[PATCH v9 1/8] arm64: add type casts to untagged_addr macro
STALE2775d
REVIEWED: 3 (3M)
From: Andrey Konovalov <hidden>
Date: 2018-12-10 12:51:39
Also in:
linux-arch, linux-doc, linux-kselftest, linux-mm, lkml
Subsystem:
arm64 port (aarch64 architecture), the rest · Maintainers:
Catalin Marinas, Will Deacon, Linus Torvalds
Revision v9 of 23 in this series; 1 review trailer (1 from subsystem maintainers).
Revisions (23)
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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__. Acked-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Andrey Konovalov <redacted> --- 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 07c34087bd5e..3c3864ba3cc1 100644
--- a/arch/arm64/include/asm/uaccess.h
+++ b/arch/arm64/include/asm/uaccess.h@@ -101,7 +101,8 @@ 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
--
2.20.0.rc2.403.gdbc3b29805-goog
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