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authorGayatri Kammela <gayatri.kammela@intel.com>2016-09-26 14:37:38 -0700
committerShaohua Li <shli@fb.com>2016-09-26 16:18:21 -0700
commit099b548c429217a8306adbd1552d326615c9b903 (patch)
tree5494f9f5ec8ff08f18ab1f5bfc935bbd7f792cc1 /lib
parent30c8946566f32493f7f1143437319c42c8a542e9 (diff)
downloadlinux-099b548c429217a8306adbd1552d326615c9b903.tar.bz2
raid6/test/test.c: bug fix: Specify aligned(alignment) attributes to the char arrays
Specifying the aligned attributes to the char data[NDISKS][PAGE_SIZE], char recovi[PAGE_SIZE] and char recovi[PAGE_SIZE] arrays, so that all malloc memory is page boundary aligned. Without these alignment attributes, the test causes a segfault in userspace when the NDISKS are changed to 4 from 16. The RAID stripes will be page aligned anyway, so we want to test what the kernel actually will execute. Cc: H. Peter Anvin <hpa@zytor.com> Cc: Yu-cheng Yu <yu-cheng.yu@intel.com> Signed-off-by: Gayatri Kammela <gayatri.kammela@intel.com> Reviewed-by: H. Peter Anvin <hpa@linux.intel.com> Signed-off-by: Shaohua Li <shli@fb.com>
Diffstat (limited to 'lib')
-rw-r--r--lib/raid6/test/test.c7
1 files changed, 4 insertions, 3 deletions
diff --git a/lib/raid6/test/test.c b/lib/raid6/test/test.c
index 3bebbabdb510..b07f4d8e6b03 100644
--- a/lib/raid6/test/test.c
+++ b/lib/raid6/test/test.c
@@ -21,12 +21,13 @@
#define NDISKS 16 /* Including P and Q */
-const char raid6_empty_zero_page[PAGE_SIZE] __attribute__((aligned(256)));
+const char raid6_empty_zero_page[PAGE_SIZE] __attribute__((aligned(PAGE_SIZE)));
struct raid6_calls raid6_call;
char *dataptrs[NDISKS];
-char data[NDISKS][PAGE_SIZE];
-char recovi[PAGE_SIZE], recovj[PAGE_SIZE];
+char data[NDISKS][PAGE_SIZE] __attribute__((aligned(PAGE_SIZE)));
+char recovi[PAGE_SIZE] __attribute__((aligned(PAGE_SIZE)));
+char recovj[PAGE_SIZE] __attribute__((aligned(PAGE_SIZE)));
static void makedata(int start, int stop)
{