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mm/madvise: pass return code of memory_failure() to userspace 

Currently the return value of memory_failure() is not passed to
userspace when madvise(MADV_HWPOISON) is used.  This is inconvenient for
test programs that want to know the result of error handling.  So let's
return it to the caller as we already do in the MADV_SOFT_OFFLINE case.

Signed-off-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Cc: Chen Gong <gong.chen@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Naoya Horiguchi 2016-03-15 14:56:36 -07:00 committed by Linus Torvalds
parent 5b3810e5c6
commit 23a003bfd2
1 changed files with 3 additions and 2 deletions
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mm/madvise.c
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@ -555,8 +555,9 @@ static int madvise_hwpoison(int bhv, unsigned long start, unsigned long end)
}
pr_info("Injecting memory failure for page %#lx at %#lx\n",
page_to_pfn(p), start);
/* Ignore return value for now */
memory_failure(page_to_pfn(p), 0, MF_COUNT_INCREASED);
ret = memory_failure(page_to_pfn(p), 0, MF_COUNT_INCREASED);
if (ret)
return ret;
}
return 0;
}