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| author | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-10-09 09:05:05 +0200 |
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| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-10-09 09:05:05 +0200 |
| commit | 9424e8b1fedbaff34df187fdb87f9a9cba2d0ff2 (patch) | |
| tree | 7a595ccc67ae0cd9a414383ff2f6ede291c7dc18 /mm/madvise.c | |
| parent | bccf1da3546cc7aeefadc63cd4356ab8dc04c1e3 (diff) | |
| parent | 8a5776a5f49812d29fe4b2d0a2d71675c3facf3f (diff) | |
| download | lwn-9424e8b1fedbaff34df187fdb87f9a9cba2d0ff2.tar.gz lwn-9424e8b1fedbaff34df187fdb87f9a9cba2d0ff2.zip | |
Merge 4.14-rc4 into tty-next
We want the tty/serial fixes in here as well.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'mm/madvise.c')
| -rw-r--r-- | mm/madvise.c | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/mm/madvise.c b/mm/madvise.c index 21261ff0466f..25bade36e9ca 100644 --- a/mm/madvise.c +++ b/mm/madvise.c @@ -625,18 +625,26 @@ static int madvise_inject_error(int behavior, { struct page *page; struct zone *zone; + unsigned int order; if (!capable(CAP_SYS_ADMIN)) return -EPERM; - for (; start < end; start += PAGE_SIZE << - compound_order(compound_head(page))) { + + for (; start < end; start += PAGE_SIZE << order) { int ret; ret = get_user_pages_fast(start, 1, 0, &page); if (ret != 1) return ret; + /* + * When soft offlining hugepages, after migrating the page + * we dissolve it, therefore in the second loop "page" will + * no longer be a compound page, and order will be 0. + */ + order = compound_order(compound_head(page)); + if (PageHWPoison(page)) { put_page(page); continue; |