The patch titled
Subject: mempolicy-convert-the-shared_policy-lock-to-a-rwlock-fix-2
has been added to the -mm tree. Its filename is
mempolicy-convert-the-shared_policy-lock-to-a-rwlock-fix-2.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mempolicy-convert-the-shared_policy-lock-to-a-rwlock-fix-2.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mempolicy-convert-the-shared_policy-lock-to-a-rwlock-fix-2.patch
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------------------------------------------------------
From: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Subject: mempolicy-convert-the-shared_policy-lock-to-a-rwlock-fix-2
tidy up code comments
Cc: "Aneesh Kumar K.V" <aneesh.kumar@xxxxxxxxxxxxxxxxxx>
Cc: David Rientjes <rientjes@xxxxxxxxxx>
Cc: Mel Gorman <mgorman@xxxxxxx>
Cc: Nadia Yvette Chambers <nyc@xxxxxxxxxxxxxx>
Cc: Naoya Horiguchi <n-horiguchi@xxxxxxxxxxxxx>
Cc: Nathan Zimmer <nzimmer@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/mempolicy.c | 12 ++++++++----
1 file changed, 8 insertions(+), 4 deletions(-)
diff -puN mm/mempolicy.c~mempolicy-convert-the-shared_policy-lock-to-a-rwlock-fix-2 mm/mempolicy.c
--- a/mm/mempolicy.c~mempolicy-convert-the-shared_policy-lock-to-a-rwlock-fix-2
+++ a/mm/mempolicy.c
@@ -2146,8 +2146,10 @@ bool __mpol_equal(struct mempolicy *a, s
* for any accesses to the tree.
*/
-/* lookup first element intersecting start-end */
-/* Caller holds sp->lock */
+/*
+ * lookup first element intersecting start-end. Caller holds sp->lock for
+ * reading or for writing
+ */
static struct sp_node *
sp_lookup(struct shared_policy *sp, unsigned long start, unsigned long end)
{
@@ -2178,8 +2180,10 @@ sp_lookup(struct shared_policy *sp, unsi
return rb_entry(n, struct sp_node, nd);
}
-/* Insert a new shared policy into the list. */
-/* Caller holds the write of sp->lock */
+/*
+ * Insert a new shared policy into the list. Caller holds sp->lock for
+ * writing.
+ */
static void sp_insert(struct shared_policy *sp, struct sp_node *new)
{
struct rb_node **p = &sp->root.rb_node;
_
Patches currently in -mm which might be from akpm@xxxxxxxxxxxxxxxxxxxx are
arch-alpha-kernel-systblss-remove-debug-check.patch
drivers-gpu-drm-i915-intel_spritec-fix-build.patch
drivers-gpu-drm-i915-intel_tvc-fix-build.patch
ncpfs-dont-allow-negative-timeouts-fix.patch
mm.patch
slub-optimize-bulk-slowpath-free-by-detached-freelist-fix.patch
account-certain-kmem-allocations-to-memcg-checkpatch-fixes.patch
mm-mmapc-remove-redundant-local-variables-for-may_expand_vm-fix.patch
include-define-__phys_to_pfn-as-phys_pfn-fix.patch
mempolicy-convert-the-shared_policy-lock-to-a-rwlock-fix.patch
mempolicy-convert-the-shared_policy-lock-to-a-rwlock-fix-2.patch
page-flags-define-pg_locked-behavior-on-compound-pages-fix.patch
mm-rework-mapcount-accounting-to-enable-4k-mapping-of-thps-fix.patch
mm-hwpoison-adjust-for-new-thp-refcounting-fix.patch
mm-prepare-page_referenced-and-page_idle-to-new-thp-refcounting-checkpatch-fixes.patch
mm-increase-swap_cluster_max-to-batch-tlb-flushes-fix-fix.patch
do_shared_fault-check-that-mmap_sem-is-held.patch
kernel-forkc-export-kernel_thread-to-modules.patch
slab-leaks3-default-y.patch
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