From: Ingo Molnar <mingo@elte.hu>
Date: Thu, 5 Oct 2006 16:47:22 +0000 (+0200)
Subject: [PATCH] i386: fix rwsem build bug on CONFIG_M386=y
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=88271e9e43e65537c6390af3718a60c45c787e8f;p=openwrt%2Fstaging%2Fblogic.git

[PATCH] i386: fix rwsem build bug on CONFIG_M386=y

CONFIG_M386 turns on spinlock-based generic rwsems - which surprises the
semaphore.S rwsem stubs. Tested both with and without CONFIG_M386.

Reported-by: Klaus Knopper <knopper@knopper.net>
Triaged-by: Adrian Bunk <bunk@stusta.de>

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andi Kleen <ak@suse.de>
---

diff --git a/arch/i386/lib/semaphore.S b/arch/i386/lib/semaphore.S
index ef6ad9e1a609..c01eb39c0b43 100644
--- a/arch/i386/lib/semaphore.S
+++ b/arch/i386/lib/semaphore.S
@@ -152,6 +152,8 @@ ENTRY(__read_lock_failed)
 
 #endif
 
+#ifdef CONFIG_RWSEM_XCHGADD_ALGORITHM
+
 /* Fix up special calling conventions */
 ENTRY(call_rwsem_down_read_failed)
 	CFI_STARTPROC
@@ -214,3 +216,4 @@ ENTRY(call_rwsem_downgrade_wake)
 	CFI_ENDPROC
 	END(call_rwsem_downgrade_wake)
 
+#endif