RISC-V: Add conditional macro for zone of DMA32

Zong Li · palmer-dabbelt · commit d5fad48cfb4b · 2018-07-04T13:53:21.000-07:00
The DMA32 is for 64-bit usage.

Signed-off-by: Zong Li &lt;zong@andestech.com&gt;
Reviewed-by: Christoph Hellwig &lt;hch@lst.de&gt;
Signed-off-by: Palmer Dabbelt &lt;palmer@sifive.com&gt;
diff --git a/arch/riscv/mm/init.c b/arch/riscv/mm/init.c
@@ -28,7 +28,9 @@ static void __init zone_sizes_init(void)
 {
 	unsigned long max_zone_pfns[MAX_NR_ZONES] = { 0, };
 
+#ifdef CONFIG_ZONE_DMA32
 	max_zone_pfns[ZONE_DMA32] = PFN_DOWN(min(4UL * SZ_1G, max_low_pfn));
+#endif
 	max_zone_pfns[ZONE_NORMAL] = max_low_pfn;
 
 	free_area_init_nodes(max_zone_pfns);

Original file line number	Diff line number	Diff line change
`@@ -28,7 +28,9 @@ static void __init zone_sizes_init(void)`
`28`	`28`	`{`
`29`	`29`	`unsigned long max_zone_pfns[MAX_NR_ZONES] = { 0, };`
`30`	`30`
	`31`	`+#ifdef CONFIG_ZONE_DMA32`
`31`	`32`	`max_zone_pfns[ZONE_DMA32] = PFN_DOWN(min(4UL * SZ_1G, max_low_pfn));`
	`33`	`+#endif`
`32`	`34`	`max_zone_pfns[ZONE_NORMAL] = max_low_pfn;`
`33`	`35`
`34`	`36`	`free_area_init_nodes(max_zone_pfns);`