path: root/arch/arm
diff options
authorWill Deacon <will.deacon@arm.com>2013-11-19 15:46:11 +0100
committerRussell King <rmk+kernel@arm.linux.org.uk>2013-11-20 23:05:53 +0000
commitb7ec699405f55667caeb46d96229d75bf33a83ad (patch)
treeb27d565cbd94b5e5a57ef727691c7ea52b5cd0e6 /arch/arm
parent5761704a41c63ebe756295a13d2e236280dd8a86 (diff)
ARM: 7893/1: bitops: only emit .arch_extension mp if CONFIG_SMP
Uwe reported a build failure when targetting a NOMMU platform with my recent prefetch changes: arch/arm/lib/changebit.S: Assembler messages: arch/arm/lib/changebit.S:15: Error: architectural extension `mp' is not allowed for the current base architecture This is due to use of the .arch_extension mp directive immediately prior to an ALT_SMP(...) instruction. Whilst the ALT_SMP macro will expand to nothing if !CONFIG_SMP, gas will still choke on the directive. This patch fixes the issue by only emitting the sequence (including the directive) if CONFIG_SMP=y. Tested-by: Uwe Kleine-K├Ânig <u.kleine-koenig@pengutronix.de> Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm')
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/arm/lib/bitops.h b/arch/arm/lib/bitops.h
index e0c68d5bb7dc..52886b89706c 100644
--- a/arch/arm/lib/bitops.h
+++ b/arch/arm/lib/bitops.h
@@ -10,7 +10,7 @@ UNWIND( .fnstart )
and r3, r0, #31 @ Get bit offset
mov r0, r0, lsr #5
add r1, r1, r0, lsl #2 @ Get word offset
-#if __LINUX_ARM_ARCH__ >= 7
+#if __LINUX_ARM_ARCH__ >= 7 && defined(CONFIG_SMP)
.arch_extension mp
ALT_SMP(W(pldw) [r1])