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-rw-r--r--linux_dep.h12
1 files changed, 4 insertions, 8 deletions
diff --git a/linux_dep.h b/linux_dep.h
index 3a41e42..240f50a 100644
--- a/linux_dep.h
+++ b/linux_dep.h
@@ -127,22 +127,18 @@ struct tcp_info_linux {
#include <linux/close_range.h>
-#ifdef CLOSE_RANGE_UNSHARE /* Linux kernel >= 5.9 */
/* glibc < 2.34 and musl as of 1.2.5 need these */
#ifndef SYS_close_range
#define SYS_close_range 436
#endif
+#ifndef CLOSE_RANGE_UNSHARE /* Linux kernel < 5.9 */
+#define CLOSE_RANGE_UNSHARE (1U << 1)
+#endif
+
__attribute__ ((weak))
/* cppcheck-suppress funcArgNamesDifferent */
int close_range(unsigned int first, unsigned int last, int flags) {
return syscall(SYS_close_range, first, last, flags);
}
-#else
-/* No reasonable fallback option */
-/* cppcheck-suppress funcArgNamesDifferent */
-int close_range(unsigned int first, unsigned int last, int flags) {
- return 0;
-}
-#endif
#endif /* LINUX_DEP_H */