lkml.org 
[lkml]   [2020]   [Oct]   [10]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH v2 5/5] mm: Update DMA zones description
Date
The default behavior for arm64 changed, so reflect that.

Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
---
include/linux/mmzone.h | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h
index fb3bf696c05e..4ee2306351b9 100644
--- a/include/linux/mmzone.h
+++ b/include/linux/mmzone.h
@@ -363,8 +363,9 @@ enum zone_type {
* - arm only uses ZONE_DMA, the size, up to 4G, may vary depending on
* the specific device.
*
- * - arm64 has a fixed 1G ZONE_DMA and ZONE_DMA32 for the rest of the
- * lower 4G.
+ * - arm64 uses a single 4GB ZONE_DMA, except on the Raspberry Pi 4,
+ * in which ZONE_DMA covers the first GB and ZONE_DMA32 the rest of
+ * the lower 4GB.
*
* - powerpc only uses ZONE_DMA, the size, up to 2G, may vary
* depending on the specific device.
--
2.28.0
\
 
 \ /
  Last update: 2020-10-11 00:57    [W:0.101 / U:0.032 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site