From d82b1d85760a8344d06272da67f0684243235fac Mon Sep 17 00:00:00 2001 From: Zhang Yanfei Date: Wed, 3 Jul 2013 15:04:47 -0700 Subject: [PATCH] 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 Acked-by: Joonsoo Kim Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- mm/vmalloc.c | 11 +---------- 1 file changed, 1 insertion(+), 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; } -- 2.20.1