[lkml]   [2018]   [Dec]   [10]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
Patch in this message
Subject[PATCH v9 2/8] uaccess: add untagged_addr definition for other arches
To allow arm64 syscalls accept tagged pointers from userspace, we must
untag them when they are passed to the kernel. Since untagging is done in
generic parts of the kernel, the untagged_addr macro needs to be defined
for all architectures.

Define it as a noop for other architectures besides arm64.

Acked-by: Catalin Marinas <>
Signed-off-by: Andrey Konovalov <>
include/linux/uaccess.h | 4 ++++
1 file changed, 4 insertions(+)

diff --git a/include/linux/uaccess.h b/include/linux/uaccess.h
index efe79c1cdd47..42b7a4ac65e2 100644
--- a/include/linux/uaccess.h
+++ b/include/linux/uaccess.h
@@ -13,6 +13,10 @@

#include <asm/uaccess.h>

+#ifndef untagged_addr
+#define untagged_addr(addr) (addr)
* Architectures should provide two primitives (raw_copy_{to,from}_user())
* and get rid of their private instances of copy_{to,from}_user() and
 \ /
  Last update: 2018-12-10 13:51    [W:0.140 / U:5.300 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site