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| author | Takashi Iwai <tiwai@suse.de> | 2016-04-04 09:51:08 (GMT) |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2016-04-04 09:51:08 (GMT) |
| commit | a99e31512aa435e8391ba5f5e64abeac9c5f2f32 (patch) | |
| tree | 56bb9d9ccfe76520b672249757e25f686275b204 /arch/s390/mm/gup.c | |
| parent | 86c8dd7f4da3fb3f92fc5ab5144c971639d39745 (diff) | |
| parent | f03b24a851d32ca85dacab01785b24a7ee717d37 (diff) | |
| download | linux-a99e31512aa435e8391ba5f5e64abeac9c5f2f32.tar.xz | |
Merge branch 'for-linus' into for-next
Conflicts:
sound/hda/hdac_i915.c
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'arch/s390/mm/gup.c')
| -rw-r--r-- | arch/s390/mm/gup.c | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/arch/s390/mm/gup.c b/arch/s390/mm/gup.c index 49a1c84..a8a6765 100644 --- a/arch/s390/mm/gup.c +++ b/arch/s390/mm/gup.c @@ -20,9 +20,9 @@ static inline int gup_pte_range(pmd_t *pmdp, pmd_t pmd, unsigned long addr, unsigned long end, int write, struct page **pages, int *nr) { + struct page *head, *page; unsigned long mask; pte_t *ptep, pte; - struct page *page; mask = (write ? _PAGE_PROTECT : 0) | _PAGE_INVALID | _PAGE_SPECIAL; @@ -37,12 +37,14 @@ static inline int gup_pte_range(pmd_t *pmdp, pmd_t pmd, unsigned long addr, return 0; VM_BUG_ON(!pfn_valid(pte_pfn(pte))); page = pte_page(pte); - if (!page_cache_get_speculative(page)) + head = compound_head(page); + if (!page_cache_get_speculative(head)) return 0; if (unlikely(pte_val(pte) != pte_val(*ptep))) { - put_page(page); + put_page(head); return 0; } + VM_BUG_ON_PAGE(compound_head(page) != head, page); pages[*nr] = page; (*nr)++; |