1 files changed, 6 insertions, 7 deletions

diff --git a/arch/arm/mm/alignment.c b/arch/arm/mm/alignment.c
index b820edaf3184..6f4585b89078 100644
--- a/arch/arm/mm/alignment.c
+++ b/arch/arm/mm/alignment.c
@@ -749,7 +749,6 @@ do_alignment(unsigned long addr, unsigned int fsr, struct pt_regs *regs)
         unsigned long instr = 0, instrptr;
         int (*handler)(unsigned long addr, unsigned long instr, struct pt_regs *regs);
         unsigned int type;
-        mm_segment_t fs;
         unsigned int fault;
         u16 tinstr = 0;
         int isize = 4;
@@ -760,16 +759,15 @@ do_alignment(unsigned long addr, unsigned int fsr, struct pt_regs *regs)
 
         instrptr = instruction_pointer(regs);
 
-        fs = get_fs();
-        set_fs(KERNEL_DS);
         if (thumb_mode(regs)) {
-                fault = __get_user(tinstr, (u16 *)(instrptr & ~1));
+                u16 *ptr = (u16 *)(instrptr & ~1);
+                fault = probe_kernel_address(ptr, tinstr);
                 if (!fault) {
                         if (cpu_architecture() >= CPU_ARCH_ARMv7 &&
                             IS_T32(tinstr)) {
                                 /* Thumb-2 32-bit */
                                 u16 tinst2 = 0;
-                                fault = __get_user(tinst2, (u16 *)(instrptr+2));
+                                fault = probe_kernel_address(ptr + 1, tinst2);
                                 instr = (tinstr << 16) | tinst2;
                                 thumb2_32b = 1;
                         } else {
@@ -778,8 +776,7 @@ do_alignment(unsigned long addr, unsigned int fsr, struct pt_regs *regs)
                         }
                 }
         } else
-                fault = __get_user(instr, (u32 *)instrptr);
-        set_fs(fs);
+                fault = probe_kernel_address(instrptr, instr);
 
         if (fault) {
                 type = TYPE_FAULT;
@@ -964,12 +961,14 @@ static int __init alignment_init(void)
                 return -ENOMEM;
 #endif
 
+#ifdef CONFIG_CPU_CP15
         if (cpu_is_v6_unaligned()) {
                 cr_alignment &= ~CR_A;
                 cr_no_alignment &= ~CR_A;
                 set_cr(cr_alignment);
                 ai_usermode = safe_usermode(ai_usermode, false);
         }
+#endif
 
         hook_fault_code(FAULT_CODE_ALIGNMENT, do_alignment, SIGBUS, BUS_ADRALN,
                         "alignment exception");