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| author | Thomas Zimmermann <tzimmermann@suse.de> | 2020-04-17 08:12:22 +0200 |
|---|---|---|
| committer | Thomas Zimmermann <tzimmermann@suse.de> | 2020-04-17 08:12:22 +0200 |
| commit | 08d99b2c23dfa84ca5b5e5c194062a0550888b71 (patch) | |
| tree | f4cf81ba52b375bbafd3b7ee2603b3a4cae7fe30 /mm/madvise.c | |
| parent | 13e3d94110d82e318d640d0980896d32e02ba4d6 (diff) | |
| parent | 8f3d9f354286745c751374f5f1fcafee6b3f3136 (diff) | |
Merge drm/drm-next into drm-misc-next
Backmerging required to pull topic/phy-compliance.
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Diffstat (limited to 'mm/madvise.c')
| -rw-r--r-- | mm/madvise.c | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/mm/madvise.c b/mm/madvise.c index 43b47d3fae02..4bb30ed6c8d2 100644 --- a/mm/madvise.c +++ b/mm/madvise.c @@ -335,12 +335,14 @@ static int madvise_cold_or_pageout_pte_range(pmd_t *pmd, } page = pmd_page(orig_pmd); + + /* Do not interfere with other mappings of this page */ + if (page_mapcount(page) != 1) + goto huge_unlock; + if (next - addr != HPAGE_PMD_SIZE) { int err; - if (page_mapcount(page) != 1) - goto huge_unlock; - get_page(page); spin_unlock(ptl); lock_page(page); @@ -426,6 +428,10 @@ regular_page: continue; } + /* Do not interfere with other mappings of this page */ + if (page_mapcount(page) != 1) + continue; + VM_BUG_ON_PAGE(PageTransCompound(page), page); if (pte_young(ptent)) { |