mailing list of musl libc

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 #include <unistd.h>
#include <sys/mman.h>
#include "syscall.h"
#include "libc.h"

WEAK_PROVIDE_INT;
WEAK_PROVIDE_VOID;
weak_alias(__weak_dummy_int, __vm_lock);
weak_alias(__weak_dummy_void, __vm_unlock);

int __munmap(void *start, size_t len)
{
	int ret;
	__vm_lock(-1);
	ret = syscall(SYS_munmap, start, len);
	__vm_unlock();
	return ret;
}

weak_alias(__munmap, munmap);