Adding a patch fixing ARM trouble on the recent linux 2.6.35

svn path=/nixpkgs/branches/stdenv-updates/; revision=24158

pkgs/os-specific/linux/kernel/patches.nix

@@ -198,6 +198,11 @@ in
       patch = ./dell-rfkill.patch;
     };
 
+  sheevaplug_modules_2_6_35 =
+    { name = "sheevaplug_modules-2.6.35";
+      patch = ./sheevaplug_modules-2.6.35.patch;
+    };
+
   guruplug_defconfig =
     {
       # Default configuration for the GuruPlug.  From

pkgs/os-specific/linux/kernel/sheevaplug_modules-2.6.35.patch

@@ -0,0 +1,63 @@
+http://www.mail-archive.com/armedslack@lists.armedslack.org/msg00212.html
+
+From d0679c730395d0bde9a46939e7ba255b4ba7dd7c Mon Sep 17 00:00:00 2001
+From: Andi Kleen <andi@firstfloor.org>
+Date: Tue, 2 Feb 2010 14:40:02 -0800
+Subject: [PATCH] kbuild: move -fno-dwarf2-cfi-asm to powerpc only
+
+Better dwarf2 unwind information is a good thing, it allows better
+debugging with kgdb and crash and helps systemtap.
+
+Commit 003086497f07f7f1e67c0c295e261740f822b377 ("Build with
+-fno-dwarf2-cfi-asm") disabled some CFI information globally to work
+around a module loader bug on powerpc.
+
+But this disables the better unwind tables for all architectures, not just
+powerpc.  Move the workaround to powerpc and also add a suitable comment
+that's it really a workaround.
+
+This improves dwarf2 unwind tables on x86 at least.
+
+Signed-off-by: Andi Kleen <ak@linux.intel.com>
+Cc: Kyle McMartin <kyle@mcmartin.ca>
+Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
+Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
+Signed-off-by: Michal Marek <mmarek@suse.cz>
+---
+ Makefile              |    3 ---
+ arch/powerpc/Makefile |    5 +++++
+ 2 files changed, 5 insertions(+), 3 deletions(-)
+
+diff --git a/Makefile b/Makefile
+index 03053c6..2e74a68 100644
+--- a/Makefile
++++ b/Makefile
+@@ -579,6 +579,9 @@ KBUILD_CFLAGS += $(call cc-option,-Wno-pointer-sign,)
+ # disable invalid "can't wrap" optimizations for signed / pointers
+ KBUILD_CFLAGS	+= $(call cc-option,-fno-strict-overflow)
+ 
++# revert to pre-gcc-4.4 behaviour of .eh_frame
++KBUILD_CFLAGS	+= $(call cc-option,-fno-dwarf2-cfi-asm)
++
+ # conserve stack if available
+ KBUILD_CFLAGS   += $(call cc-option,-fconserve-stack)
+ 
+diff --git a/arch/powerpc/Makefile b/arch/powerpc/Makefile
+index 1a54a3b..42dcd3f 100644
+--- a/arch/powerpc/Makefile
++++ b/arch/powerpc/Makefile
+@@ -112,11 +112,6 @@ KBUILD_CFLAGS += $(call cc-option,-mspe=no)
+ # kernel considerably.
+ KBUILD_CFLAGS += $(call cc-option,-funit-at-a-time)
+ 
+-# FIXME: the module load should be taught about the additional relocs
+-# generated by this.
+-# revert to pre-gcc-4.4 behaviour of .eh_frame
+-KBUILD_CFLAGS	+= $(call cc-option,-fno-dwarf2-cfi-asm)
+-
+ # Never use string load/store instructions as they are
+ # often slow when they are implemented at all
+ KBUILD_CFLAGS		+= -mno-string
+-- 
+1.7.3.1
+

pkgs/top-level/all-packages.nix

@@ -4661,7 +4661,8 @@ let
       [ #kernelPatches.fbcondecor_2_6_35
         kernelPatches.sec_perm_2_6_24
         kernelPatches.aufs2_2_6_35
-      ];
+      ] ++ lib.optional (platform.kernelArch == "arm")
+        kernelPatches.sheevaplug_modules_2_6_35;
   };
 
   linux_nanonote_jz_2_6_34 = makeOverridable