Clang's inline assembler implementation inists that an explicit
constant is used for "n", whereas "i" allows a variable that ends up
being a constant after optimization, which is what we need here.
ok?
Index: arch/powerpc/include/atomic.h
===================================================================
RCS file: /cvs/src/sys/arch/powerpc/include/atomic.h,v
retrieving revision 1.11
diff -u -p -r1.11 atomic.h
--- arch/powerpc/include/atomic.h 12 May 2017 08:47:48 -0000 1.11
+++ arch/powerpc/include/atomic.h 11 Jul 2019 11:40:48 -0000
@@ -246,7 +246,7 @@ _atomic_addic_int_nv(volatile unsigned i
" stwcx. %0, 0, %2 \n"
" bne- 1b \n"
: "=&r" (rv), "+m" (*p)
- : "r" (p), "n" (v)
+ : "r" (p), "i" (v)
: "cc", "xer");
return (rv);
@@ -265,7 +265,7 @@ _atomic_addic_long_nv(volatile unsigned
" stwcx. %0, 0, %2 \n"
" bne- 1b \n"
: "=&r" (rv), "+m" (*p)
- : "r" (p), "n" (v)
+ : "r" (p), "i" (v)
: "cc", "xer");
return (rv);
