linux-kernel - [PATCH] mm: Change normal message to use pr

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Date:	Tue, 21 May 2013 15:33:54 -0600
From:	Toshi Kani <toshi.kani@...com>
To:	akpm@...ux-foundation.org
Cc:	linux-mm@...ck.org, linux-kernel@...r.kernel.org,
	isimatu.yasuaki@...fujitsu.com, tangchen@...fujitsu.com,
	Toshi Kani <toshi.kani@...com>
Subject: [PATCH] mm: Change normal message to use pr_debug

During early boot-up, iomem_resource is set up from the boot
descriptor table, such as EFI Memory Table and e820.  Later,
acpi_memory_device_add() calls add_memory() for each ACPI
memory device object as it enumerates ACPI namespace.  This
add_memory() call is expected to fail in register_memory_resource()
at boot since iomem_resource has been set up from EFI/e820.
As a result, add_memory() returns -EEXIST, which
acpi_memory_device_add() handles as the normal case.

This scheme works fine, but the following error message is
logged for every ACPI memory device object during boot-up.

  "System RAM resource %pR cannot be added\n"

This patch changes register_memory_resource() to use pr_debug()
for the message as it shows up under the normal case.

Signed-off-by: Toshi Kani <toshi.kani@...com>
---
 mm/memory_hotplug.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c
index 5ea1287..90ebc91 100644
--- a/mm/memory_hotplug.c
+++ b/mm/memory_hotplug.c
@@ -75,7 +75,7 @@ static struct resource *register_memory_resource(u64 start, u64 size)
 	res->end = start + size - 1;
 	res->flags = IORESOURCE_MEM | IORESOURCE_BUSY;
 	if (request_resource(&iomem_resource, res) < 0) {
-		printk("System RAM resource %pR cannot be added\n", res);
+		pr_debug("System RAM resource %pR cannot be added\n", res);
 		kfree(res);
 		res = NULL;
 	}
--
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