diff options
Diffstat (limited to 'arch/arm/kernel/entry-armv.S')
-rw-r--r-- | arch/arm/kernel/entry-armv.S | 21 |
1 files changed, 12 insertions, 9 deletions
diff --git a/arch/arm/kernel/entry-armv.S b/arch/arm/kernel/entry-armv.S index 7ea5f01dfc7b..de4e33137901 100644 --- a/arch/arm/kernel/entry-armv.S +++ b/arch/arm/kernel/entry-armv.S | |||
@@ -634,6 +634,14 @@ ENTRY(__switch_to) | |||
634 | * purpose. | 634 | * purpose. |
635 | */ | 635 | */ |
636 | 636 | ||
637 | .macro usr_ret, reg | ||
638 | #ifdef CONFIG_ARM_THUMB | ||
639 | bx \reg | ||
640 | #else | ||
641 | mov pc, \reg | ||
642 | #endif | ||
643 | .endm | ||
644 | |||
637 | .align 5 | 645 | .align 5 |
638 | .globl __kuser_helper_start | 646 | .globl __kuser_helper_start |
639 | __kuser_helper_start: | 647 | __kuser_helper_start: |
@@ -675,7 +683,7 @@ __kuser_memory_barrier: @ 0xffff0fa0 | |||
675 | #if __LINUX_ARM_ARCH__ >= 6 && defined(CONFIG_SMP) | 683 | #if __LINUX_ARM_ARCH__ >= 6 && defined(CONFIG_SMP) |
676 | mcr p15, 0, r0, c7, c10, 5 @ dmb | 684 | mcr p15, 0, r0, c7, c10, 5 @ dmb |
677 | #endif | 685 | #endif |
678 | mov pc, lr | 686 | usr_ret lr |
679 | 687 | ||
680 | .align 5 | 688 | .align 5 |
681 | 689 | ||
@@ -778,7 +786,7 @@ __kuser_cmpxchg: @ 0xffff0fc0 | |||
778 | mov r0, #-1 | 786 | mov r0, #-1 |
779 | adds r0, r0, #0 | 787 | adds r0, r0, #0 |
780 | #endif | 788 | #endif |
781 | mov pc, lr | 789 | usr_ret lr |
782 | 790 | ||
783 | #else | 791 | #else |
784 | 792 | ||
@@ -792,7 +800,7 @@ __kuser_cmpxchg: @ 0xffff0fc0 | |||
792 | #ifdef CONFIG_SMP | 800 | #ifdef CONFIG_SMP |
793 | mcr p15, 0, r0, c7, c10, 5 @ dmb | 801 | mcr p15, 0, r0, c7, c10, 5 @ dmb |
794 | #endif | 802 | #endif |
795 | mov pc, lr | 803 | usr_ret lr |
796 | 804 | ||
797 | #endif | 805 | #endif |
798 | 806 | ||
@@ -834,16 +842,11 @@ __kuser_cmpxchg: @ 0xffff0fc0 | |||
834 | __kuser_get_tls: @ 0xffff0fe0 | 842 | __kuser_get_tls: @ 0xffff0fe0 |
835 | 843 | ||
836 | #if !defined(CONFIG_HAS_TLS_REG) && !defined(CONFIG_TLS_REG_EMUL) | 844 | #if !defined(CONFIG_HAS_TLS_REG) && !defined(CONFIG_TLS_REG_EMUL) |
837 | |||
838 | ldr r0, [pc, #(16 - 8)] @ TLS stored at 0xffff0ff0 | 845 | ldr r0, [pc, #(16 - 8)] @ TLS stored at 0xffff0ff0 |
839 | mov pc, lr | ||
840 | |||
841 | #else | 846 | #else |
842 | |||
843 | mrc p15, 0, r0, c13, c0, 3 @ read TLS register | 847 | mrc p15, 0, r0, c13, c0, 3 @ read TLS register |
844 | mov pc, lr | ||
845 | |||
846 | #endif | 848 | #endif |
849 | usr_ret lr | ||
847 | 850 | ||
848 | .rep 5 | 851 | .rep 5 |
849 | .word 0 @ pad up to __kuser_helper_version | 852 | .word 0 @ pad up to __kuser_helper_version |