On Fri, May 05, 2017 at 04:00:29PM -0700, Andi Kleen wrote:
SNIP
> +static struct srcfile *find_srcfile(char *fn)
> +{
> + struct stat st;
> + struct srcfile *h;
> + int fd;
> + unsigned long ps, sz;
> + bool first = true;
> +
> + list_for_each_entry (h, &srcfile_list, nd) {
> + if (!strcmp(fn, h->fn)) {
> + if (!first) {
> + /* Move to front */
> + list_del(&h->nd);
> + list_add(&h->nd, &srcfile_list);
> + }
> + return h;
> + }
> + first = false;
> + }
> +
> + /* Only prune if there is more than one entry */
> + while (map_total_sz > MAXSRCCACHE &&
> + srcfile_list.next != &srcfile_list) {
> + assert(!list_empty(&srcfile_list));
> + h = list_entry(srcfile_list.prev, struct srcfile, nd);
> + free_srcfile(h);
> + }
> +
> + fd = open(fn, O_RDONLY);
> + if (fd < 0 || fstat(fd, &st) < 0) {
> + pr_debug("cannot open source file %s\n", fn);
> + return NULL;
> + }
> +
> + h = malloc(sizeof(struct srcfile));
> + if (!h)
> + return NULL;
> +
> + h->fn = strdup(fn);
> + if (!h->fn)
> + goto out_h;
> +
> + h->maplen = st.st_size;
> + ps = sysconf(_SC_PAGE_SIZE);
we have global page_size
jirka
