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Message-Id: <fb5fa982f99419a3099031cf20ddb9957e627886.1535629099.git.andreyknvl@google.com>
Date: Thu, 30 Aug 2018 13:41:06 +0200
From: Andrey Konovalov <andreyknvl@...gle.com>
To: Catalin Marinas <catalin.marinas@....com>,
Will Deacon <will.deacon@....com>,
Mark Rutland <mark.rutland@....com>,
Robin Murphy <robin.murphy@....com>,
Al Viro <viro@...iv.linux.org.uk>,
Andrey Konovalov <andreyknvl@...gle.com>,
Kees Cook <keescook@...omium.org>,
Kate Stewart <kstewart@...uxfoundation.org>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
Andrew Morton <akpm@...ux-foundation.org>,
Ingo Molnar <mingo@...nel.org>,
"Kirill A . Shutemov" <kirill.shutemov@...ux.intel.com>,
Shuah Khan <shuah@...nel.org>,
linux-arm-kernel@...ts.infradead.org, linux-doc@...r.kernel.org,
linux-mm@...ck.org, linux-arch@...r.kernel.org,
linux-kselftest@...r.kernel.org, linux-kernel@...r.kernel.org
Cc: Dmitry Vyukov <dvyukov@...gle.com>,
Kostya Serebryany <kcc@...gle.com>,
Evgeniy Stepanov <eugenis@...gle.com>,
Lee Smith <Lee.Smith@....com>,
Ramana Radhakrishnan <Ramana.Radhakrishnan@....com>,
Jacob Bramley <Jacob.Bramley@....com>,
Ruben Ayrapetyan <Ruben.Ayrapetyan@....com>,
Chintan Pandya <cpandya@...eaurora.org>
Subject: [PATCH v6 01/11] arm64: add type casts to untagged_addr macro
This patch makes the untagged_addr macro accept all kinds of address types
(void *, unsigned long, etc.) and allows not to specify type casts in each
place where it is used. This is done by using __typeof__.
Signed-off-by: Andrey Konovalov <andreyknvl@...gle.com>
---
arch/arm64/include/asm/uaccess.h | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/arch/arm64/include/asm/uaccess.h b/arch/arm64/include/asm/uaccess.h
index e66b0fca99c2..2d6451cbaa86 100644
--- a/arch/arm64/include/asm/uaccess.h
+++ b/arch/arm64/include/asm/uaccess.h
@@ -102,7 +102,8 @@ static inline unsigned long __range_ok(const void __user *addr, unsigned long si
* up with a tagged userland pointer. Clear the tag to get a sane pointer to
* pass on to access_ok(), for instance.
*/
-#define untagged_addr(addr) sign_extend64(addr, 55)
+#define untagged_addr(addr) \
+ ((__typeof__(addr))sign_extend64((__u64)(addr), 55))
#define access_ok(type, addr, size) __range_ok(addr, size)
#define user_addr_max get_fs
--
2.19.0.rc0.228.g281dcd1b4d0-goog
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