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| author | Zhang Yanfei <zhangyanfei@cn.fujitsu.com> | 2013-07-08 15:59:59 -0700 |
|---|---|---|
| committer | Moyster <oysterized@gmail.com> | 2019-05-02 21:04:57 +0200 |
| commit | b97c37901526d03a400714891946cb056a7993be (patch) | |
| tree | d150fa3bb3fff1dea07d12d701a3f6d720650d07 | |
| parent | 8969b98a0e2e427a99ce6a805961c740c05fe879 (diff) | |
| download | android_kernel_m2note-b97c37901526d03a400714891946cb056a7993be.tar.gz | |
mm/vmalloc.c: check VM_UNINITIALIZED flag in s_show instead of show_numa_info
We should check the VM_UNITIALIZED flag in s_show(). If this flag is
set, that said, the vm_struct is not fully initialized. So it is
unnecessary to try to show the information contained in vm_struct.
We checked this flag in show_numa_info(), but I think it's better to
check it earlier.
Signed-off-by: Zhang Yanfei <zhangyanfei@cn.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Change-Id: Ie017d760ee56525b456719f34a28234d5bc6045d
(cherry picked from commit 2f6fca496bc8c1352e28d4a017528bc26e4c713f)
| -rw-r--r-- | mm/vmalloc.c | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/mm/vmalloc.c b/mm/vmalloc.c index e10bc4a82..1870b1f7b 100644 --- a/mm/vmalloc.c +++ b/mm/vmalloc.c @@ -2606,11 +2606,6 @@ static void show_numa_info(struct seq_file *m, struct vm_struct *v) if (!counters) return; - /* Pair with smp_wmb() in clear_vm_uninitialized_flag() */ - smp_rmb(); - if (v->flags & VM_UNINITIALIZED) - return; - memset(counters, 0, nr_node_ids * sizeof(unsigned int)); for (nr = 0; nr < v->nr_pages; nr++) @@ -2639,6 +2634,11 @@ static int s_show(struct seq_file *m, void *p) v = va->vm; + /* Pair with smp_wmb() in clear_vm_uninitialized_flag() */ + smp_rmb(); + if (v->flags & VM_UNINITIALIZED) + return 0; + seq_printf(m, "0x%pK-0x%pK %7ld", v->addr, v->addr + v->size, v->size); |