missing: simplify memfd ifdeffery

diff --git a/src/shared/missing.h b/src/shared/missing.h
index 5b87e23eec311d6d34b3693de361a25a09c3055d..0cfb6fa4c3895e1740b78c0413b331fcc4792f2c 100644 (file)
--- a/src/shared/missing.h
+++ b/src/shared/missing.h
@@ -115,21 +115,15 @@ static inline int pivot_root(const char *new_root, const char *put_old) {
 }
 #endif
 
 }
 #endif
 

-#ifdef __x86_64__
-#  ifndef __NR_memfd_create
+#ifndef __NR_memfd_create
+#  if defined __x86_64__

 #    define __NR_memfd_create 319
 #    define __NR_memfd_create 319

-#  endif
-#elif defined __arm__
-#  ifndef __NR_memfd_create
+#  elif defined __arm__

 #    define __NR_memfd_create 385
 #    define __NR_memfd_create 385

-#  endif
-#elif defined _MIPS_SIM
-#  ifndef __NR_memfd_create
+#  elif defined _MIPS_SIM

 #    warning "__NR_memfd_create not yet defined for MIPS"
 #    define __NR_memfd_create 0xffffffff
 #    warning "__NR_memfd_create not yet defined for MIPS"
 #    define __NR_memfd_create 0xffffffff

-#  endif
-#else
-#  ifndef __NR_memfd_create
+#  else

 #    define __NR_memfd_create 356
 #  endif
 #endif
 #    define __NR_memfd_create 356
 #  endif
 #endif