int update_futex(int fd, int active)
{
- size_t mmap_size = sysconf(_SC_PAGE_SIZE);
+ long page_size;
char *wait_shm_mmap;
int ret;
- wait_shm_mmap = mmap(NULL, mmap_size, PROT_READ | PROT_WRITE,
+ page_size = sysconf(_SC_PAGE_SIZE);
+ if (page_size < 0) {
+ goto error;
+ }
+ wait_shm_mmap = mmap(NULL, page_size, PROT_READ | PROT_WRITE,
MAP_SHARED, fd, 0);
if (wait_shm_mmap == MAP_FAILED) {
perror("mmap");
} else {
uatomic_set((int32_t *) wait_shm_mmap, 0);
}
- ret = munmap(wait_shm_mmap, mmap_size);
+ ret = munmap(wait_shm_mmap, page_size);
if (ret) {
perror("Error unmapping wait shm");
goto error;