linux-kernel - [80/89] x86: devicetree: Add missing early_init_dt_setup_initrd

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Date:	Wed, 15 Jun 2011 17:00:43 -0700
From:	Greg KH <gregkh@...e.de>
To:	linux-kernel@...r.kernel.org, stable@...nel.org
Cc:	stable-review@...nel.org, torvalds@...ux-foundation.org,
	akpm@...ux-foundation.org, alan@...rguk.ukuu.org.uk,
	Florian Fainelli <ffainelli@...ebox.fr>,
	Grant Likely <grant.likely@...retlab.ca>,
	Maxime Bizon <mbizon@...ebox.fr>,
	Sebastian Andrzej Siewior <sebastian@...akpoint.cc>,
	Thomas Gleixner <tglx@...utronix.de>
Subject: [80/89] x86: devicetree: Add missing early_init_dt_setup_initrd_arch

2.6.39-stable review patch.  If anyone has any objections, please let us know.

------------------
 stub

From: Florian Fainelli <ffainelli@...ebox.fr>

commit 977cb76d52e7aa040e18a84b29fe6fd80d79319b upstream.

This patch fixes the following build failure:

drivers/built-in.o: In function `early_init_dt_check_for_initrd':
/home/florian/dev/kernel/x86/linux-2.6-x86/drivers/of/fdt.c:571:
undefined reference to `early_init_dt_setup_initrd_arch'
make: *** [.tmp_vmlinux1] Error 1

which happens as soon as we enable initrd support on a x86 devicetree
platform such as Intel CE4100.

Signed-off-by: Florian Fainelli <ffainelli@...ebox.fr>
Acked-by: Grant Likely <grant.likely@...retlab.ca>
Cc: Maxime Bizon <mbizon@...ebox.fr>
Acked-by: Sebastian Andrzej Siewior <sebastian@...akpoint.cc>
Link: http://lkml.kernel.org/r/201106061015.50039.ffainelli@freebox.fr
Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de>

---
 arch/x86/kernel/devicetree.c |   11 +++++++++++
 1 file changed, 11 insertions(+)

--- a/arch/x86/kernel/devicetree.c
+++ b/arch/x86/kernel/devicetree.c
@@ -13,6 +13,7 @@
 #include <linux/slab.h>
 #include <linux/pci.h>
 #include <linux/of_pci.h>
+#include <linux/initrd.h>
 
 #include <asm/hpet.h>
 #include <asm/irq_controller.h>
@@ -98,6 +99,16 @@ void * __init early_init_dt_alloc_memory
 	return __alloc_bootmem(size, align, __pa(MAX_DMA_ADDRESS));
 }
 
+#ifdef CONFIG_BLK_DEV_INITRD
+void __init early_init_dt_setup_initrd_arch(unsigned long start,
+					    unsigned long end)
+{
+	initrd_start = (unsigned long)__va(start);
+	initrd_end = (unsigned long)__va(end);
+	initrd_below_start_ok = 1;
+}
+#endif
+
 void __init add_dtb(u64 data)
 {
 	initial_dtb = data + offsetof(struct setup_data, data);


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