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mm: fix get_mctgt_type() kernel-doc
Convert the return values to an ReST list and tidy up the wording while I'm touching it. [akpm@linux-foundation.org: changes suggested by Randy] [willy@infradead.org: another change suggested by Randy] Link: https://lkml.kernel.org/r/ZOUZtZizeQG7PcsM@casper.infradead.org Link: https://lkml.kernel.org/r/20230818200630.2719595-3-willy@infradead.org Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org> Reviewed-by: Randy Dunlap <rdunlap@infradead.org> Acked-by: Mike Rapoport (IBM) <rppt@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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@ -5850,25 +5850,20 @@ out:
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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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* 3(MC_TARGET_DEVICE): like MC_TARGET_PAGE but page is device memory and
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* thus not on the lru.
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* For now we such page is charge like a regular page would be as for all
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* intent and purposes it is just special memory taking the place of a
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* regular page.
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*
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* See Documentations/vm/hmm.txt and include/linux/hmm.h
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*
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* Called with pte lock held.
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* Context: Called with pte lock held.
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* Return:
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* * MC_TARGET_NONE - If the pte is not a target for move charge.
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* * 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 taken (Caller should release it).
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* * 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
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* stored in target->ent.
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* * MC_TARGET_DEVICE - Like MC_TARGET_PAGE but page is device memory and
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* thus not on the lru. For now such page is charged like a regular page
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* would be as it is just special memory taking the place of a regular page.
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* See Documentations/vm/hmm.txt and include/linux/hmm.h
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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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