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authorZhang Yanfei <zhangyanfei@cn.fujitsu.com>2013-07-03 15:04:47 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2013-07-03 16:07:40 -0700
commitd82b1d85760a8344d06272da67f0684243235fac (patch)
tree6c34cf40cd173a85fbcd9c0e2df66200077f92e5
parent543cc115339baa44fbea877b3d8673aca652622f (diff)
mm, vmalloc: only call setup_vmalloc_vm() only in __get_vm_area_node()
Now for insert_vmalloc_vm, it only calls the two functions: - setup_vmalloc_vm: fill vm_struct and vmap_area instances - clear_vm_unlist: clear VM_UNLIST bit in vm_struct->flags So in __get_vm_area_node(), if VM_UNLIST bit unset in flags, that is the else branch here, we don't need to clear VM_UNLIST bit for vm->flags since this bit is obviously not set. That is to say, we could only call setup_vmalloc_vm instead of insert_vmalloc_vm here. And then we could even remove the if test here. Signed-off-by: Zhang Yanfei <zhangyanfei@cn.fujitsu.com> Acked-by: Joonsoo Kim <iamjoonsoo.kim@lge.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--mm/vmalloc.c11
1 files changed, 1 insertions, 10 deletions
diff --git a/mm/vmalloc.c b/mm/vmalloc.c
index b7259906a806..d23e70ec45ad 100644
--- a/mm/vmalloc.c
+++ b/mm/vmalloc.c
@@ -1367,16 +1367,7 @@ static struct vm_struct *__get_vm_area_node(unsigned long size,
return NULL;
}
- /*
- * When this function is called from __vmalloc_node_range,
- * we add VM_UNLIST flag to avoid accessing uninitialized
- * members of vm_struct such as pages and nr_pages fields.
- * They will be set later.
- */
- if (flags & VM_UNLIST)
- setup_vmalloc_vm(area, va, flags, caller);
- else
- insert_vmalloc_vm(area, va, flags, caller);
+ setup_vmalloc_vm(area, va, flags, caller);
return area;
}