From: Zi Yan <ziy@nvidia.com>
To: Matthew Wilcox <willy@infradead.org>
Cc: Vlastimil Babka <vbabka@suse.cz>,
Andrew Morton <akpm@linux-foundation.org>,
Christoph Lameter <cl@gentwo.org>,
David Rientjes <rientjes@google.com>,
Roman Gushchin <roman.gushchin@linux.dev>,
Harry Yoo <harry.yoo@oracle.com>,
linux-mm@kvack.org
Subject: Re: [PATCH 05/22] mm: Constify compound_order() and page_size()
Date: Sat, 30 Aug 2025 21:06:30 -0400 [thread overview]
Message-ID: <1AF80C9A-7CA2-47D6-99ED-31529E6E5215@nvidia.com> (raw)
In-Reply-To: <aLIvT4HcHUSnwP2U@casper.infradead.org>
On 29 Aug 2025, at 18:53, Matthew Wilcox wrote:
> On Fri, Aug 29, 2025 at 04:42:43PM -0400, Zi Yan wrote:
>> On 29 Aug 2025, at 11:47, Matthew Wilcox (Oracle) wrote:
>>> -static inline unsigned int compound_order(struct page *page)
>>> +static inline unsigned int compound_order(const struct page *page)
>>> {
>>> - struct folio *folio = (struct folio *)page;
>>> + const struct folio *folio = (struct folio *)page;
>>
>> Why not
>> const struct folio *folio = (const struct folio *)page;
>> ?
>>
>> page is already a const pointer.
>
> It really doesn't matter; it's not going to affect code generation at
> all. We could cast it to void * or const void * instead.
Yes, there is no impact on code generation. Just a comment, no need to
change the code.
--
Best Regards,
Yan, Zi
next prev parent reply other threads:[~2025-08-31 1:06 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-08-29 15:47 [PATCH 00/22] Prepare slab for memdescs Matthew Wilcox (Oracle)
2025-08-29 15:47 ` [PATCH 01/22] slab: Remove unnecessary test from alloc_debug_processing() Matthew Wilcox (Oracle)
2025-08-29 15:47 ` [PATCH 02/22] slab: Remove unnecessary test from alloc_single_from_partial() Matthew Wilcox (Oracle)
2025-08-29 15:47 ` [PATCH 03/22] slab: Remove dead code in check_slab() Matthew Wilcox (Oracle)
2025-08-29 15:47 ` [PATCH 04/22] slab: Remove dead code in free_consistency_checks() Matthew Wilcox (Oracle)
2025-08-29 15:47 ` [PATCH 05/22] mm: Constify compound_order() and page_size() Matthew Wilcox (Oracle)
2025-08-29 20:42 ` Zi Yan
2025-08-29 22:53 ` Matthew Wilcox
2025-08-31 1:06 ` Zi Yan [this message]
2025-09-01 15:45 ` David Hildenbrand
2025-08-29 15:47 ` [PATCH 06/22] slab: Reimplement page_slab() Matthew Wilcox (Oracle)
2025-09-01 15:50 ` David Hildenbrand
2025-08-29 15:47 ` [PATCH 07/22] slab: Remove folio references from __ksize() Matthew Wilcox (Oracle)
2025-09-03 5:23 ` Matthew Wilcox
2025-08-29 15:47 ` [PATCH 08/22] slab: Remove folio references in memcg_slab_post_charge() Matthew Wilcox (Oracle)
2025-08-29 15:47 ` [PATCH 09/22] slab: Remove folio references in slab alloc/free Matthew Wilcox (Oracle)
2025-08-29 15:47 ` [PATCH 10/22] slab: Remove folio references from ___kmalloc_large_node() Matthew Wilcox (Oracle)
2025-08-29 15:47 ` [PATCH 11/22] slab: Remove folio references from free_large_kmalloc() Matthew Wilcox (Oracle)
2025-08-29 15:47 ` [PATCH 12/22] slab: Remove folio references from kvfree_rcu_cb() Matthew Wilcox (Oracle)
2025-08-29 15:47 ` [PATCH 13/22] slab: Remove folio references from kvfree() Matthew Wilcox (Oracle)
2025-08-29 15:47 ` [PATCH 14/22] slab: Remove folio references from __do_krealloc() Matthew Wilcox (Oracle)
2025-08-29 15:47 ` [PATCH 15/22] slab: Remove folio references from build_detached_freelist() Matthew Wilcox (Oracle)
2025-08-29 15:47 ` [PATCH 16/22] slab: Remove dead code from free_large_kmalloc() Matthew Wilcox (Oracle)
2025-08-29 15:47 ` [PATCH 17/22] slab: Remove folio references from kfree_rcu_sheaf() Matthew Wilcox (Oracle)
2025-08-29 15:47 ` [PATCH 18/22] usercopy: Remove folio references from check_heap_object() Matthew Wilcox (Oracle)
2025-08-29 15:47 ` [PATCH 19/22] memcg: Convert mem_cgroup_from_obj_folio() to mem_cgroup_from_obj_slab() Matthew Wilcox (Oracle)
2025-08-29 15:47 ` [PATCH 20/22] kasan: Remove references to folio in __kasan_mempool_poison_object() Matthew Wilcox (Oracle)
2025-09-01 15:47 ` David Hildenbrand
2025-08-29 15:47 ` [PATCH 21/22] slab: Remove references to folios from virt_to_slab() Matthew Wilcox (Oracle)
2025-08-29 15:47 ` [PATCH 22/22] mm: Remove redundant test in validate_page_before_insert() Matthew Wilcox (Oracle)
2025-09-01 15:46 ` David Hildenbrand
2025-08-29 17:05 ` [PATCH 00/22] Prepare slab for memdescs Matthew Wilcox
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