From: Geert Uytterhoeven <geert@linux-m68k.org>
To: Christoph Hellwig <hch@lst.de>,
Marek Szyprowski <m.szyprowski@samsung.com>,
Robin Murphy <robin.murphy@arm.com>,
Arnd Bergmann <arnd@arndb.de>, Mark Brown <broonie@kernel.org>,
Richard Weinberger <richard@nod.at>
Cc: Felipe Balbi <balbi@kernel.org>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
"James E . J . Bottomley" <jejb@linux.vnet.ibm.com>,
"Martin K . Petersen" <martin.petersen@oracle.com>,
iommu@lists.linux-foundation.org, linux-usb@vger.kernel.org,
linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-arch@vger.kernel.org,
Geert Uytterhoeven <geert@linux-m68k.org>
Subject: [PATCH/RFC 3/6] usb: gadget: Add NO_DMA dummies for DMA mapping API
Date: Tue, 6 Feb 2018 11:14:49 +0100 [thread overview]
Message-ID: <1517912092-15470-4-git-send-email-geert@linux-m68k.org> (raw)
In-Reply-To: <1517912092-15470-1-git-send-email-geert@linux-m68k.org>
Add dummies for usb_gadget_{,un}map_request{,_by_dev}(), to allow
compile-testing if NO_DMA=y.
This prevents the following from showing up later:
ERROR: "usb_gadget_unmap_request_by_dev" [drivers/usb/renesas_usbhs/renesas_usbhs.ko] undefined!
ERROR: "usb_gadget_map_request_by_dev" [drivers/usb/renesas_usbhs/renesas_usbhs.ko] undefined!
ERROR: "usb_gadget_map_request" [drivers/usb/mtu3/mtu3.ko] undefined!
ERROR: "usb_gadget_unmap_request" [drivers/usb/mtu3/mtu3.ko] undefined!
ERROR: "usb_gadget_map_request" [drivers/usb/gadget/udc/renesas_usb3.ko] undefined!
ERROR: "usb_gadget_unmap_request" [drivers/usb/gadget/udc/renesas_usb3.ko] undefined!
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
---
include/linux/usb/gadget.h | 12 ++++++++++++
1 file changed, 12 insertions(+)
diff --git a/include/linux/usb/gadget.h b/include/linux/usb/gadget.h
index 66a5cff7ee142d6a..b68e7f9b210be122 100644
--- a/include/linux/usb/gadget.h
+++ b/include/linux/usb/gadget.h
@@ -805,6 +805,7 @@ int usb_otg_descriptor_init(struct usb_gadget *gadget,
/* utility to simplify map/unmap of usb_requests to/from DMA */
+#ifdef CONFIG_HAS_DMA
extern int usb_gadget_map_request_by_dev(struct device *dev,
struct usb_request *req, int is_in);
extern int usb_gadget_map_request(struct usb_gadget *gadget,
@@ -814,6 +815,17 @@ extern void usb_gadget_unmap_request_by_dev(struct device *dev,
struct usb_request *req, int is_in);
extern void usb_gadget_unmap_request(struct usb_gadget *gadget,
struct usb_request *req, int is_in);
+#else /* !CONFIG_HAS_DMA */
+static inline int usb_gadget_map_request_by_dev(struct device *dev,
+ struct usb_request *req, int is_in) { return -ENOSYS; }
+static inline int usb_gadget_map_request(struct usb_gadget *gadget,
+ struct usb_request *req, int is_in) { return -ENOSYS; }
+
+static inline void usb_gadget_unmap_request_by_dev(struct device *dev,
+ struct usb_request *req, int is_in) { }
+static inline void usb_gadget_unmap_request(struct usb_gadget *gadget,
+ struct usb_request *req, int is_in) { }
+#endif /* !CONFIG_HAS_DMA */
/*-------------------------------------------------------------------------*/
--
2.7.4
next prev parent reply other threads:[~2018-02-06 10:15 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-02-06 10:14 [PATCH/RFC 0/6] Allow compile-testing NO_DMA Geert Uytterhoeven
2018-02-06 10:14 ` [PATCH/RFC 1/6] dma-mapping: Convert NO_DMA get_dma_ops() into a real dummy Geert Uytterhoeven
2018-02-06 10:14 ` [PATCH/RFC 2/6] dma-coherent: Add NO_DMA dummies for managed DMA API Geert Uytterhoeven
2018-02-06 10:14 ` Geert Uytterhoeven [this message]
2018-02-15 13:18 ` [PATCH/RFC 3/6] usb: gadget: Add NO_DMA dummies for DMA mapping API Felipe Balbi
2018-02-06 10:14 ` [PATCH/RFC 4/6] mm: Add NO_DMA dummies for DMA pool API Geert Uytterhoeven
2018-02-06 12:47 ` Robin Murphy
2018-02-06 10:14 ` [PATCH/RFC 5/6] scsi: Add NO_DMA dummies for SCSI DMA mapping API Geert Uytterhoeven
2018-02-06 10:14 ` [PATCH/RFC 6/6] Treewide: Remove depends on HAS_DMA in case of platform dependency Geert Uytterhoeven
2018-02-15 13:19 ` Felipe Balbi
2018-02-06 12:01 ` [PATCH/RFC 0/6] Allow compile-testing NO_DMA Mark Brown
2018-02-06 13:05 ` Robin Murphy
2018-02-06 15:24 ` Arnd Bergmann
2018-02-06 15:16 ` Arnd Bergmann
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