mm/memory_hotplug.c: 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@hp.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c
index bef133edbe49699bbf70676b40730daa2b935677..85349c23286882b5409ec430e7ef53d10ebc16cf 100644 (file)
--- 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;
        }