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Date:   Fri,  3 May 2019 12:12:23 -0700
From:   Sami Tolvanen <>
To:     Catalin Marinas <>,
        Will Deacon <>,
        Mark Rutland <>
Cc:     Kees Cook <>,
        Nick Desaulniers <>,,,
        Sami Tolvanen <>
Subject: [PATCH v2 1/3] arm64: fix syscall_fn_t type

Syscall wrappers in <asm/syscall_wrapper.h> use const struct pt_regs *
as the argument type. Use const in syscall_fn_t as well to fix indirect
call type mismatches with Control-Flow Integrity checking.

Signed-off-by: Sami Tolvanen <>
Reviewed-by: Mark Rutland <>
 arch/arm64/include/asm/syscall.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm64/include/asm/syscall.h b/arch/arm64/include/asm/syscall.h
index a179df3674a1a..6206ab9bfcfc5 100644
--- a/arch/arm64/include/asm/syscall.h
+++ b/arch/arm64/include/asm/syscall.h
@@ -20,7 +20,7 @@
 #include <linux/compat.h>
 #include <linux/err.h>
-typedef long (*syscall_fn_t)(struct pt_regs *regs);
+typedef long (*syscall_fn_t)(const struct pt_regs *regs);
 extern const syscall_fn_t sys_call_table[];

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