On Sun, 29 Nov 2020 08:51:47 -0800
"Michael Kelley" <mikelley@xxxxxxxxxxxxx> wrote:
> From: Matheus Castello <matheus@xxxxxxxxxxxxxxx> Sent: Tuesday, November
> 24, 2020 7:29 PM
> >
> > Checkpatch emits WARNING: quoted string split across lines.
> > To keep the code clean and with the 80 column length indentation the
> > check and registration code for kmsg_dump_register has been transferred
> > to a new function hv_kmsg_dump_register.
> >
> > Signed-off-by: Matheus Castello <matheus@xxxxxxxxxxxxxxx>
> > ---
> > This is the V3 of patch 4 of the series "Add improvements suggested by
> > checkpatch for vmbus_drv" with the changes suggested by Michael Kelley
> and
> > Joe Perches. Thanks!
> > ---
> > drivers/hv/vmbus_drv.c | 35 ++++++++++++++++++++---------------
> > 1 file changed, 20 insertions(+), 15 deletions(-)
> >
> > diff --git a/drivers/hv/vmbus_drv.c b/drivers/hv/vmbus_drv.c
> > index 61d28c743263..edcc419ba328 100644
> > --- a/drivers/hv/vmbus_drv.c
> > +++ b/drivers/hv/vmbus_drv.c
> > @@ -1387,6 +1387,24 @@ static struct kmsg_dumper hv_kmsg_dumper = {
> > .dump = hv_kmsg_dump,
> > };
> >
> > +static void hv_kmsg_dump_register(void)
> > +{
> > + int ret;
> > +
> > + hv_panic_page = (void *)hv_alloc_hyperv_zeroed_page();
I know you just copy/pasted the original code, but one other thing.
Doesn't it already return void *?
arch/x86/include/asm/mshyperv.h:void *hv_alloc_hyperv_zeroed_page(void);
> > + if (!hv_panic_page) {
> > + pr_err("Hyper-V: panic message page memory allocation
> failed\n");
> > + return;
> > + }
> > +
> > + ret = kmsg_dump_register(&hv_kmsg_dumper);
> > + if (ret) {
> > + pr_err("Hyper-V: kmsg dump register error 0x%x\n", ret);
> > + hv_free_hyperv_page((unsigned long)hv_panic_page);
> > + hv_panic_page = NULL;
> > + }
> > +}
> > +
> > static struct ctl_table_header *hv_ctl_table_hdr;
> >
> > /*
> > @@ -1477,21 +1495,8 @@ static int vmbus_bus_init(void)
> > * capability is supported by the hypervisor.
> > */
> > hv_get_crash_ctl(hyperv_crash_ctl);
> > - if (hyperv_crash_ctl & HV_CRASH_CTL_CRASH_NOTIFY_MSG) {
> > - hv_panic_page = (void
> *)hv_alloc_hyperv_zeroed_page();
> > - if (hv_panic_page) {
> > - ret = kmsg_dump_register(&hv_kmsg_dumper);
> > - if (ret) {
> > - pr_err("Hyper-V: kmsg dump
> register "
> > - "error 0x%x\n", ret);
> > - hv_free_hyperv_page(
> > - (unsigned long)hv_panic_page);
> > - hv_panic_page = NULL;
> > - }
> > - } else
> > - pr_err("Hyper-V: panic message page memory
> "
> > - "allocation failed");
> > - }
> > + if (hyperv_crash_ctl & HV_CRASH_CTL_CRASH_NOTIFY_MSG)
> > + hv_kmsg_dump_register();
> >
> > register_die_notifier(&hyperv_die_block);
> > }
> > --
> > 2.29.2
>
> Reviewed-by: Michael Kelley <mikelley@xxxxxxxxxxxxx>
>
