This is a note to let you know that I've just added the patch titled
um: Use RWSEM_GENERIC_SPINLOCK on x86
to the 2.6.39-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
um-use-rwsem_generic_spinlock-on-x86.patch
and it can be found in the queue-2.6.39 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <[email protected]> know about it.
>From 3a3679078aed2c451ebc32836bbd3b8219a65e01 Mon Sep 17 00:00:00 2001
From: Richard Weinberger <[email protected]>
Date: Mon, 23 May 2011 22:51:33 +0200
Subject: um: Use RWSEM_GENERIC_SPINLOCK on x86
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From: Richard Weinberger <[email protected]>
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 <[email protected]>
Tested-by: Toralf Förster <[email protected]>
Signed-off-by: Richard Weinberger <[email protected]>
Cc: [email protected]
Link:
http://lkml.kernel.org/r/%3C1306183893-26655-1-git-send-email-richard%40nod.at%3E
Signed-off-by: Thomas Gleixner <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
arch/um/Kconfig.x86 | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
--- a/arch/um/Kconfig.x86
+++ b/arch/um/Kconfig.x86
@@ -29,10 +29,10 @@ config X86_64
def_bool 64BIT
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
Patches currently in stable-queue which might be from [email protected] are
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