On Wed, May 20, 2015 at 08:16:24AM -0500, Bjorn Helgaas wrote:
On Tue, May 19, 2015 at 1:08 AM, Tina Ruchandani ruchandani.tina@gmail.com wrote:
struct timeval uses a 32-bit field for representing seconds, which will overflow in the year 2038 and beyond. This patch replaces struct timeval with 64-bit ktime_t which is 2038 safe. The patch is part of a larger effort to remove instances of 32-bit timekeeping variables (timeval, time_t and timespec) from the kernel.
Signed-off-by: Tina Ruchandani ruchandani.tina@gmail.com Suggested-by: Arnd Bergmann arnd@arndb.de
Acked-by: Bjorn Helgaas bhelgaas@google.com
This isn't PCI-related, so I expect Konrad, Boris, or David will merge this.
OK. Thanks.
-- Changes in v2:
- Use monotonic time (ktime_get_ns()) instead of real time
since we only care about elapsed delta here.
- Use macro ktime_get_ns() instead of getting ktime_t and
converting it to ns.
drivers/pci/xen-pcifront.c | 8 +++----- 1 file changed, 3 insertions(+), 5 deletions(-)
diff --git a/drivers/pci/xen-pcifront.c b/drivers/pci/xen-pcifront.c index 7cfd2db..c4796c8 100644 --- a/drivers/pci/xen-pcifront.c +++ b/drivers/pci/xen-pcifront.c @@ -20,6 +20,7 @@ #include <linux/workqueue.h> #include <linux/bitops.h> #include <linux/time.h> +#include <linux/ktime.h> #include <xen/platform_pci.h>
#include <asm/xen/swiotlb-xen.h> @@ -115,7 +116,6 @@ static int do_pci_op(struct pcifront_device *pdev, struct xen_pci_op *op) evtchn_port_t port = pdev->evtchn; unsigned irq = pdev->irq; s64 ns, ns_timeout;
struct timeval tv; spin_lock_irqsave(&pdev->sh_info_lock, irq_flags);@@ -132,8 +132,7 @@ static int do_pci_op(struct pcifront_device *pdev, struct xen_pci_op *op) * (in the latter case we end up continually re-executing poll() with a * timeout in the past). 1s difference gives plenty of slack for error. */
do_gettimeofday(&tv);ns_timeout = timeval_to_ns(&tv) + 2 * (s64)NSEC_PER_SEC;
ns_timeout = ktime_get_ns() + 2 * (s64)NSEC_PER_SEC; xen_clear_irq_pending(irq);@@ -141,8 +140,7 @@ static int do_pci_op(struct pcifront_device *pdev, struct xen_pci_op *op) (unsigned long *)&pdev->sh_info->flags)) { xen_poll_irq_timeout(irq, jiffies + 3*HZ); xen_clear_irq_pending(irq);
do_gettimeofday(&tv);ns = timeval_to_ns(&tv);
ns = ktime_get_ns(); if (ns > ns_timeout) { dev_err(&pdev->xdev->dev, "pciback not responding!!!\n");-- 2.2.0.rc0.207.ga3a616c