| Message ID | 20161012145434.2493788-1-arnd@arndb.de (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
> -----Original Message----- > From: Arnd Bergmann [mailto:arnd@arndb.de] > Sent: 12 October 2016 10:54 > To: Wei Liu <wei.liu2@citrix.com>; Paul Durrant <Paul.Durrant@citrix.com> > Cc: Arnd Bergmann <arnd@arndb.de>; David S. Miller > <davem@davemloft.net>; David Vrabel <david.vrabel@citrix.com>; xen- > devel@lists.xenproject.org; netdev@vger.kernel.org; linux- > kernel@vger.kernel.org > Subject: [PATCH] xen-netback: fix type mismatch warning > > Wiht the latest rework of the xen-netback driver, we get a warning > on ARM about the types passed into min(): > > drivers/net/xen-netback/rx.c: In function 'xenvif_rx_next_chunk': > include/linux/kernel.h:739:16: error: comparison of distinct pointer types > lacks a cast [-Werror] > > The reason is that XEN_PAGE_SIZE is not size_t here. There > is no actual bug, and we can easily avoid the warning using the > min_t() macro instead of min(). > > Fixes: eb1723a29b9a ("xen-netback: refactor guest rx") > Signed-off-by: Arnd Bergmann <arnd@arndb.de> LGTM Acked-by: Paul Durrant <paul.durrant@citrix.com> > --- > drivers/net/xen-netback/rx.c | 6 +++--- > 1 file changed, 3 insertions(+), 3 deletions(-) > > diff --git a/drivers/net/xen-netback/rx.c b/drivers/net/xen-netback/rx.c > index 8e9ade6ccf18..aeb150258c6c 100644 > --- a/drivers/net/xen-netback/rx.c > +++ b/drivers/net/xen-netback/rx.c > @@ -337,9 +337,9 @@ static void xenvif_rx_next_chunk(struct > xenvif_queue *queue, > frag_data += pkt->frag_offset; > frag_len -= pkt->frag_offset; > > - chunk_len = min(frag_len, XEN_PAGE_SIZE - offset); > - chunk_len = min(chunk_len, > - XEN_PAGE_SIZE - > xen_offset_in_page(frag_data)); > + chunk_len = min_t(size_t, frag_len, XEN_PAGE_SIZE - offset); > + chunk_len = min_t(size_t, chunk_len, XEN_PAGE_SIZE - > + xen_offset_in_page(frag_data)); > > pkt->frag_offset += chunk_len; > > -- > 2.9.0
From: Arnd Bergmann <arnd@arndb.de> Date: Wed, 12 Oct 2016 16:54:01 +0200 > Wiht the latest rework of the xen-netback driver, we get a warning > on ARM about the types passed into min(): > > drivers/net/xen-netback/rx.c: In function 'xenvif_rx_next_chunk': > include/linux/kernel.h:739:16: error: comparison of distinct pointer types lacks a cast [-Werror] > > The reason is that XEN_PAGE_SIZE is not size_t here. There > is no actual bug, and we can easily avoid the warning using the > min_t() macro instead of min(). > > Fixes: eb1723a29b9a ("xen-netback: refactor guest rx") > Signed-off-by: Arnd Bergmann <arnd@arndb.de> Applied, thanks.
diff --git a/drivers/net/xen-netback/rx.c b/drivers/net/xen-netback/rx.c index 8e9ade6ccf18..aeb150258c6c 100644 --- a/drivers/net/xen-netback/rx.c +++ b/drivers/net/xen-netback/rx.c @@ -337,9 +337,9 @@ static void xenvif_rx_next_chunk(struct xenvif_queue *queue, frag_data += pkt->frag_offset; frag_len -= pkt->frag_offset; - chunk_len = min(frag_len, XEN_PAGE_SIZE - offset); - chunk_len = min(chunk_len, - XEN_PAGE_SIZE - xen_offset_in_page(frag_data)); + chunk_len = min_t(size_t, frag_len, XEN_PAGE_SIZE - offset); + chunk_len = min_t(size_t, chunk_len, XEN_PAGE_SIZE - + xen_offset_in_page(frag_data)); pkt->frag_offset += chunk_len;
Wiht the latest rework of the xen-netback driver, we get a warning on ARM about the types passed into min(): drivers/net/xen-netback/rx.c: In function 'xenvif_rx_next_chunk': include/linux/kernel.h:739:16: error: comparison of distinct pointer types lacks a cast [-Werror] The reason is that XEN_PAGE_SIZE is not size_t here. There is no actual bug, and we can easily avoid the warning using the min_t() macro instead of min(). Fixes: eb1723a29b9a ("xen-netback: refactor guest rx") Signed-off-by: Arnd Bergmann <arnd@arndb.de> --- drivers/net/xen-netback/rx.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-)