Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/anholt...

[pandora-kernel.git] / arch / microblaze / lib / uaccess_old.S

diff --git a/arch/microblaze/lib/uaccess_old.S b/arch/microblaze/lib/uaccess_old.S
index 67f991c..5810cec 100644 (file)
--- a/arch/microblaze/lib/uaccess_old.S
+++ b/arch/microblaze/lib/uaccess_old.S
@@ -22,6 +22,7 @@
 
        .text
 .globl __strncpy_user;
+.type  __strncpy_user, @function
 .align 4;
 __strncpy_user:
 
@@ -50,7 +51,7 @@ __strncpy_user:
 3:
        rtsd    r15,8
        nop
-
+       .size   __strncpy_user, . - __strncpy_user
 
        .section        .fixup, "ax"
        .align  2
@@ -72,6 +73,7 @@ __strncpy_user:
 
        .text
 .globl __strnlen_user;
+.type  __strnlen_user, @function
 .align 4;
 __strnlen_user:
        addik   r3,r6,0
@@ -90,7 +92,7 @@ __strnlen_user:
 3:
        rtsd    r15,8
        nop
-
+       .size   __strnlen_user, . - __strnlen_user
 
        .section        .fixup,"ax"
 4:
@@ -108,6 +110,7 @@ __strnlen_user:
  */
        .text
 .globl __copy_tofrom_user;
+.type  __copy_tofrom_user, @function
 .align 4;
 __copy_tofrom_user:
        /*
@@ -116,20 +119,34 @@ __copy_tofrom_user:
         * r7, r3 - count
         * r4 - tempval
         */
-       addik   r3,r7,0
-       beqi    r3,3f
-1:
-       lbu     r4,r6,r0
-       addik   r6,r6,1
-2:
-       sb      r4,r5,r0
-       addik   r3,r3,-1
-       bneid   r3,1b
-       addik   r5,r5,1         /* delay slot */
+       beqid   r7, 3f /* zero size is not likely */
+       andi    r3, r7, 0x3 /* filter add count */
+       bneid   r3, 4f /* if is odd value then byte copying */
+       or      r3, r5, r6 /* find if is any to/from unaligned */
+       andi    r3, r3, 0x3 /* mask unaligned */
+       bneid   r3, 1f /* it is unaligned -> then jump */
+       or      r3, r0, r0
+
+/* at least one 4 byte copy */
+5:     lw      r4, r6, r3
+6:     sw      r4, r5, r3
+       addik   r7, r7, -4
+       bneid   r7, 5b
+       addik   r3, r3, 4
+       addik   r3, r7, 0
+       rtsd    r15, 8
+       nop
+4:     or      r3, r0, r0
+1:     lbu     r4,r6,r3
+2:     sb      r4,r5,r3
+       addik   r7,r7,-1
+       bneid   r7,1b
+       addik   r3,r3,1         /* delay slot */
 3:
+       addik   r3,r7,0
        rtsd    r15,8
        nop
-
+       .size   __copy_tofrom_user, . - __copy_tofrom_user
 
        .section        __ex_table,"a"
-       .word   1b,3b,2b,3b
+       .word   1b,3b,2b,3b,5b,3b,6b,3b