linux-kernel - [PATCH] dma-mapping: update comment after dmabounce removal

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-Id: <20220720190208.11270-1-lukas.bulwahn@gmail.com>
Date:   Wed, 20 Jul 2022 21:02:08 +0200
From:   Lukas Bulwahn <lukas.bulwahn@...il.com>
To:     Russell King <linux@...linux.org.uk>,
        Christoph Hellwig <hch@....de>, Arnd Bergmann <arnd@...db.de>,
        linux-arm-kernel@...ts.infradead.org
Cc:     kernel-janitors@...r.kernel.org, linux-kernel@...r.kernel.org,
        Lukas Bulwahn <lukas.bulwahn@...il.com>
Subject: [PATCH] dma-mapping: update comment after dmabounce removal

Commit e3217540c271 ("ARM/dma-mapping: remove dmabounce") removes the
config DMABOUNCE. A comment to the function __dma_page_cpu_to_dev() refers
to this removed config DMABOUNCE.

Remove the obsolete explanation, but keep the recommendation not to use
__dma_page_cpu_to_dev() and use dma_sync_* functions instead.

Signed-off-by: Lukas Bulwahn <lukas.bulwahn@...il.com>
---
 arch/arm/mm/dma-mapping.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/arch/arm/mm/dma-mapping.c b/arch/arm/mm/dma-mapping.c
index e68d1d2ac4be..16c2cdd04639 100644
--- a/arch/arm/mm/dma-mapping.c
+++ b/arch/arm/mm/dma-mapping.c
@@ -679,8 +679,7 @@ static void dma_cache_maint_page(struct page *page, unsigned long offset,
 
 /*
  * Make an area consistent for devices.
- * Note: Drivers should NOT use this function directly, as it will break
- * platforms with CONFIG_DMABOUNCE.
+ * Note: Drivers should NOT use this function directly.
  * Use the driver DMA support - see dma-mapping.h (dma_sync_*)
  */
 static void __dma_page_cpu_to_dev(struct page *page, unsigned long off,
-- 
2.17.1