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Thank you for the feedback. I understand =A1=AA checkpatch should onl= y be used on patches, not to find and fix pre-existing style issues in exis= ting code. I'll keep this in mind for future submissions. Sorry for the noise.

=B7=A2=BC=FE=C8=CB: Vlast= imil Babka (SUSE) <vbabka@kernel.org>
=B7=A2=CB=CD=CA=B1=BC=E4: 2026=C4=EA4=D4=C216=C8=D5 14:40:31
=CA=D5=BC=FE=C8=CB: Xiang Gao; akpm@linux-foundation.org
=B3=AD=CB=CD: surenb@google.com; mhocko@suse.com; jackmanb@google.co= m; hannes@cmpxchg.org; ziy@nvidia.com; linux-mm@kvack.org; linux-kernel@vge= r.kernel.org; =B8=DF=CF=E8
=D6=F7=CC=E2: [External Mail]Re: [PATCH] mm/page_alloc: fix spaces u= sed for indentation instead of tabs
 
[=CD=E2=B2=BF=D3=CA=BC=FE] =B4=CB=D3=CA=BC=FE=C0= =B4=D4=B4=D3=DA=D0=A1=C3=D7=B9=AB=CB=BE=CD=E2=B2=BF=A3=AC=C7=EB=BD=F7=C9=F7= =B4=A6=C0=ED=A1=A3=C8=F4=B6=D4=D3=CA=BC=FE=B0=B2=C8=AB=D0=D4=B4=E6=D2=C9=A3= =AC=C7=EB=BD=AB=D3=CA=BC=FE=D7=AA=B7=A2=B8=F8misec@xiaomi.com=BD=F8=D0=D0= =B7=B4=C0=A1

On 4/16/26 04:19, Xiang Gao wrote:
> From: Xiang Gao <gaoxiang17@xiaomi.com>
>
> checkpatch.pl reports two indentation errors in page_alloc.c where
> spaces are used instead of tabs:

checkpatch should not be used on existing source files, only on patches
changing them for another reason. There are many pre-existing things that would be flagged and we don't want the churn. So we only use checkpatch to<= br> avoid introducing new mistakes, and only fix the pre-existing ones when
changing the code for another reason.

>   ERROR: code indent should use tabs where possible
>   #887: FILE: mm/page_alloc.c:887:
>   +        VM_WARN_ON= CE(get_pageblock_migratetype(page) !=3D migratetype,$
>
>   ERROR: code indent should use tabs where possible
>   #6626: FILE: mm/page_alloc.c:6626:
>   +         = ;            &n= bsp;            = ;            &n= bsp;     sysctl_min_unmapped_ratio) / 100;$
>
> In __del_page_from_free_list(), the VM_WARN_ONCE at line 887 uses 8 > spaces for indentation instead of a tab. The identical VM_WARN_ONCE > calls in __add_to_free_list() and move_to_free_list() both correctly > use a tab.
>
> In setup_min_unmapped_ratio(), the continuation line at 6626 uses 6 > tabs + 9 spaces for alignment. Replace the excess spaces with 6 ta= bs
> + 1 space to correctly align with the opening parenthesis on the > previous line.
>
> Signed-off-by: gaoxiang17 <gaoxiang17@xiaomi.com>
> ---
>  mm/page_alloc.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/mm/page_alloc.c b/mm/page_alloc.c
> index 2d4b6f1a554e..752673a9b43c 100644
> --- a/mm/page_alloc.c
> +++ b/mm/page_alloc.c
> @@ -884,7 +884,7 @@ static inline void __del_page_from_free_list(s= truct page *page, struct zone *zon
>  {
>       int nr_pages =3D 1 << order;=
>
> -        VM_WARN_ONCE(get_pageblock= _migratetype(page) !=3D migratetype,
> +     VM_WARN_ONCE(get_pageblock_migratetype(p= age) !=3D migratetype,
>            = ;        "page type is %d, passed m= igratetype is %d (nr=3D%d)\n",
>            = ;        get_pageblock_migratetype(page)= , migratetype, nr_pages);
>
> @@ -6623,7 +6623,7 @@ static void setup_min_unmapped_ratio(void) >
>       for_each_zone(zone)
>            = ;   zone->zone_pgdat->min_unmapped_pages +=3D (zone_man= aged_pages(zone) *
> -           &nb= sp;            =             &nb= sp;            =      sysctl_min_unmapped_ratio) / 100;
> +           = ;            &n= bsp;            = ;          sysctl_min_unmapped= _ratio) / 100;
>  }
>
>

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