linux-kernel - [tip:x86/asm] x86/compat: Make mmap_is

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Date:	Mon, 6 Jul 2015 08:46:40 -0700
From:	tip-bot for Brian Gerst <tipbot@...or.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	dvlasenk@...hat.com, bp@...en8.de, linux-kernel@...r.kernel.org,
	tglx@...utronix.de, luto@...capital.net, peterz@...radead.org,
	mingo@...nel.org, brgerst@...il.com, hpa@...or.com,
	torvalds@...ux-foundation.org
Subject: [tip:x86/asm] x86/compat: Make mmap_is_ia32() common compat

Commit-ID:  b2e02b820d5b42479195b89d3d73f31bcedb264e
Gitweb:     http://git.kernel.org/tip/b2e02b820d5b42479195b89d3d73f31bcedb264e
Author:     Brian Gerst <brgerst@...il.com>
AuthorDate: Mon, 22 Jun 2015 07:55:11 -0400
Committer:  Ingo Molnar <mingo@...nel.org>
CommitDate: Mon, 6 Jul 2015 15:28:55 +0200

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>
Cc: Andy Lutomirski <luto@...capital.net>
Cc: Borislav Petkov <bp@...en8.de>
Cc: Denys Vlasenko <dvlasenk@...hat.com>
Cc: H. Peter Anvin <hpa@...or.com>
Cc: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Thomas Gleixner <tglx@...utronix.de>
Link: http://lkml.kernel.org/r/1434974121-32575-3-git-send-email-brgerst@gmail.com
Signed-off-by: Ingo Molnar <mingo@...nel.org>
---
 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() */
--
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