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authorLinus Torvalds <torvalds@linux-foundation.org>2022-04-08 14:31:41 -1000
committerLinus Torvalds <torvalds@linux-foundation.org>2022-04-08 14:31:41 -1000
commit911b2b95168c7790ed5ea2703d804086c03088df (patch)
tree221e4fa69720af910218cb676bf71d99ec4dedae /mm
parent1a3b1bba7c7a5eb8a11513cf88427cb9d77bc60a (diff)
parent4071a1b9e24ee394b7492bff7542707ee9ad986d (diff)
Merge branch 'akpm' (patches from Andrew)
Merge fixes from Andrew Morton: "9 patches. Subsystems affected by this patch series: mm (migration, highmem, sparsemem, mremap, mempolicy, and memcg), lz4, mailmap, and MAINTAINERS" * emailed patches from Andrew Morton <akpm@linux-foundation.org>: MAINTAINERS: add Tom as clang reviewer mm/list_lru.c: revert "mm/list_lru: optimize memcg_reparent_list_lru_node()" mailmap: update Vasily Averin's email address mm/mempolicy: fix mpol_new leak in shared_policy_replace mmmremap.c: avoid pointless invalidate_range_start/end on mremap(old_size=0) mm/sparsemem: fix 'mem_section' will never be NULL gcc 12 warning lz4: fix LZ4_decompress_safe_partial read out of bound highmem: fix checks in __kmap_local_sched_{in,out} mm: migrate: use thp_order instead of HPAGE_PMD_ORDER for new page allocation.
Diffstat (limited to 'mm')
-rw-r--r--mm/highmem.c4
-rw-r--r--mm/list_lru.c6
-rw-r--r--mm/mempolicy.c1
-rw-r--r--mm/mremap.c3
4 files changed, 6 insertions, 8 deletions
diff --git a/mm/highmem.c b/mm/highmem.c
index 0cc0c4da7ed9..1a692997fac4 100644
--- a/mm/highmem.c
+++ b/mm/highmem.c
@@ -624,7 +624,7 @@ void __kmap_local_sched_out(void)
/* With debug all even slots are unmapped and act as guard */
if (IS_ENABLED(CONFIG_DEBUG_KMAP_LOCAL) && !(i & 0x01)) {
- WARN_ON_ONCE(!pte_none(pteval));
+ WARN_ON_ONCE(pte_val(pteval) != 0);
continue;
}
if (WARN_ON_ONCE(pte_none(pteval)))
@@ -661,7 +661,7 @@ void __kmap_local_sched_in(void)
/* With debug all even slots are unmapped and act as guard */
if (IS_ENABLED(CONFIG_DEBUG_KMAP_LOCAL) && !(i & 0x01)) {
- WARN_ON_ONCE(!pte_none(pteval));
+ WARN_ON_ONCE(pte_val(pteval) != 0);
continue;
}
if (WARN_ON_ONCE(pte_none(pteval)))
diff --git a/mm/list_lru.c b/mm/list_lru.c
index c669d87001a6..ba76428ceece 100644
--- a/mm/list_lru.c
+++ b/mm/list_lru.c
@@ -395,12 +395,6 @@ static void memcg_reparent_list_lru_node(struct list_lru *lru, int nid,
struct list_lru_one *src, *dst;
/*
- * If there is no lru entry in this nlru, we can skip it immediately.
- */
- if (!READ_ONCE(nlru->nr_items))
- return;
-
- /*
* Since list_lru_{add,del} may be called under an IRQ-safe lock,
* we have to use IRQ-safe primitives here to avoid deadlock.
*/
diff --git a/mm/mempolicy.c b/mm/mempolicy.c
index 649bd3be8682..8c74107a2b15 100644
--- a/mm/mempolicy.c
+++ b/mm/mempolicy.c
@@ -2743,6 +2743,7 @@ alloc_new:
mpol_new = kmem_cache_alloc(policy_cache, GFP_KERNEL);
if (!mpol_new)
goto err_out;
+ atomic_set(&mpol_new->refcnt, 1);
goto restart;
}
diff --git a/mm/mremap.c b/mm/mremap.c
index 9d76da79594d..303d3290b938 100644
--- a/mm/mremap.c
+++ b/mm/mremap.c
@@ -486,6 +486,9 @@ unsigned long move_page_tables(struct vm_area_struct *vma,
pmd_t *old_pmd, *new_pmd;
pud_t *old_pud, *new_pud;
+ if (!len)
+ return 0;
+
old_end = old_addr + len;
flush_cache_range(vma, old_addr, old_end);