LoongArch: Remove a bogus reference to ZONE_DMA

ptesarik · chenhuacai · commit c37325cbd91a · 2025-04-26T09:58:12.000+08:00
Remove dead code. LoongArch does not have a DMA memory zone (24bit DMA).
The architecture does not even define MAX_DMA_PFN.

Cc: stable@vger.kernel.org
Reviewed-by: Mike Rapoport (Microsoft) &lt;rppt@kernel.org&gt;
Signed-off-by: Petr Tesarik &lt;ptesarik@suse.com&gt;
Signed-off-by: Huacai Chen &lt;chenhuacai@loongson.cn&gt;
diff --git a/arch/loongarch/mm/init.c b/arch/loongarch/mm/init.c
@@ -65,9 +65,6 @@ void __init paging_init(void)
 {
 	unsigned long max_zone_pfns[MAX_NR_ZONES];
 
-#ifdef CONFIG_ZONE_DMA
-	max_zone_pfns[ZONE_DMA] = MAX_DMA_PFN;
-#endif
 #ifdef CONFIG_ZONE_DMA32
 	max_zone_pfns[ZONE_DMA32] = MAX_DMA32_PFN;
 #endif

Original file line number	Diff line number	Diff line change
`@@ -65,9 +65,6 @@ void __init paging_init(void)`
`65`	`65`	`{`
`66`	`66`	`unsigned long max_zone_pfns[MAX_NR_ZONES];`
`67`	`67`
`68`		`-#ifdef CONFIG_ZONE_DMA`
`69`		`- max_zone_pfns[ZONE_DMA] = MAX_DMA_PFN;`
`70`		`-#endif`
`71`	`68`	`#ifdef CONFIG_ZONE_DMA32`
`72`	`69`	`max_zone_pfns[ZONE_DMA32] = MAX_DMA32_PFN;`
`73`	`70`	`#endif`