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From: Andrey Konovalov <andreyknvl@google.com>
To: Catalin Marinas <catalin.marinas@arm.com>,
	Will Deacon <will.deacon@arm.com>,
	Mark Rutland <mark.rutland@arm.com>,
	Robin Murphy <robin.murphy@arm.com>,
	Al Viro <viro@zeniv.linux.org.uk>,
	Andrey Konovalov <andreyknvl@google.com>,
	Kees Cook <keescook@chromium.org>,
	Kate Stewart <kstewart@linuxfoundation.org>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	Andrew Morton <akpm@linux-foundation.org>,
	Ingo Molnar <mingo@kernel.org>,
	"Kirill A . Shutemov" <kirill.shutemov@linux.intel.com>,
	Shuah Khan <shuah@kernel.org>,
	linux-arm-kernel@lists.infradead.org, linux-doc@vger.kernel.org,
	linux-mm@kvack.org, linux-arch@vger.kernel.org,
	linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org
Cc: Dmitry Vyukov <dvyukov@google.com>,
	Kostya Serebryany <kcc@google.com>,
	Evgeniy Stepanov <eugenis@google.com>,
	Lee Smith <Lee.Smith@arm.com>,
	Ramana Radhakrishnan <Ramana.Radhakrishnan@arm.com>,
	Jacob Bramley <Jacob.Bramley@arm.com>,
	Ruben Ayrapetyan <Ruben.Ayrapetyan@arm.com>,
	Chintan Pandya <cpandya@codeaurora.org>
Subject: [PATCH v6 01/11] arm64: add type casts to untagged_addr macro
Date: Thu, 30 Aug 2018 13:41:06 +0200	[thread overview]
Message-ID: <fb5fa982f99419a3099031cf20ddb9957e627886.1535629099.git.andreyknvl@google.com> (raw)
In-Reply-To: <cover.1535629099.git.andreyknvl@google.com>

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@google.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


  reply	other threads:[~2018-08-30 11:41 UTC|newest]

Thread overview: 34+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-08-30 11:41 [PATCH v6 00/11] arm64: untag user pointers passed to the kernel Andrey Konovalov
2018-08-30 11:41 ` Andrey Konovalov [this message]
2018-08-30 11:41 ` [PATCH v6 02/11] uaccess: add untagged_addr definition for other arches Andrey Konovalov
2018-08-30 11:41 ` [PATCH v6 03/11] arm64: untag user addresses in access_ok and __uaccess_mask_ptr Andrey Konovalov
2018-08-30 11:41 ` [PATCH v6 04/11] mm, arm64: untag user addresses in mm/gup.c Andrey Konovalov
2018-08-30 11:41 ` [PATCH v6 05/11] lib, arm64: untag addrs passed to strncpy_from_user and strnlen_user Andrey Konovalov
2018-08-30 11:41 ` [PATCH v6 06/11] arm64: untag user address in __do_user_fault Andrey Konovalov
2018-08-30 11:41 ` [PATCH v6 07/11] fs, arm64: untag user address in copy_mount_options Andrey Konovalov
2018-08-30 11:41 ` [PATCH v6 08/11] usb, arm64: untag user addresses in devio Andrey Konovalov
2018-08-30 11:41 ` [PATCH v6 09/11] arm64: update Documentation/arm64/tagged-pointers.txt Andrey Konovalov
2018-08-30 11:41 ` [PATCH v6 10/11] selftests, arm64: add a selftest for passing tagged pointers to kernel Andrey Konovalov
2018-08-30 11:41 ` [PATCH v6 11/11] arm64: annotate user pointers casts detected by sparse Andrey Konovalov
2018-08-31  8:11   ` Luc Van Oostenryck
2018-08-31 13:42     ` Al Viro
2018-09-03 12:34       ` Andrey Konovalov
2018-09-03 13:49         ` Vincenzo Frascino
2018-09-03 15:10           ` Luc Van Oostenryck
2018-09-04 11:27             ` Vincenzo Frascino
2018-09-05 19:03               ` Luc Van Oostenryck
2018-09-06 14:13                 ` Vincenzo Frascino
2018-09-06 20:10                   ` Luc Van Oostenryck
2018-09-03 13:56         ` Al Viro
2018-09-06 21:13   ` Linus Torvalds
2018-09-06 21:16     ` Linus Torvalds
2018-09-06 23:08       ` Luc Van Oostenryck
2018-09-07 15:26       ` Catalin Marinas
2018-09-07 16:30         ` Linus Torvalds
2018-09-11 16:41           ` Catalin Marinas
2018-09-17 17:01             ` Andrey Konovalov
2018-09-24 15:04               ` Andrey Konovalov
2018-09-28 17:50               ` Catalin Marinas
2018-10-02 13:19                 ` Andrey Konovalov
2018-09-14  1:25   ` [LKP] [arm64] 7b5b51e7b3: kvm-unit-tests.rmap_chain.fail kernel test robot
2018-08-30 11:48 ` [PATCH v6 00/11] arm64: untag user pointers passed to the kernel Andrey Konovalov

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