blob: ecaedf0f0f28826ea4ef946b41a7f89dfccc0d48 [file] [log] [blame]
From 6b8059e46fa93131757315f3388792408c7de8e1 Mon Sep 17 00:00:00 2001
From: Andy Lutomirski <>
Date: Wed, 3 Jul 2019 13:34:05 -0700
Subject: [PATCH] x86/syscalls: Make __X32_SYSCALL_BIT be unsigned long
commit 45e29d119e9923ff14dfb840e3482bef1667bbfb upstream.
Currently, it's an int. This is bizarre. Fortunately, the code using it
still works: ~__X32_SYSCALL_BIT is also int, so, if nr is unsigned long,
then C kindly sign-extends the ~__X32_SYSCALL_BIT part, and it actually
results in the desired value.
This is far more subtle than it deserves to be. Syscall numbers are, for
all practical purposes, unsigned long, so make __X32_SYSCALL_BIT be
unsigned long.
Signed-off-by: Andy Lutomirski <>
Signed-off-by: Thomas Gleixner <>
Signed-off-by: Paul Gortmaker <>
diff --git a/arch/x86/include/uapi/asm/unistd.h b/arch/x86/include/uapi/asm/unistd.h
index 30d7d04d72d6..196fdd02b8b1 100644
--- a/arch/x86/include/uapi/asm/unistd.h
+++ b/arch/x86/include/uapi/asm/unistd.h
@@ -3,7 +3,7 @@
#define _UAPI_ASM_X86_UNISTD_H
/* x32 syscall flag bit */
-#define __X32_SYSCALL_BIT 0x40000000
+#define __X32_SYSCALL_BIT 0x40000000UL
#ifndef __KERNEL__
# ifdef __i386__