        .long   6b,7b
+        .previous
+
+        .align 4
+        .text
+        .globl __strncpy_from_user_asm
+        # %r2 = count, %r3 = dst, %r4 = src
+__strncpy_from_user_asm:
+        lhi     %r0,0
+        lr      %r1,%r4
+        la      %r4,0(%r4)      # clear high order bit from %r4
+        la      %r2,0(%r2,%r4)  # %r2 points to first byte after string
+        sacf    256
+0:      srst    %r2,%r1
+        jo      0b
+        sacf    0
+        lr      %r1,%r2
+        jh      1f              # \0 found in string ?
+        ahi     %r1,1           # include \0 in copy
+1:      slr     %r1,%r4         # %r1 = copy length (without \0)
+        slr     %r2,%r4         # %r2 = return length (including \0)
+2:      mvcp    0(%r1,%r3),0(%r4),%r0
+        jnz     3f
+        br      %r14
+3:      la      %r3,256(%r3)
+        la      %r4,256(%r4)
+        ahi     %r1,-256
+        mvcp    0(%r1,%r3),0(%r4),%r0
+        jnz     3b
+        br      %r14
+4:      sacf    0
+        lhi     %r2,-EFAULT
+        br      %r14
+        .section __ex_table,"a"
+        .long   0b,4b
+        .previous
+
+        .align 4
+        .text
+        .globl __strnlen_user_asm
+        # %r2 = count, %r3 = src
+__strnlen_user_asm:
+        lhi     %r0,0
+        lr      %r1,%r3
+        la      %r3,0(%r3)      # clear high order bit from %r4
+        la      %r2,0(%r2,%r3)  # %r2 points to first byte after string
+        sacf    256
+0:      srst    %r2,%r1
+        jo      0b
+        sacf    0
+        jh      1f              # \0 found in string ?
+        ahi     %r2,1           # strnlen_user result includes the \0
+1:      slr     %r2,%r3
+        br      %r14
+2:      sacf    0
+        lhi     %r2,-EFAULT
+        br      %r14
+        .section __ex_table,"a"
+        .long   0b,2b
+        .previous