Merge tag 'hwspinlock-3.6-fix' of git://git.kernel.org/pub/scm/linux/kernel/git/ohad...

[karo-tx-linux.git] / arch / arm / lib / getuser.S

diff --git a/arch/arm/lib/getuser.S b/arch/arm/lib/getuser.S
index 11093a7c3e32289e95a8c100cc01ef2bbb8d7101..9b06bb41fca659b9bbfc2f996e703ce2b8c315aa 100644 (file)
--- a/arch/arm/lib/getuser.S
+++ b/arch/arm/lib/getuser.S
@@ -16,8 +16,9 @@
  * __get_user_X
  *
  * Inputs:     r0 contains the address
+ *             r1 contains the address limit, which must be preserved
  * Outputs:    r0 is the error code
- *             r2, r3 contains the zero-extended value
+ *             r2 contains the zero-extended value
  *             lr corrupted
  *
  * No other registers must be altered.  (see <asm/uaccess.h>
@@ -27,33 +28,39 @@
  * Note also that it is intended that __get_user_bad is not global.
  */
 #include <linux/linkage.h>
+#include <asm/assembler.h>
 #include <asm/errno.h>
 #include <asm/domain.h>
 
 ENTRY(__get_user_1)
+       check_uaccess r0, 1, r1, r2, __get_user_bad
 1: TUSER(ldrb) r2, [r0]
        mov     r0, #0
        mov     pc, lr
 ENDPROC(__get_user_1)
 
 ENTRY(__get_user_2)
-#ifdef CONFIG_THUMB2_KERNEL
-2: TUSER(ldrb) r2, [r0]
-3: TUSER(ldrb) r3, [r0, #1]
+       check_uaccess r0, 2, r1, r2, __get_user_bad
+#ifdef CONFIG_CPU_USE_DOMAINS
+rb     .req    ip
+2:     ldrbt   r2, [r0], #1
+3:     ldrbt   rb, [r0], #0
 #else
-2: TUSER(ldrb) r2, [r0], #1
-3: TUSER(ldrb) r3, [r0]
+rb     .req    r0
+2:     ldrb    r2, [r0]
+3:     ldrb    rb, [r0, #1]
 #endif
 #ifndef __ARMEB__
-       orr     r2, r2, r3, lsl #8
+       orr     r2, r2, rb, lsl #8
 #else
-       orr     r2, r3, r2, lsl #8
+       orr     r2, rb, r2, lsl #8
 #endif
        mov     r0, #0
        mov     pc, lr
 ENDPROC(__get_user_2)
 
 ENTRY(__get_user_4)
+       check_uaccess r0, 4, r1, r2, __get_user_bad
 4: TUSER(ldr)  r2, [r0]
        mov     r0, #0
        mov     pc, lr