selftests/vm/compaction_test: fix write to restore nr_hugepages

[cascardo/linux.git] / tools / testing / selftests / vm / compaction_test.c

diff --git a/tools/testing/selftests/vm/compaction_test.c b/tools/testing/selftests/vm/compaction_test.c
index 932ff57..00c4f65 100644 (file)
--- a/tools/testing/selftests/vm/compaction_test.c
+++ b/tools/testing/selftests/vm/compaction_test.c
@@ -136,7 +136,7 @@ int check_compaction(unsigned long mem_free, unsigned int hugepage_size)
        printf("No of huge pages allocated = %d\n",
               (atoi(nr_hugepages)));
 
-       if (write(fd, initial_nr_hugepages, sizeof(initial_nr_hugepages))
+       if (write(fd, initial_nr_hugepages, strlen(initial_nr_hugepages))
            != strlen(initial_nr_hugepages)) {
                perror("Failed to write to /proc/sys/vm/nr_hugepages\n");
                goto close_fd;