1 files changed, 2 insertions, 1 deletions

diff --git a/include/asm-x86_64/pda.h b/include/asm-x86_64/pda.h
index c2aac96ac323..5dadb201f769 100644
--- a/include/asm-x86_64/pda.h
+++ b/include/asm-x86_64/pda.h
@@ -49,7 +49,8 @@ extern struct x8664_pda _proxy_pda;
 
 #define pda_to_op(op,field,val) do { \
         typedef typeof(_proxy_pda.field) T__; \
-       switch (sizeof(_proxy_pda.field)) {              \
+        if (0) { T__ tmp__; tmp__ = (val); }  \
+        switch (sizeof(_proxy_pda.field)) {             \
 case 2: \
 asm(op "w %1,%%gs:%c2" : "+m" (_proxy_pda.field) : \
         "ri" ((T__)val),"i"(pda_offset(field))); break; \