diff options
Diffstat (limited to 'arch/loongarch/lib/clear_user.S')
| -rw-r--r-- | arch/loongarch/lib/clear_user.S | 22 |
1 files changed, 14 insertions, 8 deletions
diff --git a/arch/loongarch/lib/clear_user.S b/arch/loongarch/lib/clear_user.S index 7a0db643b286..58c667dde882 100644 --- a/arch/loongarch/lib/clear_user.S +++ b/arch/loongarch/lib/clear_user.S @@ -13,11 +13,15 @@ #include <asm/unwind_hints.h> SYM_FUNC_START(__clear_user) +#ifdef CONFIG_32BIT + b __clear_user_generic +#else /* * Some CPUs support hardware unaligned access */ ALTERNATIVE "b __clear_user_generic", \ "b __clear_user_fast", CPU_FEATURE_UAL +#endif SYM_FUNC_END(__clear_user) EXPORT_SYMBOL(__clear_user) @@ -29,19 +33,20 @@ EXPORT_SYMBOL(__clear_user) * a1: size */ SYM_FUNC_START(__clear_user_generic) - beqz a1, 2f + beqz a1, 2f -1: st.b zero, a0, 0 - addi.d a0, a0, 1 - addi.d a1, a1, -1 - bgtz a1, 1b +1: st.b zero, a0, 0 + PTR_ADDI a0, a0, 1 + PTR_ADDI a1, a1, -1 + bgtz a1, 1b -2: move a0, a1 - jr ra +2: move a0, a1 + jr ra - _asm_extable 1b, 2b + _asm_extable 1b, 2b SYM_FUNC_END(__clear_user_generic) +#ifdef CONFIG_64BIT /* * unsigned long __clear_user_fast(void *addr, unsigned long size) * @@ -207,3 +212,4 @@ SYM_FUNC_START(__clear_user_fast) SYM_FUNC_END(__clear_user_fast) STACK_FRAME_NON_STANDARD __clear_user_fast +#endif |