Merge branch 'akpm' (patches from Andrew)

Merge misc fixes from Andrew Morton:
 "The usual shower of hotfixes.

  Chris's memcg patches aren't actually fixes - they're mature but a few
  niggling review issues were late to arrive.

  The ocfs2 fixes are quite old - those took some time to get reviewer
  attention.

  Subsystems affected by this patch series: ocfs2, hotfixes, mm/memcg,
  mm/slab-generic"

* emailed patches from Andrew Morton <akpm@linux-foundation.org>:
  mm, sl[aou]b: guarantee natural alignment for kmalloc(power-of-two)
  mm, sl[ou]b: improve memory accounting
  mm, memcg: make scan aggression always exclude protection
  mm, memcg: make memory.emin the baseline for utilisation determination
  mm, memcg: proportional memory.{low,min} reclaim
  mm/vmpressure.c: fix a signedness bug in vmpressure_register_event()
  mm/page_alloc.c: fix a crash in free_pages_prepare()
  mm/z3fold.c: claim page in the beginning of free
  kernel/sysctl.c: do not override max_threads provided by userspace
  memcg: only record foreign writebacks with dirty pages when memcg is not disabled
  mm: fix -Wmissing-prototypes warnings
  writeback: fix use-after-free in finish_writeback_work()
  mm/memremap: drop unused SECTION_SIZE and SECTION_MASK
  panic: ensure preemption is disabled during panic()
  fs: ocfs2: fix a possible null-pointer dereference in ocfs2_info_scan_inode_alloc()
  fs: ocfs2: fix a possible null-pointer dereference in ocfs2_write_end_nolock()
  fs: ocfs2: fix possible null-pointer dereferences in ocfs2_xa_prepare_entry()
  ocfs2: clear zero in unaligned direct IO

2 files changed, 3 insertions, 2 deletions

diff --git a/kernel/fork.c b/kernel/fork.c
index 1f6c45f6a734..bcdf53125210 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -2925,7 +2925,7 @@ int sysctl_max_threads(struct ctl_table *table, int write,
         struct ctl_table t;
         int ret;
         int threads = max_threads;
-        int min = MIN_THREADS;
+        int min = 1;
         int max = MAX_THREADS;
 
         t = *table;
@@ -2937,7 +2937,7 @@ int sysctl_max_threads(struct ctl_table *table, int write,
         if (ret || !write)
                 return ret;
 
-        set_max_threads(threads);
+        max_threads = threads;
 
         return 0;
 }
diff --git a/kernel/panic.c b/kernel/panic.c
index 47e8ebccc22b..f470a038b05b 100644
--- a/kernel/panic.c
+++ b/kernel/panic.c
@@ -180,6 +180,7 @@ void panic(const char *fmt, ...)
          * after setting panic_cpu) from invoking panic() again.
          */
         local_irq_disable();
+        preempt_disable_notrace();
 
         /*
          * It's possible to come here directly from a panic-assertion and