Patrick Georgi ([email protected]) just uploaded a new patch set to 
gerrit, which you can find at http://review.coreboot.org/551

-gerrit

commit 5d901c1f09cbf1c7b633c96bdcd6d654581bcfbf
Author: Patrick Georgi <[email protected]>
Date:   Fri Nov 18 11:56:38 2011 +0100

    libpayload: style: compare null-pointers with NULL, not 0
    
    Change-Id: I5efbfb75e2894bc8d8e50c8737cfee9738d15eda
    Signed-off-by: Patrick Georgi <[email protected]>
---
 payloads/libpayload/drivers/usb/usb.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/payloads/libpayload/drivers/usb/usb.c 
b/payloads/libpayload/drivers/usb/usb.c
index 995b4c2..1f21e6a 100644
--- a/payloads/libpayload/drivers/usb/usb.c
+++ b/payloads/libpayload/drivers/usb/usb.c
@@ -76,7 +76,7 @@ usb_exit (void)
        if (usb_hcs == 0)
                return 0;
        hci_t *controller = usb_hcs;
-       while (controller != 0) {
+       while (controller != NULL) {
                controller->shutdown(controller);
                controller = controller->next;
        }
@@ -92,7 +92,7 @@ usb_poll (void)
        if (usb_hcs == 0)
                return;
        hci_t *controller = usb_hcs;
-       while (controller != 0) {
+       while (controller != NULL) {
                int i;
                for (i = 0; i < 128; i++) {
                        if (controller->devices[i] != 0) {

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