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raid6/test/test.c: bug fix: Specify aligned(alignment) attributes to the char arrays

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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>
This commit is contained in:
Gayatri Kammela 2016-09-26 14:37:38 -07:00 committed by Shaohua Li
parent 30c8946566
commit 099b548c42
1 changed files with 4 additions and 3 deletions
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7
lib/raid6/test/test.c
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@ -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)
{