x86: drop dummy input from alternative_{input,io}()

We don't need the claimed API compatibility. No change in generated
code.

Signed-off-by: Jan Beulich <jbeulich@suse.com>
Reviewed-by: Andrew Cooper <andrew.cooper3@citrix.com>

diff --git a/xen/include/asm-x86/alternative.h b/xen/include/asm-x86/alternative.h
index 7ddbd76b4747df372c753c68116430ec16649717..7d1135437eb79f9583a441eb9a583221a3caaf51 100644 (file)
--- a/xen/include/asm-x86/alternative.h
+++ b/xen/include/asm-x86/alternative.h
@@ -83,16 +83,15 @@ extern void alternative_instructions(void);
  * Best is to use constraints that are fixed size (like (%1) ... "r")
  * If you use variable sized constraints like "m" or "g" in the
  * replacement make sure to pad to the worst case length.
- * Leaving an unused argument 0 to keep API compatibility.
  */
 #define alternative_input(oldinstr, newinstr, feature, input...)       \
        asm volatile (ALTERNATIVE(oldinstr, newinstr, feature)          \
-               : : "i" (0), ## input)
+                     : : input)
 
 /* Like alternative_input, but with a single output argument */
 #define alternative_io(oldinstr, newinstr, feature, output, input...)  \
        asm volatile (ALTERNATIVE(oldinstr, newinstr, feature)          \
-               : output : "i" (0), ## input)
+                     : output : input)
 
 /* Use this macro(s) if you need more than one output parameter. */
 #define ASM_OUTPUT2(a...) a