diff options
Diffstat (limited to 'arch/loongarch/lib/copy_user.S')
| -rw-r--r-- | arch/loongarch/lib/copy_user.S | 28 |
1 files changed, 17 insertions, 11 deletions
diff --git a/arch/loongarch/lib/copy_user.S b/arch/loongarch/lib/copy_user.S index 095ce9181c6c..c7264b779f6e 100644 --- a/arch/loongarch/lib/copy_user.S +++ b/arch/loongarch/lib/copy_user.S @@ -13,11 +13,15 @@ #include <asm/unwind_hints.h> SYM_FUNC_START(__copy_user) +#ifdef CONFIG_32BIT + b __copy_user_generic +#else /* * Some CPUs support hardware unaligned access */ ALTERNATIVE "b __copy_user_generic", \ "b __copy_user_fast", CPU_FEATURE_UAL +#endif SYM_FUNC_END(__copy_user) EXPORT_SYMBOL(__copy_user) @@ -30,22 +34,23 @@ EXPORT_SYMBOL(__copy_user) * a2: n */ SYM_FUNC_START(__copy_user_generic) - beqz a2, 3f + beqz a2, 3f -1: ld.b t0, a1, 0 -2: st.b t0, a0, 0 - addi.d a0, a0, 1 - addi.d a1, a1, 1 - addi.d a2, a2, -1 - bgtz a2, 1b +1: ld.b t0, a1, 0 +2: st.b t0, a0, 0 + PTR_ADDI a0, a0, 1 + PTR_ADDI a1, a1, 1 + PTR_ADDI a2, a2, -1 + bgtz a2, 1b -3: move a0, a2 - jr ra +3: move a0, a2 + jr ra - _asm_extable 1b, 3b - _asm_extable 2b, 3b + _asm_extable 1b, 3b + _asm_extable 2b, 3b SYM_FUNC_END(__copy_user_generic) +#ifdef CONFIG_64BIT /* * unsigned long __copy_user_fast(void *to, const void *from, unsigned long n) * @@ -281,3 +286,4 @@ SYM_FUNC_START(__copy_user_fast) SYM_FUNC_END(__copy_user_fast) STACK_FRAME_NON_STANDARD __copy_user_fast +#endif |