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authorLinus Torvalds <torvalds@linux-foundation.org>2018-05-12 04:04:12 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2018-05-12 04:04:12 +0300
commitf0ab773f5c96c29a5227234c4b5a820f5591b74d (patch)
treea98d6190989c2190e522b8d1966727125bcbcbb3 /kernel
parent4bc871984f7cb5b2dec3ae64b570cb02f9ce2227 (diff)
parent2075b16e32c26e4031b9fd3cbe26c54676a8fcb5 (diff)
downloadlinux-f0ab773f5c96c29a5227234c4b5a820f5591b74d.tar.xz
Merge branch 'akpm' (patches from Andrew)
Merge misc fixes from Andrew Morton: "13 fixes" * emailed patches from Andrew Morton <akpm@linux-foundation.org>: rbtree: include rcu.h scripts/faddr2line: fix error when addr2line output contains discriminator ocfs2: take inode cluster lock before moving reflinked inode from orphan dir mm, oom: fix concurrent munlock and oom reaper unmap, v3 mm: migrate: fix double call of radix_tree_replace_slot() proc/kcore: don't bounds check against address 0 mm: don't show nr_indirectly_reclaimable in /proc/vmstat mm: sections are not offlined during memory hotremove z3fold: fix reclaim lock-ups init: fix false positives in W+X checking lib/find_bit_benchmark.c: avoid soft lockup in test_find_first_bit() KASAN: prohibit KASAN+STRUCTLEAK combination MAINTAINERS: update Shuah's email address
Diffstat (limited to 'kernel')
-rw-r--r--kernel/module.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/kernel/module.c b/kernel/module.c
index ce8066b88178..c9bea7f2b43e 100644
--- a/kernel/module.c
+++ b/kernel/module.c
@@ -3517,6 +3517,11 @@ static noinline int do_init_module(struct module *mod)
* walking this with preempt disabled. In all the failure paths, we
* call synchronize_sched(), but we don't want to slow down the success
* path, so use actual RCU here.
+ * Note that module_alloc() on most architectures creates W+X page
+ * mappings which won't be cleaned up until do_free_init() runs. Any
+ * code such as mark_rodata_ro() which depends on those mappings to
+ * be cleaned up needs to sync with the queued work - ie
+ * rcu_barrier_sched()
*/
call_rcu_sched(&freeinit->rcu, do_free_init);
mutex_unlock(&module_mutex);