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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>
This commit is contained in:
Matthew Wilcox (Oracle) 2023-08-18 21:06:28 +01:00 committed by Andrew Morton
parent 19134bc235
commit 853f62a304
1 changed files with 13 additions and 18 deletions
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31
mm/memcontrol.c
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@ -5850,25 +5850,20 @@ out:
* @ptent: the pte to be checked
* @target: the pointer the target page or swap ent will be stored(can be NULL)
*
* Returns
* 0(MC_TARGET_NONE): if the pte is not a target for move charge.
* 1(MC_TARGET_PAGE): if the page corresponding to this pte is a target for
* move charge. if @target is not NULL, the page is stored in target->page
* with extra refcnt got(Callers should handle it).
* 2(MC_TARGET_SWAP): if the swap entry corresponding to this pte is a
* target for charge migration. if @target is not NULL, the entry is stored
* in target->ent.
* 3(MC_TARGET_DEVICE): like MC_TARGET_PAGE but page is device memory and
* thus not on the lru.
* For now we such page is charge like a regular page would be as for all
* intent and purposes it is just special memory taking the place of a
* regular page.
*
* See Documentations/vm/hmm.txt and include/linux/hmm.h
*
* Called with pte lock held.
* Context: Called with pte lock held.
* Return:
* * MC_TARGET_NONE - If the pte is not a target for move charge.
* * MC_TARGET_PAGE - If the page corresponding to this pte is a target for
* move charge. If @target is not NULL, the page is stored in target->page
* with extra refcnt taken (Caller should release it).
* * MC_TARGET_SWAP - If the swap entry corresponding to this pte is a
* target for charge migration. If @target is not NULL, the entry is
* stored in target->ent.
* * MC_TARGET_DEVICE - Like MC_TARGET_PAGE but page is device memory and
* thus not on the lru. For now such page is charged like a regular page
* would be as it is just special memory taking the place of a regular page.
* See Documentations/vm/hmm.txt and include/linux/hmm.h
*/
static enum mc_target_type get_mctgt_type(struct vm_area_struct *vma,
unsigned long addr, pte_t ptent, union mc_target *target)
{