linux-kernel - [PATCH 02/12] x86/compat: Make mmap_is

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Message-Id: <1434974121-32575-3-git-send-email-brgerst@gmail.com>
Date:	Mon, 22 Jun 2015 07:55:11 -0400
From:	Brian Gerst <brgerst@...il.com>
To:	x86@...nel.org
Cc:	linux-kernel@...r.kernel.org, Ingo Molnar <mingo@...nel.org>,
	"H. Peter Anvin" <hpa@...or.com>,
	Denys Vlasenko <dvlasenk@...hat.com>,
	Andy Lutomirski <luto@...capital.net>
Subject: [PATCH 02/12] x86/compat: Make mmap_is_ia32() common compat

TIF_ADDR32 is set for both ia32 and x32 tasks, so change from
CONFIG_IA32_EMULATION to CONFIG_COMPAT.  Use config_enabled()
to make the function more readable.

Signed-off-by: Brian Gerst <brgerst@...il.com>
---
 arch/x86/include/asm/elf.h | 11 +++--------
 1 file changed, 3 insertions(+), 8 deletions(-)

diff --git a/arch/x86/include/asm/elf.h b/arch/x86/include/asm/elf.h
index f161c18..180b6fe 100644
--- a/arch/x86/include/asm/elf.h
+++ b/arch/x86/include/asm/elf.h
@@ -344,14 +344,9 @@ extern int compat_arch_setup_additional_pages(struct linux_binprm *bprm,
  */
 static inline int mmap_is_ia32(void)
 {
-#ifdef CONFIG_X86_32
-	return 1;
-#endif
-#ifdef CONFIG_IA32_EMULATION
-	if (test_thread_flag(TIF_ADDR32))
-		return 1;
-#endif
-	return 0;
+	return config_enabled(CONFIG_X86_32) ||
+	       (config_enabled(CONFIG_COMPAT) &&
+		test_thread_flag(TIF_ADDR32));
 }
 
 /* Do not change the values. See get_align_mask() */
-- 
2.1.0

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