aboutsummaryrefslogtreecommitdiff
path: root/arch
diff options
context:
space:
mode:
authorBen Hutchings <ben@decadent.org.uk>2015-10-01 01:40:43 +0100
committerIngo Molnar <mingo@kernel.org>2015-10-02 09:43:21 +0200
commitf4b4aae1828855db761bf998ce37d3062b1d6446 (patch)
treee2bf23ffeb061a9949415114a7538c00f4f7605a /arch
parentab76f7b4ab2397ffdd2f1eb07c55697d19991d10 (diff)
downloadlinux-linaro-stable-f4b4aae1828855db761bf998ce37d3062b1d6446.tar.gz
x86/headers/uapi: Fix __BITS_PER_LONG value for x32 builds
On x32, gcc predefines __x86_64__ but long is only 32-bit. Use __ILP32__ to distinguish x32. Fixes this compiler error in perf: tools/include/asm-generic/bitops/__ffs.h: In function '__ffs': tools/include/asm-generic/bitops/__ffs.h:19:8: error: right shift count >= width of type [-Werror=shift-count-overflow] word >>= 32; ^ This isn't sufficient to build perf for x32, though. Signed-off-by: Ben Hutchings <ben@decadent.org.uk> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Mike Galbraith <efault@gmx.de> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: linux-kernel@vger.kernel.org Link: http://lkml.kernel.org/r/1443660043.2730.15.camel@decadent.org.uk Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch')
-rw-r--r--arch/x86/include/uapi/asm/bitsperlong.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/x86/include/uapi/asm/bitsperlong.h b/arch/x86/include/uapi/asm/bitsperlong.h
index b0ae1c4dc791..217909b4d6f5 100644
--- a/arch/x86/include/uapi/asm/bitsperlong.h
+++ b/arch/x86/include/uapi/asm/bitsperlong.h
@@ -1,7 +1,7 @@
#ifndef __ASM_X86_BITSPERLONG_H
#define __ASM_X86_BITSPERLONG_H
-#ifdef __x86_64__
+#if defined(__x86_64__) && !defined(__ILP32__)
# define __BITS_PER_LONG 64
#else
# define __BITS_PER_LONG 32