xtensa: clean up assembly arguments in uaccess macros

Numeric assembly arguments are hard to understand and assembly code that
uses them is hard to modify. Use named arguments in __check_align_*,
__get_user_asm and __put_user_asm. Modify macro parameter names so that
they don't affect argument names. Use '+' constraint for the [err]
argument instead of having it as both input and output.

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>

diff --git a/arch/xtensa/include/asm/uaccess.h b/arch/xtensa/include/asm/uaccess.h
index f568c00..da4d354 100644 (file)
--- a/arch/xtensa/include/asm/uaccess.h
+++ b/arch/xtensa/include/asm/uaccess.h
@@ -132,14 +132,14 @@ do {                                                                      \
 #define __check_align_1  ""
 
 #define __check_align_2                                \
-       "   _bbci.l %3,  0, 1f          \n"     \
-       "   movi    %0, %4              \n"     \
+       "   _bbci.l %[addr], 0, 1f      \n"     \
+       "   movi    %[err], %[efault]   \n"     \
        "   _j      2f                  \n"
 
 #define __check_align_4                                \
-       "   _bbsi.l %3,  0, 0f          \n"     \
-       "   _bbci.l %3,  1, 1f          \n"     \
-       "0: movi    %0, %4              \n"     \
+       "   _bbsi.l %[addr], 0, 0f      \n"     \
+       "   _bbci.l %[addr], 1, 1f      \n"     \
+       "0: movi    %[err], %[efault]   \n"     \
        "   _j      2f                  \n"
 
 
@@ -151,24 +151,24 @@ do {                                                                      \
  * WARNING: If you modify this macro at all, verify that the
  * __check_align_* macros still work.
  */
-#define __put_user_asm(x, addr, err, align, insn, cb)  \
+#define __put_user_asm(x_, addr_, err_, align, insn, cb)\
 __asm__ __volatile__(                                  \
        __check_align_##align                           \
-       "1: "insn"  %2, %3, 0           \n"             \
+       "1: "insn"  %[x], %[addr], 0    \n"             \
        "2:                             \n"             \
        "   .section  .fixup,\"ax\"     \n"             \
        "   .align 4                    \n"             \
        "   .literal_position           \n"             \
        "5:                             \n"             \
-       "   movi   %1, 2b               \n"             \
-       "   movi   %0, %4               \n"             \
-       "   jx     %1                   \n"             \
+       "   movi   %[tmp], 2b           \n"             \
+       "   movi   %[err], %[efault]    \n"             \
+       "   jx     %[tmp]               \n"             \
        "   .previous                   \n"             \
        "   .section  __ex_table,\"a\"  \n"             \
        "   .long       1b, 5b          \n"             \
        "   .previous"                                  \
-       :"=r" (err), "=r" (cb)                          \
-       :"r" ((int)(x)), "r" (addr), "i" (-EFAULT), "0" (err))
+       :[err] "+r"(err_), [tmp] "=r"(cb)               \
+       :[x] "r"(x_), [addr] "r"(addr_), [efault] "i"(-EFAULT))
 
 #define __get_user_nocheck(x, ptr, size)                       \
 ({                                                             \
@@ -217,25 +217,25 @@ do {                                                                      \
  * WARNING: If you modify this macro at all, verify that the
  * __check_align_* macros still work.
  */
-#define __get_user_asm(x, addr, err, align, insn, cb) \
-__asm__ __volatile__(                  \
+#define __get_user_asm(x_, addr_, err_, align, insn, cb) \
+__asm__ __volatile__(                          \
        __check_align_##align                   \
-       "1: "insn"  %2, %3, 0           \n"     \
+       "1: "insn"  %[x], %[addr], 0    \n"     \
        "2:                             \n"     \
        "   .section  .fixup,\"ax\"     \n"     \
        "   .align 4                    \n"     \
        "   .literal_position           \n"     \
        "5:                             \n"     \
-       "   movi   %1, 2b               \n"     \
-       "   movi   %2, 0                \n"     \
-       "   movi   %0, %4               \n"     \
-       "   jx     %1                   \n"     \
+       "   movi   %[tmp], 2b           \n"     \
+       "   movi   %[x], 0              \n"     \
+       "   movi   %[err], %[efault]    \n"     \
+       "   jx     %[tmp]               \n"     \
        "   .previous                   \n"     \
        "   .section  __ex_table,\"a\"  \n"     \
        "   .long       1b, 5b          \n"     \
        "   .previous"                          \
-       :"=r" (err), "=r" (cb), "=r" (x)        \
-       :"r" (addr), "i" (-EFAULT), "0" (err))
+       :[err] "+r"(err_), [tmp] "=r"(cb), [x] "=r"(x_)\
+       :[addr] "r"(addr_), [efault] "i"(-EFAULT))
 
 
 /*