Imported linux-2.6.27.39 suse/xen patches.

[ipfire-2.x.git] / src / patches / suse-2.6.27.39 / patches.xen / xen3-remove_kernel_physical_mapping_init_from_init

From: Gary Hade <garyhade@us.ibm.com>
Subject: move kernel_physical_mapping_init to __meminit
Patch-mainline: 2.6.29 (probably)
References: bnc#467474

kernel_physical_mapping_init() is called during memory hotplug
so it does not belong in the init section.

If the kernel is built with CONFIG_DEBUG_SECTION_MISMATCH=y on
the make command line, arch/x86/mm/init_64.c is compiled with
the -fno-inline-functions-called-once gcc option defeating
inlining of kernel_physical_mapping_init() within init_memory_mapping().
When kernel_physical_mapping_init() is not inlined it is placed
in the .init.text section according to the __init in it's current
declaration.  A later call to kernel_physical_mapping_init() during
a memory hotplug operation encounters an int3 trap because the
.init.text section memory has been freed.  This patch eliminates
the crash caused by the int3 trap by moving the non-inlined
kernel_physical_mapping_init() from .init.text to .meminit.text.

Signed-off-by: Gary Hade <garyhade@us.ibm.com>
Acked-by: Jeff Mahoney <jeffm@suse.com>
Automatically created from "patches.fixes/remove_kernel_physical_mapping_init_from_init" by xen-port-patches.py

--- sle11-2009-02-16.orig/arch/x86/mm/init_64-xen.c	2009-02-17 18:05:39.000000000 +0100
+++ sle11-2009-02-16/arch/x86/mm/init_64-xen.c	2009-02-17 18:05:54.000000000 +0100
@@ -739,7 +739,7 @@ static void __init init_gbpages(void)
 #endif
 }
 
-static unsigned long __init kernel_physical_mapping_init(unsigned long start,
+static unsigned long __meminit kernel_physical_mapping_init(unsigned long start,
 						unsigned long end,
 						unsigned long page_size_mask)
 {