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| author | Daniel Vetter <daniel.vetter@ffwll.ch> | 2017-10-03 11:09:16 +0200 |
|---|---|---|
| committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2017-10-03 11:09:16 +0200 |
| commit | 0d3c24e936feefeca854073ccb40613cd6eba9a9 (patch) | |
| tree | 1f675397b924846740b0931b066ddce6f3d7eb3d /lib/iov_iter.c | |
| parent | 1af0838de60e723cb02253ecc9b555c30f8f6a6f (diff) | |
| parent | ebec44a2456fbe5fe18aae88f6010f6878f0cb4a (diff) | |
Merge airlied/drm-next into drm-misc-next
Just catching up with upstream.
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Diffstat (limited to 'lib/iov_iter.c')
| -rw-r--r-- | lib/iov_iter.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/lib/iov_iter.c b/lib/iov_iter.c index 52c8dd6d8e82..1c1c06ddc20a 100644 --- a/lib/iov_iter.c +++ b/lib/iov_iter.c @@ -687,8 +687,10 @@ EXPORT_SYMBOL(_copy_from_iter_full_nocache); static inline bool page_copy_sane(struct page *page, size_t offset, size_t n) { - size_t v = n + offset; - if (likely(n <= v && v <= (PAGE_SIZE << compound_order(page)))) + struct page *head = compound_head(page); + size_t v = n + offset + page_address(page) - page_address(head); + + if (likely(n <= v && v <= (PAGE_SIZE << compound_order(head)))) return true; WARN_ON(1); return false; |