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authorLinus Torvalds <torvalds@linux-foundation.org>2012-05-10 15:17:24 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2012-05-10 15:17:24 -0700
commit7c283324da366a3e6ffaad4352a51a3c71fcae17 (patch)
treeb4d02c340a17ac5134889c4eec7dcd06d407e3ca /mm
parent9e5869f8d70d94850cf86163c57ba8d4daa29924 (diff)
parent17ff3c1fa4c7bd0c38d751715033023ebf32fc96 (diff)
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Merge branch 'akpm' (Andrew's patch-bomb)
Merge misc fixes from Andrew Morton. * emailed from Andrew Morton <akpm@linux-foundation.org>: (8 patches) MAINTAINERS: add maintainer for LED subsystem mm: nobootmem: fix sign extend problem in __free_pages_memory() drivers/leds: correct __devexit annotations memcg: free spare array to avoid memory leak namespaces, pid_ns: fix leakage on fork() failure hugetlb: prevent BUG_ON in hugetlb_fault() -> hugetlb_cow() mm: fix division by 0 in percpu_pagelist_fraction() proc/pid/pagemap: correctly report non-present ptes and holes between vmas
Diffstat (limited to 'mm')
-rw-r--r--mm/hugetlb.c1
-rw-r--r--mm/memcontrol.c6
-rw-r--r--mm/nobootmem.c3
-rw-r--r--mm/page_alloc.c4
4 files changed, 9 insertions, 5 deletions
diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index 5a16423a512..ae8f708e3d7 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -2498,7 +2498,6 @@ retry_avoidcopy:
if (outside_reserve) {
BUG_ON(huge_pte_none(pte));
if (unmap_ref_private(mm, vma, old_page, address)) {
- BUG_ON(page_count(old_page) != 1);
BUG_ON(huge_pte_none(pte));
spin_lock(&mm->page_table_lock);
ptep = huge_pte_offset(mm, address & huge_page_mask(h));
diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index 31ab9c3f017..b659260c56a 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -4507,6 +4507,12 @@ static void mem_cgroup_usage_unregister_event(struct cgroup *cgrp,
swap_buffers:
/* Swap primary and spare array */
thresholds->spare = thresholds->primary;
+ /* If all events are unregistered, free the spare array */
+ if (!new) {
+ kfree(thresholds->spare);
+ thresholds->spare = NULL;
+ }
+
rcu_assign_pointer(thresholds->primary, new);
/* To be sure that nobody uses thresholds */
diff --git a/mm/nobootmem.c b/mm/nobootmem.c
index e53bb8a256b..1983fb1c702 100644
--- a/mm/nobootmem.c
+++ b/mm/nobootmem.c
@@ -82,8 +82,7 @@ void __init free_bootmem_late(unsigned long addr, unsigned long size)
static void __init __free_pages_memory(unsigned long start, unsigned long end)
{
- int i;
- unsigned long start_aligned, end_aligned;
+ unsigned long i, start_aligned, end_aligned;
int order = ilog2(BITS_PER_LONG);
start_aligned = (start + (BITS_PER_LONG - 1)) & ~(BITS_PER_LONG - 1);
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index a712fb9e04c..b21b3db15a7 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -105,7 +105,7 @@ unsigned long totalreserve_pages __read_mostly;
*/
unsigned long dirty_balance_reserve __read_mostly;
-int percpu_pagelist_fraction;
+int percpu_pagelist_fraction = 8;
gfp_t gfp_allowed_mask __read_mostly = GFP_BOOT_MASK;
#ifdef CONFIG_PM_SLEEP
@@ -5203,7 +5203,7 @@ int percpu_pagelist_fraction_sysctl_handler(ctl_table *table, int write,
int ret;
ret = proc_dointvec_minmax(table, write, buffer, length, ppos);
- if (!write || (ret == -EINVAL))
+ if (!write || (ret < 0))
return ret;
for_each_populated_zone(zone) {
for_each_possible_cpu(cpu) {