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-rw-r--r--src/mman/posix_madvise.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/src/mman/posix_madvise.c b/src/mman/posix_madvise.c
index 4727ad75..b76f1a75 100644
--- a/src/mman/posix_madvise.c
+++ b/src/mman/posix_madvise.c
@@ -1,6 +1,8 @@
+#define _GNU_SOURCE
#include <sys/mman.h>
int posix_madvise(void *addr, size_t len, int advice)
{
- return 0;
+ if (advice == MADV_DONTNEED) return 0;
+ return -__syscall(SYS_madvise, addr, len, advice);
}