diff options
Diffstat (limited to 'tools/testing/selftests/mm/hugetlb-madvise.c')
| -rw-r--r-- | tools/testing/selftests/mm/hugetlb-madvise.c | 9 |
1 files changed, 4 insertions, 5 deletions
diff --git a/tools/testing/selftests/mm/hugetlb-madvise.c b/tools/testing/selftests/mm/hugetlb-madvise.c index e74107185324..05d9d2805ae4 100644 --- a/tools/testing/selftests/mm/hugetlb-madvise.c +++ b/tools/testing/selftests/mm/hugetlb-madvise.c @@ -19,7 +19,7 @@ #include <sys/mman.h> #include <fcntl.h> #include "vm_util.h" -#include "../kselftest.h" +#include "kselftest.h" #define MIN_FREE_PAGES 20 #define NR_HUGE_PAGES 10 /* common number of pages to map/allocate */ @@ -47,14 +47,13 @@ void write_fault_pages(void *addr, unsigned long nr_pages) void read_fault_pages(void *addr, unsigned long nr_pages) { - volatile unsigned long dummy = 0; unsigned long i; for (i = 0; i < nr_pages; i++) { - dummy += *((unsigned long *)(addr + (i * huge_page_size))); - + unsigned long *addr2 = + ((unsigned long *)(addr + (i * huge_page_size))); /* Prevent the compiler from optimizing out the entire loop: */ - asm volatile("" : "+r" (dummy)); + FORCE_READ(*addr2); } } |