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author | James Morris <jmorris@namei.org> | 2011-06-30 18:43:56 +1000 |
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committer | James Morris <jmorris@namei.org> | 2011-06-30 18:43:56 +1000 |
commit | 5b944a71a192977c1c018bbcfa0c52dca48e2368 (patch) | |
tree | 9f234c4a93bb28890ad086c846d2bf0b35f7f7ae /mm/ksm.c | |
parent | 0e4ae0e0dec634b2ae53ac57d14141b140467dbe (diff) | |
parent | c017d0d1351f916c0ced3f358afc491fdcf490b4 (diff) | |
download | op-kernel-dev-5b944a71a192977c1c018bbcfa0c52dca48e2368.zip op-kernel-dev-5b944a71a192977c1c018bbcfa0c52dca48e2368.tar.gz |
Merge branch 'linus' into next
Diffstat (limited to 'mm/ksm.c')
-rw-r--r-- | mm/ksm.c | 6 |
1 files changed, 6 insertions, 0 deletions
@@ -1302,6 +1302,12 @@ static struct rmap_item *scan_get_next_rmap_item(struct page **page) slot = list_entry(slot->mm_list.next, struct mm_slot, mm_list); ksm_scan.mm_slot = slot; spin_unlock(&ksm_mmlist_lock); + /* + * Although we tested list_empty() above, a racing __ksm_exit + * of the last mm on the list may have removed it since then. + */ + if (slot == &ksm_mm_head) + return NULL; next_mm: ksm_scan.address = 0; ksm_scan.rmap_list = &slot->rmap_list; |