summaryrefslogtreecommitdiffstats
path: root/tools/testing/selftests/bpf/bpf_util.h
diff options
context:
space:
mode:
authorDaniel Vetter <daniel.vetter@ffwll.ch>2019-02-20 20:51:33 +0100
committerDaniel Vetter <daniel.vetter@ffwll.ch>2019-02-20 20:51:33 +0100
commit4509209f8bfe158403a29d713bd3b2cb8fc2b534 (patch)
tree952962ad15753569bce64df01410217f900e06aa /tools/testing/selftests/bpf/bpf_util.h
parent35c0272502cca0a1b461d310c23aac94a503983d (diff)
parent32ea33a044842ae6c5fc7e33426e0a7bd50f8801 (diff)
downloadlinux-4509209f8bfe158403a29d713bd3b2cb8fc2b534.tar.bz2
Pull in char-misc-next from Greg
We need 32ea33a04484 ("mei: bus: export to_mei_cl_device for mei client devices drivers") for the mei-hdcp patches. References: https://lkml.org/lkml/2019/2/19/356 Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Diffstat (limited to 'tools/testing/selftests/bpf/bpf_util.h')
-rw-r--r--tools/testing/selftests/bpf/bpf_util.h30
1 files changed, 20 insertions, 10 deletions
diff --git a/tools/testing/selftests/bpf/bpf_util.h b/tools/testing/selftests/bpf/bpf_util.h
index 315a44fa32af..84fd6f1bf33e 100644
--- a/tools/testing/selftests/bpf/bpf_util.h
+++ b/tools/testing/selftests/bpf/bpf_util.h
@@ -13,7 +13,7 @@ static inline unsigned int bpf_num_possible_cpus(void)
unsigned int start, end, possible_cpus = 0;
char buff[128];
FILE *fp;
- int n;
+ int len, n, i, j = 0;
fp = fopen(fcpu, "r");
if (!fp) {
@@ -21,17 +21,27 @@ static inline unsigned int bpf_num_possible_cpus(void)
exit(1);
}
- while (fgets(buff, sizeof(buff), fp)) {
- n = sscanf(buff, "%u-%u", &start, &end);
- if (n == 0) {
- printf("Failed to retrieve # possible CPUs!\n");
- exit(1);
- } else if (n == 1) {
- end = start;
+ if (!fgets(buff, sizeof(buff), fp)) {
+ printf("Failed to read %s!\n", fcpu);
+ exit(1);
+ }
+
+ len = strlen(buff);
+ for (i = 0; i <= len; i++) {
+ if (buff[i] == ',' || buff[i] == '\0') {
+ buff[i] = '\0';
+ n = sscanf(&buff[j], "%u-%u", &start, &end);
+ if (n <= 0) {
+ printf("Failed to retrieve # possible CPUs!\n");
+ exit(1);
+ } else if (n == 1) {
+ end = start;
+ }
+ possible_cpus += end - start + 1;
+ j = i + 1;
}
- possible_cpus = start == 0 ? end + 1 : 0;
- break;
}
+
fclose(fp);
return possible_cpus;