From: Richard Weinberger <rich...@nod.at>
-------------------
This is a commit scheduled for the next v2.6.34 longterm release.
http://git.kernel.org/?p=linux/kernel/git/paulg/longterm-queue-2.6.34.git
If you see a problem with using this for longterm, please comment.
-------------------
commit 3a3679078aed2c451ebc32836bbd3b8219a65e01 upstream.
Commit d12337 (rwsem: Remove redundant asmregparm annotation)
broke rwsem on UML.
As we cannot compile UML with -mregparm=3 and keeping asmregparm only
for UML is inadequate the easiest solution is using RWSEM_GENERIC_SPINLOCK.
Thanks to Thomas Gleixner for the idea.
Reported-by: Toralf Förster <toralf.foers...@gmx.de>
Tested-by: Toralf Förster <toralf.foers...@gmx.de>
Signed-off-by: Richard Weinberger <rich...@nod.at>
Cc: user-mode-linux-devel@lists.sourceforge.net
Link:
http://lkml.kernel.org/r/%3C1306183893-26655-1-git-send-email-richard%40nod.at%3E
Signed-off-by: Thomas Gleixner <t...@linutronix.de>
Signed-off-by: Paul Gortmaker <paul.gortma...@windriver.com>
---
arch/um/Kconfig.x86 | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/arch/um/Kconfig.x86 b/arch/um/Kconfig.x86
index 5ee3280..91668e1 100644
--- a/arch/um/Kconfig.x86
+++ b/arch/um/Kconfig.x86
@@ -20,10 +20,10 @@ config X86_32
select HAVE_AOUT
config RWSEM_XCHGADD_ALGORITHM
- def_bool X86_XADD
+ def_bool X86_XADD && 64BIT
config RWSEM_GENERIC_SPINLOCK
- def_bool !X86_XADD
+ def_bool !RWSEM_XCHGADD_ALGORITHM
config 3_LEVEL_PGTABLES
bool "Three-level pagetables (EXPERIMENTAL)" if !64BIT
--
1.7.12.1
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