From: Zbigniew Jędrzejewski-Szmek <zbyszek@in.waw.pl>
Date: Sat, 15 Aug 2020 16:54:18 +0000 (+0200)
Subject: missing_syscall: add forgotten check for __NR_get_mempolicy nonnegativity
X-Git-Tag: v247-rc1~419^2~2
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=0e68241138aa754fc05a4396e573946e55c4fa5d;p=thirdparty%2Fsystemd.git

missing_syscall: add forgotten check for __NR_get_mempolicy nonnegativity

We do it in other cases, we should here too.

Fixup for b070c7c0e13.
---

diff --git a/src/basic/missing_syscall.h b/src/basic/missing_syscall.h
index 41164ea7d0e..227c2121fad 100644
--- a/src/basic/missing_syscall.h
+++ b/src/basic/missing_syscall.h
@@ -515,7 +515,7 @@ static inline long missing_get_mempolicy(int *mode, unsigned long *nodemask,
                            unsigned long maxnode, void *addr,
                            unsigned long flags) {
         long i;
-#  ifdef __NR_get_mempolicy
+#  if defined __NR_get_mempolicy && __NR_get_mempolicy >= 0
         i = syscall(__NR_get_mempolicy, mode, nodemask, maxnode, addr, flags);
 #  else
         errno = ENOSYS;