Re: [PATCH] xen/netback: Pass (void *) to virt_to_page()
On Wed, May 24, 2023 at 10:11:47PM -0700, Jakub Kicinski wrote: > On Tue, 23 May 2023 16:03:42 +0200 Linus Walleij wrote: > > virt_to_page() takes a virtual address as argument but > > the driver passes an unsigned long, which works because > > the target platform(s) uses polymorphic macros to calculate > > the page. > > > > Since many architectures implement virt_to_pfn() as > > a macro, this function becomes polymorphic and accepts both a > > (unsigned long) and a (void *). > > > > Fix this up by an explicit (void *) cast. > > Paul, Wei, looks like netdev may be the usual path for this patch > to flow thru, although I'm never 100% sure with Xen. Yes. Netdev is the right path. Thanks, Wei.
Re: [PATCH] xen/netback: Pass (void *) to virt_to_page()
On Thu, May 25, 2023 at 7:12 AM Jakub Kicinski wrote: > On Wed, 24 May 2023 22:11:47 -0700 Jakub Kicinski wrote: > > On Tue, 23 May 2023 16:03:42 +0200 Linus Walleij wrote: > > > virt_to_page() takes a virtual address as argument but > > > the driver passes an unsigned long, which works because > > > the target platform(s) uses polymorphic macros to calculate > > > the page. > > > > > > Since many architectures implement virt_to_pfn() as > > > a macro, this function becomes polymorphic and accepts both a > > > (unsigned long) and a (void *). > > > > > > Fix this up by an explicit (void *) cast. > > > > Paul, Wei, looks like netdev may be the usual path for this patch > > to flow thru, although I'm never 100% sure with Xen. > > Please ack or LUK if you prefer to direct the patch elsewhere? > > Ugh, Wei already acked this, sorry for the noise. Don't worry about it Jakub, it's queued in the asm-generic tree along with patches making things give nasty compile messages if they are not typed right, we try to keep down the level of noise this way: silence it while fixing the root cause. If you prefer to take it into the net tree that works too but no need. Yours, Linus Walleij
Re: [PATCH] xen/netback: Pass (void *) to virt_to_page()
On Wed, 24 May 2023 22:11:47 -0700 Jakub Kicinski wrote: > On Tue, 23 May 2023 16:03:42 +0200 Linus Walleij wrote: > > virt_to_page() takes a virtual address as argument but > > the driver passes an unsigned long, which works because > > the target platform(s) uses polymorphic macros to calculate > > the page. > > > > Since many architectures implement virt_to_pfn() as > > a macro, this function becomes polymorphic and accepts both a > > (unsigned long) and a (void *). > > > > Fix this up by an explicit (void *) cast. > > Paul, Wei, looks like netdev may be the usual path for this patch > to flow thru, although I'm never 100% sure with Xen. > Please ack or LUK if you prefer to direct the patch elsewhere? Ugh, Wei already acked this, sorry for the noise.
Re: [PATCH] xen/netback: Pass (void *) to virt_to_page()
On Tue, 23 May 2023 16:03:42 +0200 Linus Walleij wrote: > virt_to_page() takes a virtual address as argument but > the driver passes an unsigned long, which works because > the target platform(s) uses polymorphic macros to calculate > the page. > > Since many architectures implement virt_to_pfn() as > a macro, this function becomes polymorphic and accepts both a > (unsigned long) and a (void *). > > Fix this up by an explicit (void *) cast. Paul, Wei, looks like netdev may be the usual path for this patch to flow thru, although I'm never 100% sure with Xen. Please ack or LUK if you prefer to direct the patch elsewhere?
Re: [PATCH] xen/netback: Pass (void *) to virt_to_page()
On Tue, May 23, 2023 at 04:03:42PM +0200, Linus Walleij wrote: > virt_to_page() takes a virtual address as argument but > the driver passes an unsigned long, which works because > the target platform(s) uses polymorphic macros to calculate > the page. > > Since many architectures implement virt_to_pfn() as > a macro, this function becomes polymorphic and accepts both a > (unsigned long) and a (void *). > > Fix this up by an explicit (void *) cast. > > Cc: Wei Liu > Cc: Paul Durrant > Cc: xen-devel@lists.xenproject.org > Cc: net...@vger.kernel.org > Signed-off-by: Linus Walleij Acked-by: Wei Liu
[PATCH] xen/netback: Pass (void *) to virt_to_page()
virt_to_page() takes a virtual address as argument but the driver passes an unsigned long, which works because the target platform(s) uses polymorphic macros to calculate the page. Since many architectures implement virt_to_pfn() as a macro, this function becomes polymorphic and accepts both a (unsigned long) and a (void *). Fix this up by an explicit (void *) cast. Cc: Wei Liu Cc: Paul Durrant Cc: xen-devel@lists.xenproject.org Cc: net...@vger.kernel.org Signed-off-by: Linus Walleij --- drivers/net/xen-netback/netback.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/net/xen-netback/netback.c b/drivers/net/xen-netback/netback.c index c1501f41e2d8..caf0c815436c 100644 --- a/drivers/net/xen-netback/netback.c +++ b/drivers/net/xen-netback/netback.c @@ -689,7 +689,7 @@ static void xenvif_fill_frags(struct xenvif_queue *queue, struct sk_buff *skb) prev_pending_idx = pending_idx; txp = >pending_tx_info[pending_idx].req; - page = virt_to_page(idx_to_kaddr(queue, pending_idx)); + page = virt_to_page((void *)idx_to_kaddr(queue, pending_idx)); __skb_fill_page_desc(skb, i, page, txp->offset, txp->size); skb->len += txp->size; skb->data_len += txp->size; -- 2.34.1
