kernel: fix build of 3.10 and 3.12 on i686

pkgs/os-specific/linux/kernel/gcc5-link-apm.patch

···
+From 54c2f3fdb941204cad136024c7b854b7ad112ab6 Mon Sep 17 00:00:00 2001
+From: Andi Kleen <[e-mail]>
+Date: Mon, 5 Aug 2013 15:02:45 -0700
+Subject: x86, asmlinkage, apm: Make APM data structure used from assembler
+ visible
+
+Signed-off-by: Andi Kleen <[e-mail]>
+Link: http://lkml.kernel.org/r/[e-mail]
+Signed-off-by: H. Peter Anvin <[e-mail]>
+---
+ arch/x86/kernel/apm_32.c | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/arch/x86/kernel/apm_32.c b/arch/x86/kernel/apm_32.c
+index 53a4e27..3ab0343 100644
+--- a/arch/x86/kernel/apm_32.c
++++ b/arch/x86/kernel/apm_32.c
+@@ -392,7 +392,7 @@ static struct cpuidle_device apm_cpuidle_device;
+ /*
+  * Local variables
+  */
+-static struct {
++__visible struct {
+ 	unsigned long	offset;
+ 	unsigned short	segment;
+ } apm_bios_entry;
+-- 
+cgit v0.12
+

pkgs/os-specific/linux/kernel/gcc5-link-lguest.patch

···
+From cdd77e87eae52b7251acc5990207a1c4500a84ce Mon Sep 17 00:00:00 2001
+From: Andi Kleen <[e-mail]>
+Date: Tue, 5 Nov 2013 21:22:28 +1030
+Subject: x86, asmlinkage, lguest: Pass in globals into assembler statement
+
+Tell the compiler that the inline assembler statement
+references lguest_entry.
+
+This fixes compile problems with LTO where the variable
+and the assembler code may end up in different files.
+
+Cc: [e-mail]
+Cc: [e-mail]
+Signed-off-by: Andi Kleen <[e-mail]>
+Signed-off-by: Rusty Russell <[e-mail]>
+---
+ drivers/lguest/x86/core.c | 6 ++++--
+ 1 file changed, 4 insertions(+), 2 deletions(-)
+
+diff --git a/drivers/lguest/x86/core.c b/drivers/lguest/x86/core.c
+index 5169239..922a1ac 100644
+--- a/drivers/lguest/x86/core.c
++++ b/drivers/lguest/x86/core.c
+@@ -157,7 +157,7 @@ static void run_guest_once(struct lg_cpu *cpu, struct lguest_pages *pages)
+ 	 * stack, then the address of this call.  This stack layout happens to
+ 	 * exactly match the stack layout created by an interrupt...
+ 	 */
+-	asm volatile("pushf; lcall *lguest_entry"
++	asm volatile("pushf; lcall *%4"
+ 		     /*
+ 		      * This is how we tell GCC that %eax ("a") and %ebx ("b")
+ 		      * are changed by this routine.  The "=" means output.
+@@ -169,7 +169,9 @@ static void run_guest_once(struct lg_cpu *cpu, struct lguest_pages *pages)
+ 		      * physical address of the Guest's top-level page
+ 		      * directory.
+ 		      */
+-		     : "0"(pages), "1"(__pa(cpu->lg->pgdirs[cpu->cpu_pgd].pgdir))
++		     : "0"(pages), 
++		       "1"(__pa(cpu->lg->pgdirs[cpu->cpu_pgd].pgdir)),
++		       "m"(lguest_entry)
+ 		     /*
+ 		      * We tell gcc that all these registers could change,
+ 		      * which means we don't have to save and restore them in
+-- 
+cgit v0.12
+

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

···
 
 rec {
 
+  link_lguest =
+    { name = "gcc5-link-lguest";
+      patch = ./gcc5-link-lguest.patch;
+    };
+
+  link_apm =
+    { name = "gcc5-link-apm";
+      patch = ./gcc5-link-apm.patch;
+    };
+
   bridge_stp_helper =
     { name = "bridge-stp-helper";
       patch = ./bridge-stp-helper.patch;

pkgs/top-level/all-packages.nix

···
   };
 
   linux_3_10 = callPackage ../os-specific/linux/kernel/linux-3.10.nix {
-    kernelPatches = [ kernelPatches.bridge_stp_helper ]
+    kernelPatches = with kernelPatches; [ bridge_stp_helper link_lguest link_apm ]
       ++ lib.optionals ((platform.kernelArch or null) == "mips")
       [ kernelPatches.mips_fpureg_emu
         kernelPatches.mips_fpu_sigill
···
   };
 
   linux_3_12 = callPackage ../os-specific/linux/kernel/linux-3.12.nix {
-    kernelPatches = [ kernelPatches.bridge_stp_helper kernelPatches.crc_regression ]
+    kernelPatches = with kernelPatches; [ bridge_stp_helper crc_regression link_lguest ]
       ++ lib.optionals ((platform.kernelArch or null) == "mips")
       [ kernelPatches.mips_fpureg_emu
         kernelPatches.mips_fpu_sigill