mm/memcontrol.c: move comments for get_mctgt_type() to proper position
Move the comments for get_mctgt_type() to be before get_mctgt_type() implementation. Link: http://lkml.kernel.org/r/1463644638-7446-1-git-send-email-roy.qing.li@gmail.com Signed-off-by: Li RongQing <roy.qing.li@gmail.com> Acked-by: Michal Hocko <mhocko@suse.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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@ -4309,24 +4309,6 @@ static int mem_cgroup_do_precharge(unsigned long count)
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return 0;
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}
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/**
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* get_mctgt_type - get target type of moving charge
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* @vma: the vma the pte to be checked belongs
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* @addr: the address corresponding to the pte to be checked
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* @ptent: the pte to be checked
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* @target: the pointer the target page or swap ent will be stored(can be NULL)
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*
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* Returns
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* 0(MC_TARGET_NONE): if the pte is not a target for move charge.
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* 1(MC_TARGET_PAGE): if the page corresponding to this pte is a target for
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* move charge. if @target is not NULL, the page is stored in target->page
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* with extra refcnt got(Callers should handle it).
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* 2(MC_TARGET_SWAP): if the swap entry corresponding to this pte is a
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* target for charge migration. if @target is not NULL, the entry is stored
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* in target->ent.
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*
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* Called with pte lock held.
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*/
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union mc_target {
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struct page *page;
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swp_entry_t ent;
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@ -4515,6 +4497,25 @@ static int mem_cgroup_move_account(struct page *page,
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return ret;
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}
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/**
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* get_mctgt_type - get target type of moving charge
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* @vma: the vma the pte to be checked belongs
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* @addr: the address corresponding to the pte to be checked
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* @ptent: the pte to be checked
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* @target: the pointer the target page or swap ent will be stored(can be NULL)
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*
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* Returns
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* 0(MC_TARGET_NONE): if the pte is not a target for move charge.
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* 1(MC_TARGET_PAGE): if the page corresponding to this pte is a target for
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* move charge. if @target is not NULL, the page is stored in target->page
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* with extra refcnt got(Callers should handle it).
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* 2(MC_TARGET_SWAP): if the swap entry corresponding to this pte is a
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* target for charge migration. if @target is not NULL, the entry is stored
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* in target->ent.
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*
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* Called with pte lock held.
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*/
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static enum mc_target_type get_mctgt_type(struct vm_area_struct *vma,
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unsigned long addr, pte_t ptent, union mc_target *target)
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{
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